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Journal articles on the topic 'Marsupials'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

SOUZA ROCHA, Katarine de, Gleiciane SCHUPP DE SENA MESQUITA, Maeli Fernanda SILVA FERREIRA, et al. "New records of Leptospira spp. in wild marsupials and a rodent in the eastern Brazilian Amazon through PCR detection." Acta Amazonica 50, no. 4 (2020): 305–8. http://dx.doi.org/10.1590/1809-4392201903683.

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ABSTRACT We analyzed the presence of Leptospira spp. in liver and kidney tissue of wild marsupials and rodents trapped in a periurban forest in the eastern Brazilian Amazon. We examined 25 individuals of four marsupial and seven rodent species for the presence of the 16S rRNA gene of Leptospira in the DNA extracted from 47 liver and kidney tissue samples using PCR. We detected positive samples in 12% (3/25) of the individuals, in kidney fragments of two marsupial species (Didelphis marsupialis and Marmosops pinheiroi) and in a liver fragment of one rodent species (Echimys chrysurus). These are

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2

Cifelli, Richard L., and Christian De Muizon. "Marsupial mammal from the Upper Cretaceous North Horn Formation, Central Utah." Journal of Paleontology 72, no. 3 (1998): 532–37. http://dx.doi.org/10.1017/s0022336000024306.

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Little is known of the non-dinosaurian fauna from the Cretaceous (Maastrichtian) part of the North Horn Formation, despite its biogeographic importance. Herein we describe a new marsupial mammal from the unit, founded on an exceptionally complete specimen of a juvenile individual, and present new information on the incisor region of early marsupials, based on comparison with complete specimens from the early Paleocene of Bolivia. Alphadon eatoni, new species, is the smallest Lancian species of the genus, and departs from a presumed marsupial morphotype in having the second lower incisor enlarg

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3

J. Foley, William. "Marsupial Nutrition." Pacific Conservation Biology 5, no. 3 (1999): 240. http://dx.doi.org/10.1071/pc99240a.

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In the early 1980s advances in marsupial biology could no longer be encapsulated in a single volume such as Hugh Tyndale-Biscoe's "Life of Marsupials" and Cambridge University Press commissioned a series of monographs covering a range of different topics in marsupial biology. As it was, only three of that series were realized and among them was the ptedecessor to this book "Digestive Physiology and Nutrition of Marsupials" published in 1982. "Marsupial Nutrition" is a considerably expanded and comprehensive review of studies of nutrition and digestive physiology of Australasian and South Ameri

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4

Kirsch, John A. W., Mark S. Springer, and François-Joseph Lapointe. "DNA-hybridisation Studies of Marsupials and their Implications for Metatherian Classification." Australian Journal of Zoology 45, no. 3 (1997): 211. http://dx.doi.org/10.1071/zo96030.

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We review past DNA-hybridisation studies of marsupials and present a reanalysis of the data, utilising results from our and additional studies to formulate and rationalise a new classification of Marsupialia. In the reanalysis, 13 individual DNA-hybridisation matrices, many lacking some pairwise comparisons, were sutured in stages to provide the basis for generating a tree of 101 marsupials plus an outgroup eutherian; a fourteenth matrix provided data for a tree including eight additional eutherians and a monotreme. Validation was achieved by jackknifing on taxa for each matrix as well as on t

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5

Tyndale-Biscoe, C. H. "Australasian marsupials - to cherish and to hold." Reproduction, Fertility and Development 13, no. 8 (2001): 477. http://dx.doi.org/10.1071/rd01079.

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Considerable interchange of mammals between South America and Australasia occurred during the first half of the Tertiary, including the presence of placental mammals in Australia. This challenges the old assumption that the marsupial radiation in Australia was made possible by the absence of placental competition, and suggests that two properties of marsupial organization may have favoured their survival in the increasingly arid climates that developed after the separation of Australasia from Antarctica. The basal metabolic rates of marsupials are about 70% of equivalent placentals, so their m

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6

Cockburn, A. "Sex-Ratio Variation in Marsupials." Australian Journal of Zoology 37, no. 3 (1989): 467. http://dx.doi.org/10.1071/zo9890467.

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Many marsupials produce sex ratios biased towards male or female young. In several cases these changes are comfortably accommodated in the existing theory of sex allocation. Local resource competition and the Trivers-Willard hypothesis have been usefully applied to several data sets, and preliminary experimental work has supported the main tenets of theory. By contrast, several data sets lack explanation, and provide challenges to theoreticians. The high frequency of bias in marsupials does not result from data-dredging, as bias is usually reported in descriptive accounts of marsupial reproduc

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7

Renfree, Marilyn B. "Society for Reproductive Biology Founders' Lecture 2006 Life in the pouch: womb with a view." Reproduction, Fertility and Development 18, no. 7 (2006): 721. http://dx.doi.org/10.1071/rd06072.

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Marsupials give birth to an undeveloped altricial young after a relatively short gestation period, but have a long and sophisticated lactation with the young usually developing in a pouch. Their viviparous mode of reproduction trades placentation for lactation, exchanging the umbilical cord for the teat. The special adaptations that marsupials have developed provide us with unique insights into the evolution of all mammalian reproduction. Marsupials hold many mammalian reproductive ‘records’, for example they have the shortest known gestation but the longest embryonic diapause, the smallest ne

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8

Deakin, Janine E. "Marsupial X chromosome inactivation: past, present and future." Australian Journal of Zoology 61, no. 1 (2013): 13. http://dx.doi.org/10.1071/zo12113.

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Marsupial and eutherian mammals inactivate one X chromosome in female somatic cells in what is thought to be a means of compensating for the unbalanced X chromosome dosage between XX females and XY males. The hypothesis of X chromosome inactivation (XCI) was first published by Mary Lyon just over 50 years ago, with the discovery of XCI in marsupials occurring a decade later. However, we are still piecing together the evolutionary origins of this fascinating epigenetic mechanism. From the very first studies on marsupial X inactivation, it was apparent that, although there were some similarities

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9

Price, Gilbert J., Kyle J. Ferguson, Gregory E. Webb, et al. "Seasonal migration of marsupial megafauna in Pleistocene Sahul (Australia–New Guinea)." Proceedings of the Royal Society B: Biological Sciences 284, no. 1863 (2017): 20170785. http://dx.doi.org/10.1098/rspb.2017.0785.

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Seasonal two-way migration is an ecological phenomenon observed in a wide range of large-bodied placental mammals, but is conspicuously absent in all modern marsupials. Most extant marsupials are typically smaller in body size in comparison to their migratory placental cousins, possibly limiting their potential to undertake long-distance seasonal migrations. But what about earlier, now-extinct giant marsupial megafauna? Here we present new geochemical analyses which show that the largest of the extinct marsupial herbivores, the enormous wombat-like Diprotodon optatum , undertook seasonal, two-

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10

McKenzie, LM, and DW Cooper. "Low MHC class II variability in a marsupial." Reproduction, Fertility and Development 6, no. 6 (1994): 721. http://dx.doi.org/10.1071/rd9940721.

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The major histocompatibility complex (MHC) loci have been shown to be highly polymorphic in most eutherian ('placental') species studied. Several hypotheses have been advanced for the maintenance of this exceptional level of genetic variation, one of which suggests that it is necessary for successful eutherian reproduction. Marsupials (metatherians) and eutherians are the only two groups of viviparous mammals, but their modes of reproduction are quite distinct. Although marsupials have placentae, they are generally shorter lived and less invasive than in eutherians. Other investigations have s

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11

Tojima, Sayaka, Hidaka Anetai, Kaito Koike, et al. "Gross anatomy of the gluteal and posterior thigh muscles in koalas based on their innervations." PLOS ONE 17, no. 9 (2022): e0261805. http://dx.doi.org/10.1371/journal.pone.0261805.

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Morphological and functional comparison of convergently-evolved traits in marsupials and eutherians is an important aspect of studying adaptive divergence in mammals. However, the anatomy of marsupials has been particularly difficult to evaluate for multiple reasons. First, previous studies on marsupial anatomy are often uniformly old and non-exhaustive. Second, muscle identification was historically based on muscle attachment sites, but attachment sites have since been declared insufficient for muscle identification due to extensive interspecific variation. For example, different names have b

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12

Cowan, PE. "Changes in milk composition during lactation in the common brushtail possum, Trichosurus vulpecula (Marsupialia: Phalangeridae)." Reproduction, Fertility and Development 1, no. 4 (1989): 325. http://dx.doi.org/10.1071/rd9890325.

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The milk constituents of Trichosurus vulpecula, a folivorous marsupial, showed marked quantitative and qualitative changes during the course of lactation. The milk produced in the early stages of lactation was dilute, with about 9-13% (w/w) solids during the first 3 weeks, comprising mostly carbohydrate and protein (35-40%). At 20 weeks, about three-quarters of the way through lactation, the milk was much more concentrated, about 28% solids, with lipid the predominant fraction (30-35%), after a marked decline in carbohydrate content (20-25%). Concentrations of the electrolytes sodium and potas

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13

Sherwin, WB, and ND Murray. "Population and Conservation Genetics of Marsupials." Australian Journal of Zoology 37, no. 3 (1989): 161. http://dx.doi.org/10.1071/zo9890161.

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This article summarises current knowledge of marsupial population genetics, and discusses its relevance to the conservation of marsupial species. It has been suggested that there is much lower genetic variation within marsupial populations than in eutherian mammals. This trend is not evident in the electrophoretic data summarised here. However, genetic differentiation between populations, subspecies, and species of marsupials appears to be slightly lower than comparable values for eutherians. Genetic estimates of migration between populations are scarce at present, but show values that are com

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14

Moore, HD. "Gamete biology of the new world marsupial, the grey short-tailed opossum, Monodelphis domestica." Reproduction, Fertility and Development 8, no. 4 (1996): 605. http://dx.doi.org/10.1071/rd9960605.

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Mammalian gametes undergo a series of functional and developmental changes that culminate in fertilization. In order to appreciate the necessity for such complex processes as sperm maturation, capacitation and the intimate sperm-egg interactions leading to gamete fusion, it is important to understand how gametes may have evolved. In this respect, marsupials are particularly relevant since they exhibit features reminiscent of both non-mammalian vertebrates and eutherian mammals. The grey short-tailed opossum, Monodelphis domestica, is a New World marsupial from Brazil. It breeds well under labo

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15

Archibald, J. David. "Darwin's two competing phylogenetic trees: marsupials as ancestors or sister taxa?" Archives of Natural History 39, no. 2 (2012): 217–33. http://dx.doi.org/10.3366/anh.2012.0091.

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Studies of the origin and diversification of major groups of plants and animals are contentious topics in current evolutionary biology. This includes the study of the timing and relationships of the two major clades of extant mammals – marsupials and placentals. Molecular studies concerned with marsupial and placental origin and diversification can be at odds with the fossil record. Such studies are, however, not a recent phenomenon. Over 150 years ago Charles Darwin weighed two alternative views on the origin of marsupials and placentals. Less than a year after the publication of On the origi

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16

Fehlberg, Hllytchaikra Ferraz, Cássia Matos Ribeiro, Pedro de Alcântara Brito Junior, et al. "Detection of Cryptosporidium spp. and Giardia duodenalis in small wild mammals in northeastern Brazil." PLOS ONE 16, no. 8 (2021): e0256199. http://dx.doi.org/10.1371/journal.pone.0256199.

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This study investigated the occurrence of Giardia duodenalis and Cryptosporidium spp. in rodents and marsupials from the Atlantic Forest in southern Bahia, northeastern Brazil. Two hundred and four fecal samples were collected from different forest areas in the municipalities of Ilhéus, Una, Belmonte, and Mascote. Identifications were performed using PCR and nested PCR followed by sequencing of the gdh and tpi genes for G. duodenalis, and the gp60 and Hsp-70 genes for Cryptosporidium. The total frequency of positive PCR samples for both G. duodenalis and Cryptosporidium spp. was 5.4% (11/204).

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17

Gennari, Solange Maria, Maria Halina Ogrzewalska, Herbert Sousa Soares, et al. "Toxoplasma gondii antibodies in wild rodents and marsupials from the Atlantic Forest, state of São Paulo, Brazil." Revista Brasileira de Parasitologia Veterinária 24, no. 3 (2015): 379–82. http://dx.doi.org/10.1590/s1984-29612015045.

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Toxoplasma gondii is a protozoan parasite that infects a large spectrum of warm-blooded animals, including humans. Small rodents and marsupials play an important role in the epidemiology of T. gondii because they are sources of infection for domestic and feral cats. Serum samples from 151 rodents and 48 marsupials, captured in the Atlantic Forest, São Paulo State, southeastern Brazil, were analyzed for the presence of T. gondii antibodies. Antibodies detected by the modified agglutination test (MAT ≥ 25) were found in 8.6% (13/151) of the rodents and 10.4% (5/48) of the marsupials, with titers

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18

Burke, Catherine, Delaney Burnard, Adam Polkinghorne, Jonathan Webb, and Wilhelmina Huston. "Cloacal and Ocular Microbiota of the Endangered Australian Northern Quoll." Microorganisms 6, no. 3 (2018): 68. http://dx.doi.org/10.3390/microorganisms6030068.

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The Australian northern quoll is an important predatory marsupial carnivore that is currently endangered due to inappropriate fire regimes, predation, and the spread of invasive cane toads. The microbiota of Australian marsupials has not been extensively studied, but is thought to play a role in their health. This study provides an initial characterization of the cloacal microbiota of the northern quoll, as well as other marsupials including possums and kangaroos which were opportunistically sampled. The northern quoll cloaca microbiota was dominated by Enterococcus and Lactobacillus and had a

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19

Griffiths, M., and N. G. Simms. "Observations on the anatomy of mammary glands in two species of conilurine rodent (Muridae: Hydromyinae) and in an opossum (Marsupialia: Didelphidae)." Australian Mammalogy 16, no. 1 (1993): 9. http://dx.doi.org/10.1071/am93002.

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The pups of Pseudomys nanus and P. australis are attached to their mothers&apos; teats for extended periods of time, analogous to the situation encountered in pouchless marsupials. The structures in the mammary glands involved in facilitating prolonged attachment are different in the two rodent species and both kinds are different from those in marsupial glands including those of Monodelphis domestica, the subject of the present study. In P. nanus, the teats are anchored to postero-ventrally directed, tubular diverticula of the body wall. In P. australis there are no diverticula. However,

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Sánchez-Villagra, Marcelo R., Erik R. Seiffert, Thomas Martin, Elwyn L. Simons, Gregg F. Gunnell, and Yousry Attia. "Enigmatic new mammals from the late Eocene of Egypt." Paläontologische Zeitschrift 81, no. 4 (2007): 406–15. https://doi.org/10.5281/zenodo.13431404.

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(Uploaded by Plazi for the Bat Literature Project) A new mammalian genus and species from the earliest late Eocene of Egypt is represented by a lower jaw fragment and two isolated lower molars. A rare combination of features and the fragmentary nature of the materials make their taxonomic assignment to either Marsupialia or Chiroptera uncertain. The holotype of the new genus is the best-preserved specimen in the sample, a dentary fragment with two molars that have uncompressed trigonids, weak buccal cingulids, and a nyctalodont arrangement of the hypocristid. Some traits appear to more clearly

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Sánchez-Villagra, Marcelo R., Erik R. Seiffert, Thomas Martin, Elwyn L. Simons, Gregg F. Gunnell, and Yousry Attia. "Enigmatic new mammals from the late Eocene of Egypt." Paläontologische Zeitschrift 81, no. 4 (2007): 406–15. https://doi.org/10.5281/zenodo.13431404.

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(Uploaded by Plazi for the Bat Literature Project) A new mammalian genus and species from the earliest late Eocene of Egypt is represented by a lower jaw fragment and two isolated lower molars. A rare combination of features and the fragmentary nature of the materials make their taxonomic assignment to either Marsupialia or Chiroptera uncertain. The holotype of the new genus is the best-preserved specimen in the sample, a dentary fragment with two molars that have uncompressed trigonids, weak buccal cingulids, and a nyctalodont arrangement of the hypocristid. Some traits appear to more clearly

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Sánchez-Villagra, Marcelo R., Erik R. Seiffert, Thomas Martin, Elwyn L. Simons, Gregg F. Gunnell, and Yousry Attia. "Enigmatic new mammals from the late Eocene of Egypt." Paläontologische Zeitschrift 81, no. 4 (2007): 406–15. https://doi.org/10.5281/zenodo.13431404.

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(Uploaded by Plazi for the Bat Literature Project) A new mammalian genus and species from the earliest late Eocene of Egypt is represented by a lower jaw fragment and two isolated lower molars. A rare combination of features and the fragmentary nature of the materials make their taxonomic assignment to either Marsupialia or Chiroptera uncertain. The holotype of the new genus is the best-preserved specimen in the sample, a dentary fragment with two molars that have uncompressed trigonids, weak buccal cingulids, and a nyctalodont arrangement of the hypocristid. Some traits appear to more clearly

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23

Sánchez-Villagra, Marcelo R., Erik R. Seiffert, Thomas Martin, Elwyn L. Simons, Gregg F. Gunnell, and Yousry Attia. "Enigmatic new mammals from the late Eocene of Egypt." Paläontologische Zeitschrift 81, no. 4 (2007): 406–15. https://doi.org/10.5281/zenodo.13431404.

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(Uploaded by Plazi for the Bat Literature Project) A new mammalian genus and species from the earliest late Eocene of Egypt is represented by a lower jaw fragment and two isolated lower molars. A rare combination of features and the fragmentary nature of the materials make their taxonomic assignment to either Marsupialia or Chiroptera uncertain. The holotype of the new genus is the best-preserved specimen in the sample, a dentary fragment with two molars that have uncompressed trigonids, weak buccal cingulids, and a nyctalodont arrangement of the hypocristid. Some traits appear to more clearly

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24

Sánchez-Villagra, Marcelo R., Erik R. Seiffert, Thomas Martin, Elwyn L. Simons, Gregg F. Gunnell, and Yousry Attia. "Enigmatic new mammals from the late Eocene of Egypt." Paläontologische Zeitschrift 81, no. 4 (2007): 406–15. https://doi.org/10.5281/zenodo.13431404.

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(Uploaded by Plazi for the Bat Literature Project) A new mammalian genus and species from the earliest late Eocene of Egypt is represented by a lower jaw fragment and two isolated lower molars. A rare combination of features and the fragmentary nature of the materials make their taxonomic assignment to either Marsupialia or Chiroptera uncertain. The holotype of the new genus is the best-preserved specimen in the sample, a dentary fragment with two molars that have uncompressed trigonids, weak buccal cingulids, and a nyctalodont arrangement of the hypocristid. Some traits appear to more clearly

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25

Renfree, M. B., S. R. Frankenberg, and C. Freyer. "054. TROPHOBLAST, PLACENTA AND EARLY EMBRYO: HOW THE MARSUPIAL DEVELOPS." Reproduction, Fertility and Development 22, no. 9 (2010): 15. http://dx.doi.org/10.1071/srb10abs054.

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In marsupials, the blastocyst forms as a single cell layer of cells. The marsupial blastocyst has no inner cell mass, so the 80–100 cell tammar embryo remains in diapause as a unilaminar blastocyst. All marsupials have a unilaminar stage, but what is unusual is that in the tammar the total cessation of cell division and cell metabolism lasts for 11 months each year. Marsupials are placental mammals. The yolk sac forms the definitive placenta up to birth. Only very few marsupials, such as the bandicoot, have a chorio-allantoic placenta, which supplements the placental functions of the yolk sac.

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Katsura, Yukako, Shuji Shigenobu, and Yoko Satta. "Adaptive Evolution and Functional Differentiation of Testis-Expressed Genes in Theria." Animals 14, no. 16 (2024): 2316. http://dx.doi.org/10.3390/ani14162316.

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Gene expression patterns differ in different tissues, and the expression pattern of genes in the mammalian testis is known to be extremely variable in different species. To clarify how the testis transcriptomic pattern has evolved in particular species, we examined the evolution of the adult testis transcriptome in Theria using 10 species: two marsupials (opossum and Tasmanian devil), six eutherian (placental) mammals (human, chimpanzee, bonobo, gorilla, rhesus macaque, and mouse), and two outgroup species (platypus and chicken). We show that 22 testis-expressed genes are marsupial-specific, s

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Sánchez-Villagra, Marcelo R. "Why are There Fewer Marsupials than Placentals? On the Relevance of Geography and Physiology to Evolutionary Patterns of Mammalian Diversity and Disparity." Journal of Mammalian Evolution 20, no. 4 (2013): 279–90. https://doi.org/10.5281/zenodo.13431537.

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(Uploaded by Plazi for the Bat Literature Project) Placental mammals occupy a larger morphospace and are taxonomically more diverse than marsupials by an order of magnitude, as shown by quantitative and phylogenetic studies of several character complexes and clades. Many have suggested that life history acts as a constraint on the evolution of marsupial morphology. However, the frequent circumvention of constraints suggests that the pattern of morphospace occupation in marsupials is more a reflection of lack of ecological opportunity than one of biases in the production of variants during deve

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Sánchez-Villagra, Marcelo R. "Why are There Fewer Marsupials than Placentals? On the Relevance of Geography and Physiology to Evolutionary Patterns of Mammalian Diversity and Disparity." Journal of Mammalian Evolution 20, no. 4 (2013): 279–90. https://doi.org/10.5281/zenodo.13431537.

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(Uploaded by Plazi for the Bat Literature Project) Placental mammals occupy a larger morphospace and are taxonomically more diverse than marsupials by an order of magnitude, as shown by quantitative and phylogenetic studies of several character complexes and clades. Many have suggested that life history acts as a constraint on the evolution of marsupial morphology. However, the frequent circumvention of constraints suggests that the pattern of morphospace occupation in marsupials is more a reflection of lack of ecological opportunity than one of biases in the production of variants during deve

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Sánchez-Villagra, Marcelo R. "Why are There Fewer Marsupials than Placentals? On the Relevance of Geography and Physiology to Evolutionary Patterns of Mammalian Diversity and Disparity." Journal of Mammalian Evolution 20, no. 4 (2013): 279–90. https://doi.org/10.5281/zenodo.13431537.

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(Uploaded by Plazi for the Bat Literature Project) Placental mammals occupy a larger morphospace and are taxonomically more diverse than marsupials by an order of magnitude, as shown by quantitative and phylogenetic studies of several character complexes and clades. Many have suggested that life history acts as a constraint on the evolution of marsupial morphology. However, the frequent circumvention of constraints suggests that the pattern of morphospace occupation in marsupials is more a reflection of lack of ecological opportunity than one of biases in the production of variants during deve

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Sánchez-Villagra, Marcelo R. "Why are There Fewer Marsupials than Placentals? On the Relevance of Geography and Physiology to Evolutionary Patterns of Mammalian Diversity and Disparity." Journal of Mammalian Evolution 20, no. 4 (2013): 279–90. https://doi.org/10.5281/zenodo.13431537.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) Placental mammals occupy a larger morphospace and are taxonomically more diverse than marsupials by an order of magnitude, as shown by quantitative and phylogenetic studies of several character complexes and clades. Many have suggested that life history acts as a constraint on the evolution of marsupial morphology. However, the frequent circumvention of constraints suggests that the pattern of morphospace occupation in marsupials is more a reflection of lack of ecological opportunity than one of biases in the production of variants during deve

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31

Sánchez-Villagra, Marcelo R. "Why are There Fewer Marsupials than Placentals? On the Relevance of Geography and Physiology to Evolutionary Patterns of Mammalian Diversity and Disparity." Journal of Mammalian Evolution 20, no. 4 (2013): 279–90. https://doi.org/10.5281/zenodo.13431537.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) Placental mammals occupy a larger morphospace and are taxonomically more diverse than marsupials by an order of magnitude, as shown by quantitative and phylogenetic studies of several character complexes and clades. Many have suggested that life history acts as a constraint on the evolution of marsupial morphology. However, the frequent circumvention of constraints suggests that the pattern of morphospace occupation in marsupials is more a reflection of lack of ecological opportunity than one of biases in the production of variants during deve

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Young, Lauren J., Jessica Gurr, Katrina Morris, Sabine Flenady, and Katherine Belov. "Molecular characterisation of Interleukin-2 in two Australian marsupials (the tammar wallaby, Notamacropus eugenii, and the Tasmanian devil, Sarcophilus harrisii) facilitates the development of marsupial-specific immunological reagents." Australian Mammalogy 41, no. 1 (2019): 39. http://dx.doi.org/10.1071/am17027.

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Interleukin-2 (IL-2) is an important regulator of cellular immunity in mammals. For many years, our inability to identify the expression of this cytokine in marsupials hindered our capacity to progress studies in metatherian immunology. Here, we report the use of molecular techniques to characterise the IL-2 gene for the tammar wallaby (Notamacropus eugenii) and the Tasmanian devil (Sarcophilus harrisii), which allowed the prediction of the structure and probable functions of the IL-2 proteins of these species. Deduced marsupial IL-2 proteins show considerable sequence identity to each other a

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Cruz-Salazar, Bárbara, and Lorena Ruiz-Montoya. "Population viability analysis of common marsupials, Didelphis marsupialis and Didelphis virginiana, in a scenario of constant loss of native vegetation." Mammalia 84, no. 5 (2020): 475–82. http://dx.doi.org/10.1515/mammalia-2019-0130.

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AbstractWe studied the population viability of two common marsupials, Didelphis marsupialis and Didelphis virginiana, based on field data and published ecological and genetic information. Using the VORTEX v. 10. 2.6 program, a 100-year simulation was performed with 1000 iterations for five populations of D. marsupialis and six of D. virginiana. A low probability of extinction was observed in both species, particularly for D. virginiana (0.000–0.007). Population size is higher considering a metapopulation dynamics approach versus individual populations for the two marsupials: 498.25 individuals

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Robinson, ES, MB Renfree, RV Short, and JL VandeBerg. "Mammary glands in male marsupials. 2. Development of teat primordia in Didelphis virginiana and Monodelphis domestica." Reproduction, Fertility and Development 3, no. 3 (1991): 295. http://dx.doi.org/10.1071/rd9910295.

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Young and adults of both sexes of two didelphid marsupials, Didelphis virginiana and Monodelphis domestica, were examined externally for evidence of mammary gland development. Female young possessed teat numbers typical of adult females (13-15 in D. virginiana; 11-13 in M. domestica). Male young showed variable teat numbers which were always low compared with females, with the majority possessing 2-4 in anterior positions. Teats were also present in adult males of both species, in similar numbers and locations to those of young males. There are no previous reports of the presence of teats in a

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Green, Brian, Jim Merchant, and Keith Newgrain. "Milk Composition in the Eastern Quoll, Dasyurus viverrinus (Marsupialia : Dasyuridae)." Australian Journal of Biological Sciences 40, no. 4 (1987): 379. http://dx.doi.org/10.1071/bi9870379.

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The milk constituents of Dasyurus viverrinus, a carnivorous marsupial, exhibited major quantitative and qualitative changes during the course of lactation. The milk produced in the early stages of lactation was dilute, about 13-16070 (w/w) solids before 3 weeks with carbohydrate representing the major fraction. In the latter stages of lactation the milk was concentrated, around 30% solids, and lipid was the predominant fraction. Palmitic acid was the major fatty acid present in early-stage milk but oleic acid became predominant in milk after 10 weeks post-partum. The changes in milk compositio

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36

Castro, Isai Jorge De, Claudia Regina Silva, Arley José Silveira Da Costa, and Ana Carolina Moreira Martins. "Predação oportunista de Artibeus planirostris (Spix, 1823) e Carollia perspicillata (Linnaeus, 1758) (Chiroptera, Phyllostomidae) por marsupiais e anuro na APA do Rio Curiaú, Amapá, Brasil." Acta Amazonica 41, no. 1 (2011): 171–74. https://doi.org/10.5281/zenodo.13457294.

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(Uploaded by Plazi for the Bat Literature Project) We observed three occasional predations of bats captured in mist nets by marsupials and a frog during studies in a várzea forest in the Amapá state. Artibeus planirostris (Spix, 1823) (Chiroptera, Phyllostomidae) was preyed upon by Didelphis marsupialis Linnaeus, 1758 and Philander opossum (Linnaeus, 1758) (Didelphimorphia, Didelphidae). Carollia perspicillata (Linnaeus, 1758) (Chiroptera, Phyllostomidae) was preyed on by Leptodactylus pentadactylus (Laurenti, 1768) (Anura, Leptodactylidae). The bats vocalizations probably attracted the marsup

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37

Castro, Isai Jorge De, Claudia Regina Silva, Arley José Silveira Da Costa, and Ana Carolina Moreira Martins. "Predação oportunista de Artibeus planirostris (Spix, 1823) e Carollia perspicillata (Linnaeus, 1758) (Chiroptera, Phyllostomidae) por marsupiais e anuro na APA do Rio Curiaú, Amapá, Brasil." Acta Amazonica 41, no. 1 (2011): 171–74. https://doi.org/10.5281/zenodo.13457294.

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(Uploaded by Plazi for the Bat Literature Project) We observed three occasional predations of bats captured in mist nets by marsupials and a frog during studies in a várzea forest in the Amapá state. Artibeus planirostris (Spix, 1823) (Chiroptera, Phyllostomidae) was preyed upon by Didelphis marsupialis Linnaeus, 1758 and Philander opossum (Linnaeus, 1758) (Didelphimorphia, Didelphidae). Carollia perspicillata (Linnaeus, 1758) (Chiroptera, Phyllostomidae) was preyed on by Leptodactylus pentadactylus (Laurenti, 1768) (Anura, Leptodactylidae). The bats vocalizations probably attracted the marsup

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38

Castro, Isai Jorge De, Claudia Regina Silva, Arley José Silveira Da Costa, and Ana Carolina Moreira Martins. "Predação oportunista de Artibeus planirostris (Spix, 1823) e Carollia perspicillata (Linnaeus, 1758) (Chiroptera, Phyllostomidae) por marsupiais e anuro na APA do Rio Curiaú, Amapá, Brasil." Acta Amazonica 41, no. 1 (2011): 171–74. https://doi.org/10.5281/zenodo.13457294.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) We observed three occasional predations of bats captured in mist nets by marsupials and a frog during studies in a várzea forest in the Amapá state. Artibeus planirostris (Spix, 1823) (Chiroptera, Phyllostomidae) was preyed upon by Didelphis marsupialis Linnaeus, 1758 and Philander opossum (Linnaeus, 1758) (Didelphimorphia, Didelphidae). Carollia perspicillata (Linnaeus, 1758) (Chiroptera, Phyllostomidae) was preyed on by Leptodactylus pentadactylus (Laurenti, 1768) (Anura, Leptodactylidae). The bats vocalizations probably attracted the marsup

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39

Castro, Isai Jorge De, Claudia Regina Silva, Arley José Silveira Da Costa, and Ana Carolina Moreira Martins. "Predação oportunista de Artibeus planirostris (Spix, 1823) e Carollia perspicillata (Linnaeus, 1758) (Chiroptera, Phyllostomidae) por marsupiais e anuro na APA do Rio Curiaú, Amapá, Brasil." Acta Amazonica 41, no. 1 (2011): 171–74. https://doi.org/10.5281/zenodo.13457294.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) We observed three occasional predations of bats captured in mist nets by marsupials and a frog during studies in a várzea forest in the Amapá state. Artibeus planirostris (Spix, 1823) (Chiroptera, Phyllostomidae) was preyed upon by Didelphis marsupialis Linnaeus, 1758 and Philander opossum (Linnaeus, 1758) (Didelphimorphia, Didelphidae). Carollia perspicillata (Linnaeus, 1758) (Chiroptera, Phyllostomidae) was preyed on by Leptodactylus pentadactylus (Laurenti, 1768) (Anura, Leptodactylidae). The bats vocalizations probably attracted the marsup

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40

Castro, Isai Jorge De, Claudia Regina Silva, Arley José Silveira Da Costa, and Ana Carolina Moreira Martins. "Predação oportunista de Artibeus planirostris (Spix, 1823) e Carollia perspicillata (Linnaeus, 1758) (Chiroptera, Phyllostomidae) por marsupiais e anuro na APA do Rio Curiaú, Amapá, Brasil." Acta Amazonica 41, no. 1 (2011): 171–74. https://doi.org/10.5281/zenodo.13457294.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) We observed three occasional predations of bats captured in mist nets by marsupials and a frog during studies in a várzea forest in the Amapá state. Artibeus planirostris (Spix, 1823) (Chiroptera, Phyllostomidae) was preyed upon by Didelphis marsupialis Linnaeus, 1758 and Philander opossum (Linnaeus, 1758) (Didelphimorphia, Didelphidae). Carollia perspicillata (Linnaeus, 1758) (Chiroptera, Phyllostomidae) was preyed on by Leptodactylus pentadactylus (Laurenti, 1768) (Anura, Leptodactylidae). The bats vocalizations probably attracted the marsup

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41

Sampson, Jordan M., and Robert D. Miller. "Evolution of the Structure and Organization of the Mammalian Immunoglobulin Loci." Journal of Immunology 210, no. 1_Supplement (2023): 224.01. http://dx.doi.org/10.4049/jimmunol.210.supp.224.01.

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Abstract There are three extant lineages of mammals: placentals (e.g. humans and mice), marsupials (e.g. kangaroos and opossums), and monotremes (e.g. platypus). Of the three lineages, the marsupials are unusually and uniformly limited in their immunoglobulin heavy chain (IgH) isotype content. All marsupials studied have only one IgM, IgG, IgE, and IgA and lack IgD. Comparatively, there is a greater complexity of IgH isotypes and subclasses in both placentals and monotremes. Marsupials also have a greater complexity in their light (L) chain V genes than IgH chains. Transposable elements (TEs),

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Kumar, Satish, Erica M. De Leon, Jose Granados, Deanne J. Whitworth, and John L. VandeBerg. "Monodelphis domestica Induced Pluripotent Stem Cells Reveal Metatherian Pluripotency Architecture." International Journal of Molecular Sciences 23, no. 20 (2022): 12623. http://dx.doi.org/10.3390/ijms232012623.

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Marsupials have been a powerful comparative model to understand mammalian biology. However, because of the unique characteristics of their embryology, marsupial pluripotency architecture remains to be fully understood, and nobody has succeeded in developing embryonic stem cells (ESCs) from any marsupial species. We have developed an integration-free iPSC reprogramming method and established validated iPSCs from two inbred strains of a marsupial, Monodelphis domestica. The monoiPSCs showed a significant (6181 DE-genes) and highly uniform (r2 [95% CI] = 0.973 ± 0.007) resetting of the cellular t

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43

Koenigswald von, Wighart, and Francisco Goin. "Enamel differentiation in South American marsupials and a comparison of placental and marsupial enamel." Palaeontographica Abteilung A 255, no. 4-6 (2000): 129–68. http://dx.doi.org/10.1127/pala/255/2000/129.

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De Dios, Krisel, Sachin Kumar, Ehsan Alvandi, Utpal Kumar Adhikari, Monique Amtoinette David, and Mourad Tayebi. "Phylogeny and Molecular Characterisation of PRNP in Red-Tailed Phascogale (Phascogale calura)." Brain Sciences 15, no. 3 (2025): 250. https://doi.org/10.3390/brainsci15030250.

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Background/Objectives: The normal cellular prion protein (PrPC) is a cell-surface glycoprotein, mainly localised in neurons of the central nervous system (CNS). The human PRNP gene encodes 253 amino acid residues of precursor PrPC. Several studies that investigated the role of PRNP and PrPC in placental mammals, such as humans and mice, failed to reveal its exact function. Methods: In this study, we sequenced and characterised the PRNP gene and PrPC of the marsupial, P. calura, as a strategy to gain molecular insights into its structure and physicochemical properties. Placentals are separated

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45

Pevsner, Spencer K., David M. Grossnickle, and Zhe-Xi Luo. "The functional diversity of marsupial limbs is influenced by both ecology and developmental constraint." Biological Journal of the Linnean Society 135, no. 3 (2022): 569–85. http://dx.doi.org/10.1093/biolinnean/blab168.

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Abstract Extant marsupials are less ecologically diverse than placentals, and this is reflected by placentals exhibiting a greater diversity of locomotor modes, including powered flight and fully aquatic swimming. One proposed explanation for this discrepancy is that the development of more disparate marsupial forelimbs is prevented by the neonate’s crawl to the pouch, which requires precocious forelimb development for climbing adaptations. To test predictions of this Developmental Constraint Hypothesis (DCH), we pursue a comparative morphometric study on osteological traits of mammalian limbs

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46

Deakin, Janine E., and Sally Potter. "Marsupial chromosomics: bridging the gap between genomes and chromosomes." Reproduction, Fertility and Development 31, no. 7 (2019): 1189. http://dx.doi.org/10.1071/rd18201.

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Marsupials have unique features that make them particularly interesting to study, and sequencing of marsupial genomes is helping to understand their evolution. A decade ago, it was a huge feat to sequence the first marsupial genome. Now, the advances in sequencing technology have made the sequencing of many more marsupial genomes possible. However, the DNA sequence is only one component of the structures it is packaged into: chromosomes. Knowing the arrangement of the DNA sequence on each chromosome is essential for a genome assembly to be used to its full potential. The importance of combinin

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Soares, Manoel do Carmo P., Gilberta Bensabath, and Amélia P. A. Travassos da Rosa. "The presence of antibodies for hepatitis a virus in amazonia Didelphis marsupialis (Vertebrata, Marsupialia)." Revista do Instituto de Medicina Tropical de São Paulo 29, no. 2 (1987): 110–11. http://dx.doi.org/10.1590/s0036-46651987000200008.

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Anti-HAV was detected by enzyme - immunoassay in sera collected from 6 (18,75%) of 32 Didelphis marsupialis trapped in the Amazon region. No anti-HAV were found in the sera from 136 other wild animals, including small rodents, reptiles and other marsupials.

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Cooper, DW, PG Johnston, JL Vandeberg, and ES Robinson. "X-Chromosome Inactivation in Marsupials." Australian Journal of Zoology 37, no. 3 (1989): 411. http://dx.doi.org/10.1071/zo9890411.

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Marsupial (metatherian) mammals resemble their eutherian ('placental') counterparts in having inacti- vation of one of the two X chromosomes in the soma and premeiotic germ cells of their females. The marsupial X-inactivation system differs from the eutherian system in two respects: firstly, inactivation occurs for the paternally derived allele, i.e. it is not random, and secondly it is often incomplete. Data are available for four X-linked loci, all controlling enzyme structure: glucose-6- phosphate dehydrogenase (G6PD), phosphoglycerate kinase 1 (PGKl), alpha-galactosidase (GLA) and hypoxant

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Rodger, JC. "Prospects for the Artificial Manipulation of Marsupial Reproduction and Its Application in Research and Conservation." Australian Journal of Zoology 37, no. 3 (1989): 249. http://dx.doi.org/10.1071/zo9890249.

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Techniques to manipulate reproduction and productivity are well established features of the husbandry of domestic animals and the treatment of human infertility. Similar approaches are feasible in marsupials, but little work has been done to apply our considerable basic knowledge of marsupial reproduction to produce practical artificial breeding. If the reproduction and productivity of marsupials could be more effectively controlled it would greatly aid research and profoundly change both current practice in the management of zoo animals, and the strategies employed for the breeding and conser

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Graves, Jennifer A. Marshall. "Kangaroo gene mapping and sequencing: insights into mammalian genome evolution." Australian Journal of Zoology 61, no. 1 (2013): 4. http://dx.doi.org/10.1071/zo13002.

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The deep divergence of marsupials and eutherian mammals 160 million years ago provides genetic variation to explore the evolution of DNA sequence, gene arrangement and regulation of gene expression in mammals. Following the pioneering work of Professor Desmond W. Cooper, emerging techniques in cytogenetics and molecular biology have been adapted to characterise the genomes of kangaroos and other marsupials. In particular, genetic and genomic work over four decades has shown that marsupial sex chromosomes differ significantly from the eutherian XY chromosome pair in their size, gene content and

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