Log in

Relevant bibliographies by topics / Peristomium / Journal articles

To see the other types of publications on this topic, follow the link: Peristomium.

Journal articles on the topic 'Peristomium'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Peristomium.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

DEAN, HARLAN K., and JAMES A. BLAKE. "Monticellina (Polychaeta: Cirratulidae) from the Pacific coast of Costa Rica with descriptions of six new species." Zoosymposia 2, no. 1 (2009): 105–26. http://dx.doi.org/10.11646/zoosymposia.2.1.10.

Full text

Abstract:

Eight species of Monticellina are described from intertidal and subtidal sites on the Pacific coast of Costa Rica. Six of these species, M. acunai sp. nov., M. antelaxa sp. nov., M. carrikeri sp. nov., M. elongata sp. nov., M. giribeti sp. nov., and M. setosa sp. nov. are new to science while M. cryptica Blake, 1996 and M. tesselata (Hartman, 1960) have been previously described from California. M. acunai sp. nov. has a wide prostomium, a peristomium with four annulations and denticulate capillary setae with numerous well-developed teeth in both the notopodium and neuropodium. M. antelaxa sp.

APA, Harvard, Vancouver, ISO, and other styles

2

Fukuda, Marcelo V., Gustavo Yunda-Guarin, and João M. M. Nogueira. "The genusProsphaerosyllis(Polychaeta: Syllidae: Exogoninae) in Brazil, with description of a new species." Journal of the Marine Biological Association of the United Kingdom 89, no. 7 (2009): 1443–54. http://dx.doi.org/10.1017/s0025315409000095.

Full text

Abstract:

In studies carried out off the north-eastern and south-eastern coast of Brazil, three species ofProsphaerosylliswere found:P. isabellae, which was already recorded for Brazilian waters;P. xarifae, a newly recorded species for the area; and P.brachycephalasp. nov., a new to science species.Prosphaerosyllis brachycephalasp. nov., is characterized by having swollen anterior part of the body, prostomium retractable within the peristomium and anterior segments, short antennae, short peristomial and dorsal cirri, and falcigers with short, unidentate blades throughout. All these species are herein de

APA, Harvard, Vancouver, ISO, and other styles

3

CHOI, HYUN KI, TAE WON JUNG, and SEONG MYEONG YOON. "Two new species of Aphelochaeta (Annelida: Polychaeta: Cirratulidae) from Korean waters." Zootaxa 4504, no. 4 (2018): 586. http://dx.doi.org/10.11646/zootaxa.4504.4.9.

Full text

Abstract:

Two new cirratulid polychaetes of the genus Aphelochaeta collected from Korean waters are reported here along with detailed descriptions and illustrations. Aphelochaeta petila n. sp. is readily distinguished from its congeners by the following characteristics: non-expanded anterior and posterior ends of the body; non-moniliform segments in the abdomen; peristomium with three annulations and an indistinct dorsal crest; both the dorsal tentacles and the first branchiae attached on the peristomium; presence of only a pair of branchiae on chaetiger 1; and the ventrum of the thoracic region with tr

APA, Harvard, Vancouver, ISO, and other styles

4

DONER, STACY A., and JAMES A. BLAKE. "Two new species of Aphelochaeta (Polychaeta: Cirratulidae) from deep water off northern California." Zoosymposia 2, no. 1 (2009): 127–37. http://dx.doi.org/10.11646/zoosymposia.2.1.11.

Full text

Abstract:

Two new species belonging to the genus Aphelochaeta (Polychaeta: Cirratulidae) are described from continental slope sediments off northern California. Specimens were collected during extensive monitoring of the San Francisco Deep Ocean Disposal Site off the Farallon Islands from 1996 to 2004. The genus Aphelochaeta is one of the more speciose genera collected from depths of 2400–3200 m. A. bullata sp. nov. is characterized by the presence of four peristomial annulations, a pronounced dorsal crest, and elongated, natatory-like simple capillaries in the noto- and neuropodia of the thoracic regio

APA, Harvard, Vancouver, ISO, and other styles

5

ÁLVAREZ-CAMPOS, PATRICIA, GUILLERMO SAN MARTÍN, and M. TERESA AGUADO. "The genus Branchiosyllis Ehlers, 1887 from Philippines Islands, with the description of two new species." Zootaxa 3542, no. 1 (2012): 49. http://dx.doi.org/10.11646/zootaxa.3542.1.2.

Full text

Abstract:

The species of Branchiosyllis from Philippines Islands, B. maculata, B. australis new comb. and B. exilis, have been re-viewed, with particular emphasis on the study of worldwide material of the latter. In addition, Branchiosyllis mayae andBranchiosyllis tagalog are described as new species. The former is characterized by its bidentate claw-shaped chaetae,unique in the genus, short dorsal cirri, and orange body with black stripes on prostomium (less pigmented), peristomiun,and anterior four to seven segments (more pigmented at bases of cirrophores). The latter is characterized by presence ofon

APA, Harvard, Vancouver, ISO, and other styles

6

Gagaev, S. Yu. "A new species the genus Chaetozone (Annelida: Cirratulidae) from the seaward part of Chaunskaya Bay in the East Siberian Sea (Russia)." Zoosystematica Rossica 33, no. 2 (2024): 237–43. http://dx.doi.org/10.31610/zsr/2024.33.2.237.

Full text

Abstract:

Based on material collected by the author over several years and seasons in Chaunskaya Bay of the East Siberian Sea, a new species, Chaetozone buzhinskajae sp. nov., is described. Morphologically, it is most similar to Ch. setosa Malmgren, 1867 and Ch. pugettensis Blake, 2015, which belong to a group of species characterised by an enlarged lobe or crest covering the peristomium. The new species is distinguished by the presence of neuropodial spines in the anterior part of the last third of the body (from the 48th to the 72nd setigerous segment), a complete achaetous segment that is well separa

APA, Harvard, Vancouver, ISO, and other styles

7

Gagaev, Sergey Yu. "A new species the genus Chaetozone (Annelida: Cirratulidae) from the seaward part of Chaunskaya Bay in the East Siberian Sea (Russia)." Zoosystematica Rossica 33, no. 2 (2024): 237–43. https://doi.org/10.31610/zsr/2024.33.2.237.

Full text

Abstract:

Based on material collected by the author over several years and seasons in Chaunskaya Bay of the East Siberian Sea, a new species, <em>Chaetozone buzhinskajae</em> <strong>sp. nov.</strong>, is described. Morphologically, it is most similar to <em>Ch. setosa</em> Malmgren, 1867 and <em>Ch. pugettensis</em> Blake, 2015, which belong to a group of species characterised by an enlarged lobe or crest covering the peristomium. The new species is distinguished by the presence of neuropodial spines in the anterior part of the last third of the body (from the 48th to the 72nd

APA, Harvard, Vancouver, ISO, and other styles

8

Brinkhurst, R. O., and D. McKey-Fender. "The anatomy of the pharynx of two predatory aquatic oligochaetes." Canadian Journal of Zoology 69, no. 3 (1991): 669–75. http://dx.doi.org/10.1139/z91-098.

Full text

Abstract:

The genera Haplotaxis (Haplotaxidae) and Phagodrilus (Lumbriculidae) have convergent modifications of the pharynx that are adaptations for ingesting prey, especially other oligochaetes. Neither these taxa nor the predatory lumbriculid Agriodrilus (which is not closely related to Phagodrilus within that family) need be considered to be directly related to the leeches or branchiobdellidans simply because of these modifications. The commensal and predatory life style has evolved quite independently in several oligochaetes. Haplotaxis does not have a furrow across the prostomium as previously desc

APA, Harvard, Vancouver, ISO, and other styles

9

Elías, Rodolfo, and María S. Rivero. "Two new species of Caulleriella (Polychaeta, Cirratulidae) from Argentina." Iheringia. Série Zoologia 98, no. 2 (2008): 225–30. http://dx.doi.org/10.1590/s0073-47212008000200010.

Full text

Abstract:

Caulleriella bremecae and C. galeanoi (Polychaeta: Cirratulidae) are newly described from Mar del Plata, Argentina (38ºS, 57ºW). Both species have small, red-pigmented nuchal organs (lateral "eyes") on the prostomium. Caulleriella bremecae sp. nov. is further characterized by a peristomium without annulations except for a narrow anterior dorsal fold, posterior part of peristomium extending posterodorsally over chaetiger 1, latter extending posterodorsally over chaetiger 2 and with slightly separated grooved palps arising middorsally; notochaetae of chaetigers 1-23 all smooth capillaries, there

APA, Harvard, Vancouver, ISO, and other styles

10

Elias, R., M. S. Rivero, and J. M. Lobo Orensanz. "New species ofMonticellinaandChaetozone(Polychaeta: Cirratulidae) in the SW Atlantic, and a review ofMonticellinaspecies." Journal of the Marine Biological Association of the United Kingdom 97, no. 7 (2016): 1553–63. http://dx.doi.org/10.1017/s0025315416000771.

Full text

Abstract:

During quantitative surveys two new species of Cirratulidae from subtidal bottoms of the Atlantic coast of Argentina were collected. They belong to the generaMonticellinaandChaetozone. Monticellina moraesp. nov. is characterized by the presence of a long peristomium of smooth appearance, but triannulated at SEM, bearing the dorsal tentacles in the posterior part, with the first pair of branchiae posterolateral to the dorsal tentacles in chaetiger 1. The body is divided into three parts, an anterior region laterally expanded and with crowded segments, a middle region with beadlike chaetigers an

APA, Harvard, Vancouver, ISO, and other styles

11

Costa-Paiva, Elisa M., and Paulo C. Paiva. "A morphometric analysis of Eunice Cuvier (Annelida, Polychaeta) species." Revista Brasileira de Zoologia 24, no. 2 (2007): 353–58. http://dx.doi.org/10.1590/s0101-81752007000200013.

Full text

Abstract:

Morphology has been the subject of several studies in Eunice specially in the context of the taxonomy and evolutionary relationships of taxa within this genus. In this study we opt for a morphometric approach comparing five species of Eunice to assess if it was possible to delimitate them by shape variables. The morphology of E.fucata, E.insularis, E. cf. ornata, E.rubra, and Eunice sp. was compared using traditional morphometric analysis of 16 measured variables. After removing the size-effect, a Canonical Variates Analysis applied to morphometric variables was able to discriminate all specie

APA, Harvard, Vancouver, ISO, and other styles

12

Sikorski, Andrey, Laetitia M. Gunton, and Lyudmila Pavlova. "Laonicespecies (Polychaeta, Spionidae) from the Whittard Canyon (NE Atlantic) with descriptions of two new species." Journal of the Marine Biological Association of the United Kingdom 97, no. 5 (2017): 961–73. http://dx.doi.org/10.1017/s0025315417000480.

Full text

Abstract:

Four species ofLaonice(Annelida: Spionidae) were collected from the lower bathyal depths (3300–3700 m) in the Whittard Canyon, NE Atlantic. Two are herewith described as new species:Laonice whittardensissp. nov. andLaonice nataesp. nov. The other two areLaonice blakeiSikorski & Jirkov, 1988 andLaonice magnacristataMaciolek, 2000.Laonice whittardensishas genital pouches appearing from chaetiger 3, prostomium free of peristomium and bidentate hooks.Laonice nataebelongs to the subgenusAppelloefianov. with prostomium distinct from the peristomium, more than two vertical rows of capillaries in

APA, Harvard, Vancouver, ISO, and other styles

13

GIANGRANDE, ADRIANA, MARGHERITA LICCIANO, and LUCA CASTRIOTA. "Description of Chone usticensis sp. nov. (Polychaeta, Sabellidae) from the Mediterranean Sea." Zootaxa 1168, no. 1 (2006): 51. http://dx.doi.org/10.11646/zootaxa.1168.1.5.

Full text

Abstract:

A new species of Chone (Sabellidae) from the coast of Ustica Island (Mediterranean Sea, north of Sicily) is described. The species, named Chone usticensis sp. nov., is similar to another Mediterranean species, C. filicaudata, in having a long pygidial filiform appendage, but is distinct from this species especially in the peristomium, collar, and in thoracic paleate chaetae shape. A discussion on the presence of the radiolar appendages within the genus Chone is also given.

APA, Harvard, Vancouver, ISO, and other styles

14

MANDAL, SUMIT, SADANAND N. HARKANTRA, and SERGIO I. SALAZAR-VALLEJO. "Cabira rangarajani n. sp. (Polychaeta: Pilargidae) from the Goa coast, central west coast of India." Zootaxa 1446, no. 1 (2007): 21–29. http://dx.doi.org/10.11646/zootaxa.1446.1.2.

Full text

Abstract:

Cabira rangarajani n. sp., is described from the Goa coast, in central west coast of India. It differs from C. brevicirris (Rangarajan, 1964), by having a single type of neurochaetae while the other species has three types. The new species also differs from the type species, C. incerta Webster, 1879 with regards to the relative length of the fused prostomium and peristomium, size of the palps and antennae and in having relatively smaller anterior appendages. A key to identify all species in the genus is also included.

APA, Harvard, Vancouver, ISO, and other styles

15

Kolbasova, Glafira D., and Alexander B. Tzetlin. "Developmental studies of the enigmatic wormCaobangia billetiGiard, 1893 (Annelida; Sabellidae), a symbiont of freshwater snails." Journal of the Marine Biological Association of the United Kingdom 97, no. 5 (2017): 1143–53. http://dx.doi.org/10.1017/s0025315417000777.

Full text

Abstract:

Caobangiids are an aberrant group of annelids with an unusual phoronid-like body plan. The most perceptible anatomical characteristic of caobangiids is the anal trunk, which is recurved outside the body and ends with an anal opening located near the head. So far neither the larval development nor the metamorphosis of these worms have been investigated thoroughly. This study describes the larval development and metamorphosis ofCaobangia billeti, and focuses mainly on the formation of the alimentary tract. The trochophore has eight chaetigers. Embryogenesis includes the development of segmentall

APA, Harvard, Vancouver, ISO, and other styles

16

Farrell, Úna C., and Derek E. G. Briggs. "A pyritized polychaete from the Devonian of Ontario." Proceedings of the Royal Society B: Biological Sciences 274, no. 1609 (2006): 499–504. http://dx.doi.org/10.1098/rspb.2006.0063.

Full text

Abstract:

A polychaete from the Middle Devonian Arkona Shale at Hungry Hollow, Arkona, Ontario is preserved in three dimensions in pyrite. The prostomium bears a single median antenna, a pair of lateral antennae and a pair of ventral palps. It is assumed to be fused to a reduced peristomium. The anteriormost three pairs of trunk appendages are modified as tentacular cirri, the third long and biramous. The remainder of the finely annulated trunk bears at least 21 similar biramous parapodia, some of which preserve evidence of chaetae. The postsegmental pygidium is very small and may bear up to two pairs o

APA, Harvard, Vancouver, ISO, and other styles

17

Estrella-Ruiz, Alejandra, Pablo Hernández-Alcántara, and Vivianne Solís-Weiss. "Description of a new species of Hirsutonuphis (Annelida: Onuphidae) from the Mexican Pacific, with notes on the world distribution of the genus." Journal of the Marine Biological Association of the United Kingdom 93, no. 7 (2013): 1777–83. http://dx.doi.org/10.1017/s0025315413000441.

Full text

Abstract:

A new species of Hirsutonuphis (Annelida: Onuphidae) is described from the continental shelf of the Gulf of California, Mexican Pacific. Hirsutonuphis paxtonae sp. nov. is easily distinguished from eight previously described species belonging to this genus, by the bi- and tri-dentate pseudocompound hooded falcigers on the first 5–6 chaetigers, the pectinate chaetae from chaetigers 6–11, the bidentate subacicular hooded hooks from chaetigers 18–21, and its colour pattern: a dark transverse band in the dorsal part of the peristomium and on each chaetiger, which gradually fades from chaetigers 12

APA, Harvard, Vancouver, ISO, and other styles

18

Ruta, Christine, Davi Moreira Mundim, Roberta Freitas, and Rannyele P. Ribeiro. "New species and record of Dodecaceria (Annelida: Cirratulidae) the Biological Reserve of Rocas Atoll, Brazil, the only atoll in the South Atlantic Ocean." PLOS ONE 18, no. 10 (2023): e0293087. http://dx.doi.org/10.1371/journal.pone.0293087.

Full text

Abstract:

The polychaete Family Cirratulidae is one of the most abundant and diverse groups of Annelida, although it remains poorly known worldwide. Dodecaceria Ørsted, 1843 is one of the least described genera of Cirratulidae. The present report is the first taxonomic study of the genus Dodecaceria for the Brazilian coast. Cirratulidae were collected at Rocas Atoll, the first Brazilian marine protected area and the only atoll in the South Atlantic Ocean. We described one new species, Dodecaceria zelinhae n. sp., and a new record of D. dibranchiata Blake & Dean, 2019, previously only known from Pana

APA, Harvard, Vancouver, ISO, and other styles

19

Lee, Geon Hyeok, Karin Meißner, Seong Myeong Yoon, and Gi-Sik Min. "New species of the genus Spio (Annelida, Spionidae) from the southern and western coasts of Korea." ZooKeys 1070 (November 15, 2021): 151–64. http://dx.doi.org/10.3897/zookeys.1070.73847.

Full text

Abstract:

A new spionid polychaete, Spio pigmentatasp. nov., is described from the southern and western coasts of Korea. This new species differs from its congeners by the combination of the following morphological characteristics: the presence of orange-brown pigmentation on the anterior part of the prostomium, black pigmentation on the peristomium and along the body, U-shaped nuchal organs, a comparatively long extension of metameric dorsal ciliated organs, three pairs of white dots per chaetiger, two to three posterior abranchiate chaetigers, and the presence of tridentate neuropodial hooded hooks. T

APA, Harvard, Vancouver, ISO, and other styles

20

Lee, Geon Hyeok, Karin Meißner, Seong Myeong Yoon, and Gi-Sik Min. "New species of the genus Spio (Annelida, Spionidae) from the southern and western coasts of Korea." ZooKeys 1070 (November 15, 2021): 151–64. https://doi.org/10.3897/zookeys.1070.73847.

Full text

Abstract:

A new spionid polychaete, Spio pigmentata sp. nov., is described from the southern and western coasts of Korea. This new species differs from its congeners by the combination of the following morphological characteristics: the presence of orange-brown pigmentation on the anterior part of the prostomium, black pigmentation on the peristomium and along the body, U-shaped nuchal organs, a comparatively long extension of metameric dorsal ciliated organs, three pairs of white dots per chaetiger, two to three posterior abranchiate chaetigers, and the presence of tridentate neuropodial hooded hooks.

APA, Harvard, Vancouver, ISO, and other styles

21

DEAN, HARLAN K., and JAMES A. BLAKE. "Chaetozone and Caulleriella (Polychaeta: Cirratulidae) from the Pacific Coast of Costa Rica, with description of eight new species." Zootaxa 1451, no. 1 (2007): 41–68. http://dx.doi.org/10.11646/zootaxa.1451.1.2.

Full text

Abstract:

Polychaetes of the family Cirratulidae have often been poorly understood yet are very common and important components of intertidal and subtidal benthic communities. Five species of Chaetozone are here described from the Pacific coast of Costa Rica. Three of these species, C. acuminata sp. nov., C. cimar sp. nov., and C. nicoyana sp. nov., are new to science while C. corona Berkeley & Berkeley, 1941 and C. hedgpethi Blake, 1996 were previously described from California. C. acuminata sp. nov. has an elongate peristomium, a narrow anterior body region and elongate unidentate spines; the uppe

APA, Harvard, Vancouver, ISO, and other styles

22

Choi, Hyun Ki, Hana Kim, and Seong Myeong Yoon. "Timarete posteria, a new cirratulid species from Korea (Annelida, Polychaeta, Cirratulidae)." ZooKeys 806 (December 13, 2018): 1–15. http://dx.doi.org/10.3897/zookeys.806.27436.

Full text

Abstract:

A new cirratulid species,Timareteposteriasp. n., is described from the intertidal habitats of the eastern coast of South Korea. The new species is closely related toTimareteluxuriosa(Moore, 1904) from southern California based on morphological similarity of the branchial and tentacular finalents and the noto- and neuropodial spines. However,T.posteriasp. n.differs from the latter based on the following characteristics: 1) evenly divided peristomium into three annulations; 2) 2–4 neuropodial spines originating in the posterior chaetigers alternated by a few capillaries; and 3) complete shift in

APA, Harvard, Vancouver, ISO, and other styles

23

Aguirre, Luis, Guillermo San Martín, and Patricia Álvarez-Campos. "Autolytinae from Peru: description of Myrianida paredesi sp. nov. and new records of Myrianida pentadentata (Imajima, 1966), and Proceraea micropedata (Hartmann-Schröder, 1962)." Journal of the Marine Biological Association of the United Kingdom 96, no. 8 (2015): 1633–49. http://dx.doi.org/10.1017/s0025315415002015.

Full text

Abstract:

A new species, Myrianida paredesi, and new records of Myrianida pentadentata (Imajima, 1966), and Procerarea micropedata (Hartmann-Schöder, 1962), are described from the central coast of Peru. Myrianida paredesi is characterized by the presence of an additional mid-dorsal, digitiform structure, quite similar to a dorsal cirrus (unique among all syllids), a subtriangular prostomium with a posterior region extended to middle peristomium, pharynx with a single elongated sinuation and a trepan with 14–15 equal teeth in a single ring. Descriptions of male and female stolons are also provided. The p

APA, Harvard, Vancouver, ISO, and other styles

24

Choi, Hyun Ki, Hana Kim, and Seong Myeong Yoon. "Timarete posteria, a new cirratulid species from Korea (Annelida, Polychaeta, Cirratulidae)." ZooKeys 806 (December 13, 2018): 1–15. https://doi.org/10.3897/zookeys.806.27436.

Full text

Abstract:

A new cirratulid species, Timarete posteria sp. n., is described from the intertidal habitats of the eastern coast of South Korea. The new species is closely related to Timarete luxuriosa (Moore, 1904) from southern California based on morphological similarity of the branchial and tentacular finalents and the noto- and neuropodial spines. However, T. posteria sp. n. differs from the latter based on the following characteristics: 1) evenly divided peristomium into three annulations; 2) 2–4 neuropodial spines originating in the posterior chaetigers alternated by a few capillaries; and 3) complet

APA, Harvard, Vancouver, ISO, and other styles

25

Zhou, Yadong, Ruiyan Zhang, Chengcheng Shen, Qin Mao, Mouyingke Zhang, and Dongsheng Zhang. "Ambusher in sponge: a new species of Eunice (Annelida, Eunicidae) commensal within deep-sea Farreidae (Porifera, Hexactinellida) on northwest Pacific seamounts." ZooKeys 1230 (March 5, 2025): 25–36. https://doi.org/10.3897/zookeys.1230.140329.

Full text

Abstract:

Deep-sea sponges create complex biogenic structures and attract a wide array of deep-sea organisms, including symbionts. In this study, we describe Eunice siphoninsidiatorsp. nov., a new eunicid species living in the central cavity of deep-sea farreid glass sponges found on northwest Pacific seamounts. The new species closely resembles the Atlantic Eunice norvegica both morphologically and molecularly, but it differs in the relative length of palp compared to peristomium, starting points of subacicular hooks, and shape of pectinate chaetae. A 13% COI genetic distance between the two species fu

APA, Harvard, Vancouver, ISO, and other styles

26

Zhou, Yadong, Ruiyan Zhang, Chengcheng Shen, Qin Mao, Mouyingke Zhang, and Dongsheng Zhang. "Ambusher in sponge: a new species of Eunice (Annelida, Eunicidae) commensal within deep-sea Farreidae (Porifera, Hexactinellida) on northwest Pacific seamounts." ZooKeys 1230 (March 5, 2025): 25–36. https://doi.org/10.3897/zookeys.1230.140329.

Full text

Abstract:

Deep-sea sponges create complex biogenic structures and attract a wide array of deep-sea organisms, including symbionts. In this study, we describe <i>Eunice siphoninsidiator</i> sp. nov., a new eunicid species living in the central cavity of deep-sea farreid glass sponges found on northwest Pacific seamounts. The new species closely resembles the Atlantic <i>Eunice norvegica</i> both morphologically and molecularly, but it differs in the relative length of palp compared to peristomium, starting points of subacicular hooks, and shape of pectinate chaetae. A 13% <i>COI</i> genetic distance betw

APA, Harvard, Vancouver, ISO, and other styles

27

GREAVES, ELIZABETH, KARIN MEIßNER, and ROBIN WILSON. "New Laonice species (Polychaeta: Spionidae) from western and northern Australia." Zootaxa 2903, no. 1 (2011): 1. http://dx.doi.org/10.11646/zootaxa.2903.1.1.

Full text

Abstract:

Species belonging to the genus Laonice (Polychaeta: Spionidae) from continental shelf and slope depths off western and northern Australia are described. Three species are new to science (L. lemniscata, L. insolita, L. pectinata), two additional species of uncertain identity are recognised from incomplete material and are similar to existing species. A key is provided to allow identification of all six Laonice species known from Australia. Also, a new standard for the observation of hooded hooks in Laonice is established. One of the Australian species, L. quadridentata, belongs to a group of La

APA, Harvard, Vancouver, ISO, and other styles

28

DELGADO-BLAS, VÍCTOR HUGO, OSCAR DÍAZ-DÍAZ, and NICOLÁS ROZBACZYLO. "Laonice Malmgren, 1867 (Annelida: Spionidae) from the Aysén region in southern Chile with description of a new species." Zootaxa 5551, no. 1 (2024): 157–66. https://doi.org/10.11646/zootaxa.5551.1.7.

Full text

Abstract:

Specimens of Laonice collected from southern Chile were examined, and one new species was described. Laonice ayseniensis sp. nov. is characterized by having an anteriorly fused prostomium and peristomium, giving a bicornate, cap-shaped appearance; nuchal organs and caruncle extending up to chaetigers 14–16; very small, subtriangular first notopodial postchaetal lamellae, shorter than the neuropodial lamellae; leaf-like notopodial postchaetal lamellae in the branchial region, with pairs 4, 13, and 14 larger and wider than the other pairs; very low dorsal transverse ridges on chaetigers 37–48; t

APA, Harvard, Vancouver, ISO, and other styles

29

Bhaud, M. R., and M. A. V. Petti. "Spiochaetopterus nonatoi, a new species of Chaetopteridae (Polychaeta) from Brazil: biogeographical consequences." Journal of the Marine Biological Association of the United Kingdom 81, no. 2 (2001): 225–34. http://dx.doi.org/10.1017/s002531540100368x.

Full text

Abstract:

A new species Spiochaetopterus nonatoi is described from the south-eastern coast of Brazil, the type locality being Flamengo Bight, 6-m depth (23°30′S 45°06′W). This species is distinguishable from already erected species of the same genus by the following characteristics: oculate specimens of large size; maximum segments, 197 (N=15); maximum tube length, 45 cm; maximum body length, 20 cm; orange coloration of the fore part (peristomium and segment 1) and of the ventral shield on segments 6–7; shape of the specialized enlarged cutting seta on A4 with an obliquely truncated distal end; this sli

APA, Harvard, Vancouver, ISO, and other styles

30

Tovar-Hernández, María Ana, and Harlan Dean. "A new gregarious sabellid worm from the Gulf of California reproducing by spontaneous fission (Polychaeta, Sabellidae)." Journal of the Marine Biological Association of the United Kingdom 94, no. 5 (2014): 935–46. http://dx.doi.org/10.1017/s0025315414000186.

Full text

Abstract:

A new species of the sabellid genusPseudobranchiommais described from 50 cm depth in dock fouling from the southern Gulf of California.Pseudobranchiomma schizogenicasp. nov., belongs to a group of six species characterized by having radiolar serrations extending for most of the radiolar length. The new species is characterized by the presence of a unique set of features related to the covering of the peristomium by lateral collar margins, the shape of the first ventral shield, the size of interramal eyespots, and the width of the hood of thoracic and abdominal spinelike chaetae. Information ab

APA, Harvard, Vancouver, ISO, and other styles

31

Parry, Luke, Jakob Vinther, and Gregory D. Edgecombe. "Cambrian stem-group annelids and a metameric origin of the annelid head." Biology Letters 11, no. 10 (2015): 20150763. http://dx.doi.org/10.1098/rsbl.2015.0763.

Full text

Abstract:

The oldest fossil annelids come from the Early Cambrian Sirius Passet and Guanshan biotas and Middle Cambrian Burgess Shale. While these are among the best preserved polychaete fossils, their relationship to living taxa is contentious, having been interpreted either as members of extant clades or as a grade outside the crown group. New morphological observations from five Cambrian species include the oldest polychaete with head appendages, a new specimen of Pygocirrus from Sirius Passet, and an undescribed form from the Burgess Shale. We propose that the palps of Canadia are on an anterior seg

APA, Harvard, Vancouver, ISO, and other styles

32

Saracho Bottero, M. Andrea, Rodolfo Elias, and Wagner F. Magalhães. "Taxonomic revision of Cirratulus (Polychaeta: Cirratulidae) from the coasts of Argentina, with description of a new species." Journal of the Marine Biological Association of the United Kingdom 97, no. 5 (2017): 889–96. http://dx.doi.org/10.1017/s0025315417000807.

Full text

Abstract:

Among the polychaetes, the family Cirratulidae is one of the most challenging taxonomically because most of the currently used diagnostic characters change during ontogeny. It is therefore necessary to use a combination of characters to make an accurate identification. The present work is the first of a planned revision of the genus Cirratulus from coastal zones of Argentina. The examined material came from the two largest natural history museums of the country, and showed several morphotypes. Some specimens corresponded to described species, but others were undoubtedly undescribed. Among the

APA, Harvard, Vancouver, ISO, and other styles

33

MAGALHÄES, WAGNER F., and JUSTIN HILLIARD. "Two new deep-sea species of Capitella (Annelida: Capitellidae) from sunken wood in the Northeast Pacific." Zootaxa 5125, no. 2 (2022): 229–40. http://dx.doi.org/10.11646/zootaxa.5125.2.7.

Full text

Abstract:

Natural and experimental wood falls harbor a rich and abundant macrofaunal community in the deep-sea. Two undescribed capitellids have been collected from wood species bundles deployed at 3,100 m at the “Deadwood 2” site in Monterey Bay and several other locations in the northeastern Pacific. Capitella blakei sp. nov. is a widely distributed deep-sea capitellid in the northeastern Pacific occurring from the Monterey canyon north to the Endeavour segment of the San Juan de Fuca Ridge, a range of almost 1,400 km. It belongs to a group of Capitella species having only individuals with male extern

APA, Harvard, Vancouver, ISO, and other styles

34

Jimi, Naoto, Shinta Fujimoto, Yoshihiro Fujiwara, Kohei Oguchi, and Toru Miura. "Four new species of Ctenodrilus, Raphidrilus, and Raricirrus (Cirratuliformia, Annelida) in Japanese waters, with notes on their phylogenetic position." PeerJ 10 (March 8, 2022): e13044. http://dx.doi.org/10.7717/peerj.13044.

Full text

Abstract:

Four new species of annelids, Ctenodrilus japonicus sp. nov., Raphidrilus misakiensis sp. nov., Raphidrilus okinawaensis sp. nov., and Raricirrus anubis sp. nov., are described based on specimens collected from Japanese waters. Ctenodrilus japonicus sp. nov. inhabits the interstitial environment and can be distinguished from the other congeners by the following features: (i) total of 16 chaetigers, (ii) chaetigers 1–3 with stout hooks, (iii) minute body (approximately 1 mm in length), (iv) all parapodia with the same number of chaetae (two notochaetae; two neurochaetae), and (v) presence of do

APA, Harvard, Vancouver, ISO, and other styles

35

BLAKE, JAMES A., JUDITH P. GRASSLE, and KEVIN J. ECKELBARGER. "Capitella teleta, a new species designation for the opportunistic and experimental Capitella sp. I, with a review of the literature for confirmed records." Zoosymposia 2, no. 1 (2009): 25–53. http://dx.doi.org/10.11646/zoosymposia.2.1.6.

Full text

Abstract:

This paper provides a morphological description of Capitella teleta sp. nov., an opportunistic capitellid that is also commonly used as an experimental polychaete under the provisional designation Capitella sp. I. The species is widely distributed along the east and west coasts of North America and also reported from Japan and the Mediterranean. The species belongs to a group having distinct sexual dimorphism, yet with hermaphrodites occurring under certain conditions. Morphologically, C. teleta has a long, narrow body, with all thoracic segments similar except for sexual modifications on seti

APA, Harvard, Vancouver, ISO, and other styles

36

Giangrande, Adriana. "Behaviour, irrigation and respiration in Eudistylia vancouveri (Polychaeta: Sabellidae)." Journal of the Marine Biological Association of the United Kingdom 71, no. 1 (1991): 27–35. http://dx.doi.org/10.1017/s002531540003736x.

Full text

Abstract:

To evaluate the relative importance of tentacular crown and body surface in sabellid respiration, experiments were carried out on Eudistylia vancouveri (Kinberg, 1867), a long narrow worm living in a permanent tube in the intertidal zone. This species irrigates its tube by peristaltic waves, as do most species of Sabellinae and this allows water circulation inside the tube for body surface respiration.Measurements of oxygen uptake after amputation of the tentacular crown indicated a reduction of about 80% of the total respiration. This value was higher than that found for other Sabellinae stud

APA, Harvard, Vancouver, ISO, and other styles

37

Zhadan, Anna. "Two new species of Cossura (Cossuridae, Annelida) from the terminal lobes of the Congo River deep-sea fan." Journal of the Marine Biological Association of the United Kingdom 97, no. 5 (2017): 881–88. http://dx.doi.org/10.1017/s0025315417000066.

Full text

Abstract:

Two new species of Cossura Webster & Benedict, 1887 were found in material collected during sampling from the terminal lobes of the Congo deep-sea fan. They were described using light and scanning electron microscopy. Cossura platypus sp. nov. has 15–17 thoracic chaetigers, a prostomium longer than it is wide, with a widely rounded anterior margin, an abruptly expanded posterior prostomial ring the same length as the peristomium, without a mid-ventral notch, a branchial filament attached to the midlength of chaetiger 3, and a pygidium with three anal cirri. Cossura platypus sp. nov. is sim

APA, Harvard, Vancouver, ISO, and other styles

38

DE MATOS NOGUEIRA, JOÃO MIGUEL, PAT A. HUTCHINGS, and MARCELO VERONESI FUKUDA. "Morphology of terebelliform polychaetes (Annelida: Polychaeta: Terebelliformia), with a focus on Terebellidae." Zootaxa 2460, no. 1 (2010): 1. http://dx.doi.org/10.11646/zootaxa.2460.1.1.

Full text

Abstract:

The morphology of terebelliform polychaetes was investigated for a phylogenetic study focused on Terebellidae. For this study, specimens belonging to 147 taxa, preferably type material or specimens from type localities or areas close to them, were examined under stereo, light and scanning electron microscopes. The taxa examined were 1 Pectinariidae, 2 Ampharetidae, 2 Alvinellidae, 8 Trichobranchidae, and 134 Terebellidae, which included 8 Polycirrinae, 15 Thelepodinae, and 111 Terebellinae. A comparison of the morphology, including prostomium, peristomium, anterior segments and lobes, branchia

APA, Harvard, Vancouver, ISO, and other styles

39

Radashevsky, Vasily I., and Alvaro E. Migotto. "Morphology and biology of a new Pseudopolydora (Annelida: Spionidae) species from Brazil." Journal of the Marine Biological Association of the United Kingdom 89, no. 3 (2008): 461–68. http://dx.doi.org/10.1017/s002531540800177x.

Full text

Abstract:

Adults of Pseudopolydora rosebelae sp. nov. inhabit silty tubes on muddy bottoms in shallow water in southern Brazil, states of São Paulo and Rio de Janeiro. They are rare and extremely delicate, attaining 20 mm long for 55 chaetigers. The worms are distinctive by their colourful yellow and black pigmentation on the anterior part of body and palps, prominent transverse hood on the dorsal anterior edge of chaetiger 3, and lack of coloured respiratory pigment in blood. Of 12 examined individuals, all were females. Oogenesis is intraovarian; oocytes develop from chaetigers 14–15 to chaetigers 24–

APA, Harvard, Vancouver, ISO, and other styles

40

TOVAR-HERNÁNDEZ, MARÍA A., and TERESA SOSA-RODRÍGUEZ. "Redescription of Chone infundibuliformis Krøyer, 1856 (Polychaeta: Sabellidae) and histology of the branchial crown appendages, collar and glandular ridge." Zootaxa 1115, no. 1 (2006): 31. http://dx.doi.org/10.11646/zootaxa.1115.1.2.

Full text

Abstract:

Fifty-three species have been formally described in Chone Krøyer, 1856, showing wide variation in the shapes of dorsal lips, peristomium, and posterior abdominal uncini. Previous studies indicate that such variation could result in splitting of the genus; however, the original description of the type species, C. infundibuliformis did not include critical details and illustrations, and for other species, incomplete or misleading information has been provided. In order to redescribe the species C. infundibuliformis and delineate the genus, type and topotype materials were reviewed, and histologi

APA, Harvard, Vancouver, ISO, and other styles

41

Ignatov, M. S., U. N. Spirina, M. A. Kolesnikova, L. F. VOLOSNOVA, S. V. Polevova, and E. A. Ignatova. "Buxbaumia: a moss peristome without a peristomial." Arctoa 27, no. 1 (2018): 172–202. http://dx.doi.org/10.15298/arctoa.27.17.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

BOSHKO, ELENA G., and LYUDMILA A. KONSTANTYNENKO. "A new species of Pachytrocha Kent, 1882 (Ciliophora, Peritrichia: Vaginicolidae)." Zootaxa 2198, no. 1 (2009): 61–66. http://dx.doi.org/10.11646/zootaxa.2198.1.6.

Full text

Abstract:

The peritrich ciliate Pachytrocha zhytomirensis n. sp. is described from the sewage treatment system of Zhytomir (Ukraine). The new species is characterized by an elongate, subgeniculate lorica sheltering a single zooid with an annular ridge and a peristomial lip thickened noticeably near the entrance to the infundibulum. When contracting, the upper part of the cell bends toward the wall of the lorica and the inflated edge of the peristomial lip covers the body. The macronucleus is ribbon-like and oriented parallel to the longitudinal axis of the cell. Cothurnia asymmetrica Sommer, 1951 is rec

APA, Harvard, Vancouver, ISO, and other styles

43

SUN, PING, DAODE JI, and WEIBO SONG. "Notes on a new marine peritrichous ciliate (Ciliophora: Peritrichida), Zoothamnium xuianum n. sp., with redescription of Z. paraentzii Song, 1991 from northern China." Zootaxa 1075, no. 1 (2005): 41. http://dx.doi.org/10.11646/zootaxa.1075.1.2.

Full text

Abstract:

The morphology, infraciliature and silverline system of two marine peritrichous ciliates, Zoothamnium xuianum n. sp. and Z. paraentzii Song, 1991, collected from a shrimp-hatching plant in northern China, were investigated using both in vivo and silver impregnation methods. The new species is recognized by the following characters: colony alternatively branched, zooids in vivo about 45 × 30 μm with single-layered peristomial lip; contractile vacuole apically located; macronucleus band-like and transversely positioned; more than 50 striations from peristomial area to aboral trochal band, about

APA, Harvard, Vancouver, ISO, and other styles

44

Guinea, A., A. Sola, M. C. Rueda, and D. Fernández-Galiano. "Infraciliature, système myonémique, argyrome et bipartition de l'Astylozoon pyriforme (Ciliophora, Peritrichida)." Canadian Journal of Zoology 66, no. 10 (1988): 2104–9. http://dx.doi.org/10.1139/z88-312.

Full text

Abstract:

Astylozoon pyriforme is a stalkless peritrich whose ciliature is restricted to the oral region and reduced to a few aboral bristles at the posterior pole. As in other peritrichs, the infraciliature is located in two zones, oral (peristome and infundibulum) and aboral (trochal band and scopule). We also observed an epistomial membrane located in the region where the peristomial infraciliature begins, to the right of the haplokinety. The myonemic system of this ciliate has three parts: an oral myonemic ring, a peristomial myonemic network, and longitudinal myonemes. The argyrome consists of 35 t

APA, Harvard, Vancouver, ISO, and other styles

45

Wilkie, Iain C., M. Daniela Candia Carnevali, and Francesco Andrietti. "Microarchitecture and mechanics of the sea‐urchin peristomial membrane." Bolletino di zoologia 61, no. 1 (1994): 39–51. http://dx.doi.org/10.1080/11250009409355857.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

PENG, XIAOHUI, XINLU SHI, and ALAN WARREN. "Establishment of a new peritrich ciliate genus, Pseudepistylis n. gen. (Ciliophora: Peritrichia: Epistylididae), with a description of a new freshwater species, Pseudepistylis songi n. sp. from Wenzhou, China." Zootaxa 1524, no. 1 (2007): 35–45. http://dx.doi.org/10.11646/zootaxa.1524.1.3.

Full text

Abstract:

A new colonial sessilid peritrich genus, Pseudepistylis, is established. Pseudepistylis n. gen. belongs to the family Epistylididae, (i.e. colonial with a non-contractile stalk and peristomial disc not borne on a stalk) but has oral ciliature that makes less than two turns on the peristome before entering the infundibulum and a reticulate silverline system. Morphology, infraciliature and silverline system of the type species Pseudepistylis songi n. sp., isolated from a freshwater pond near Wenzhou, China, have been investigated both in vivo and following silver impregnation. The new species is

APA, Harvard, Vancouver, ISO, and other styles

47

R., Jona Methusala* Patan Aslam Khan. "A Review Article on Antihelminthic Activity of Ethanolic Extract of Dragon Fruit Peel Powder." International Journal of Pharmaceutical Sciences 3, no. 5 (2025): 3722–53. https://doi.org/10.5281/zenodo.15487195.

Full text

Abstract:

The study aimed to evaluate the anthelmintic activity of ethanolic extract derived from dragon fruit (Hylocereus undatus) peel powder. The peels were collected, shade-dried, and subjected to Soxhlet extraction using ethanol. Preliminary phytochemical screening revealed the presence of flavonoids, tannins, alkaloids, saponins, and carbohydrates. Pheretima posthuma, a commonly used model organism due to its physiological similarity to human intestinal parasites, was used to assess anthelmintic efficacy. The extract was tested at concentrations of 25 mg/ml and 50 mg/ml, with albendazole serving a

APA, Harvard, Vancouver, ISO, and other styles

48

Ignatov, Michael S., Ulyana N. Spirina, Maria A. Kolesnikova, Darya A. Ashikhmina, Elena A. Ignatova, and Svetlana V. Polevova. "Peristome development pattern in Encalypta poses a problem: what is the primary peristomial layer in mosses?" Arctoa 27, no. 1 (2018): 1–17. https://doi.org/10.15298/arctoa.27.01.

Full text

Abstract:

Ignatov, Michael S., Spirina, Ulyana N., Kolesnikova, Maria A., Ashikhmina, Darya A., Ignatova, Elena A., Polevova, Svetlana V. (2018): Peristome development pattern in Encalypta poses a problem: what is the primary peristomial layer in mosses? Arctoa 27 (1): 1-17, DOI: 10.15298/arctoa.27.01, URL: https://doi.org/10.15298/arctoa.27.01

APA, Harvard, Vancouver, ISO, and other styles

49

Gelder, S. R., and J. P. Rowe. "Light microscopical and cytochemical study on the adhesive and epidermal gland cell secretions of the branchiobdellid Cambarincola fallax (Annelida: Clitellata)." Canadian Journal of Zoology 66, no. 9 (1988): 2057–64. http://dx.doi.org/10.1139/z88-303.

Full text

Abstract:

Eight types of gland cells are present in six different epidermal glands in the branchiobdellid Cambarincola fallax. The anterior and posterior adhesive organs are both composed of viscid and releaser adhesive gland cell types, and their secretions open onto the anterior attachment site on the ventral surface of the ventral peristomial lip and onto the posterior attachment disc, respectively. The secretion granules of the viscid gland cell type are composed of neutral mucosubstances with basic proteins containing arginine and (or) lysine; the releaser gland cell type contains basic proteinaceo

APA, Harvard, Vancouver, ISO, and other styles

50

Wilkie, I. C., M. D. Candia Carnevali, and F. Andrietti. "Mechanical properties of the peristomial membrane of the cidaroid sea-urchinStylocidaris affinis." Journal of Zoology 238, no. 3 (1996): 557–69. http://dx.doi.org/10.1111/j.1469-7998.1996.tb05413.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!