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Journal articles on the topic 'Morphospace analysis'

Author: Grafiati

Published: 2 June 2025

Last updated: 19 July 2025

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1

PAPPAS, JANICE L. "MORE ON THEORETICAL MORPHOSPACE AND ITS RELATION TO FRESHWATER GOMPHONEMOID-CYMBELLOID DIATOM (BACILLARIOPHYTA) LINEAGES." Journal of Biological Systems 16, no. 01 (2008): 119–37. http://dx.doi.org/10.1142/s0218339008002460.

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All forms from hypothesized gomphonemoid-cymbelloid lineages were constructed using three-dimensional (3D) parametric equations with the same boundary intervals for all forms. To construct a theoretical morphospace, the absolute value of the Riemann sum of differences between pairs of forms in terms of surfaces in the x-, y- and z-directions was determined and plotted in 3D space. In general, naviculoid forms occupied the lowest valued morphospace, and cymbelloid and gomphonemoid forms occupied different higher valued morphospaces. In particular, Anomoeoneis, Brebissonia and Placoneis were bas

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2

Kotrc, Benjamin, and Andrew H. Knoll. "A morphospace of planktonic marine diatoms. II. Sampling standardization and spatial disparity partitioning." Paleobiology 41, no. 1 (2015): 68–88. http://dx.doi.org/10.1017/pab.2014.5.

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AbstractMorphospace occupation through time provides a view of diversification distinct from the more familiar taxonomic tabulations. However, this view is subject to the same geological biases long recognized in studies of taxonomic diversification, where techniques for correcting secular bias in sampling have become standard practice. In this study, we apply sampling standardization techniques to a morphospace investigation to test whether observed stratigraphic trends in morphospace occupation are artifacts of trends in sampling. When sampling bias is corrected by randomized subsampling, al

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3

Polly, P. David, and Gary J. Motz. "PATTERNS AND PROCESSES IN MORPHOSPACE: GEOMETRIC MORPHOMETRICS OF THREE-DIMENSIONAL OBJECTS." Paleontological Society Papers 22 (September 2016): 71–99. http://dx.doi.org/10.1017/scs.2017.9.

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AbstractFocusing on geometric morphometrics (GMM), we review methods for acquiring morphometric data from 3-D objects (including fossils), algorithms for producing shape variables and morphospaces, the mathematical properties of shape space, especially how they relate to morphogenetic and evolutionary factors, and issues posed by working with fossil objects. We use the Raupian shell-coiling equations to illustrate the complexity of the relationship between such factors and GMM morphospaces. The complexity of these issues re-emphasize what are arguably the two most important recommendations for

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4

Foote, Mike. "Nearest-Neighbor Analysis of Trilobite Morphospace." Systematic Zoology 39, no. 4 (1990): 371. http://dx.doi.org/10.2307/2992357.

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Monadjem, Ara, Adam Kane, Peter Taylor, Leigh R. Richards, Grant Hall, and Stephan Woodborne. "Morphology and stable isotope analysis demonstrate different structuring of bat communities in rainforest and savannah habitats." Royal Society Open Science 5, no. 12 (2018): 180849. http://dx.doi.org/10.1098/rsos.180849.

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Bats play important ecological roles in tropical systems, yet how these communities are structured is still poorly understood. Our study explores the structure of African bat communities using morphological characters to define the morphospace occupied by these bats and stable isotope analysis to define their dietary niche breadth. We compared two communities, one in rainforest (Liberia) and one in savannah (South Africa), and asked whether the greater richness in the rainforest was due to more species ‘packing’ into the same morphospace and trophic space than bats from the savannah, or some o

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Monadjem, Ara, Adam Kane, Peter Taylor, Leigh R. Richards, Grant Hall, and Stephan Woodborne. "Morphology and stable isotope analysis demonstrate different structuring of bat communities in rainforest and savannah habitats." Royal Society Open Science 5, no. 12 (2018): 180849. https://doi.org/10.5281/zenodo.13439818.

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(Uploaded by Plazi for the Bat Literature Project) Bats play important ecological roles in tropical systems, yet how these communities are structured is still poorly understood. Our study explores the structure of African bat communities using morphological characters to define the morphospace occupied by these bats and stable isotope analysis to define their dietary niche breadth. We compared two communities, one in rainforest (Liberia) and one in savannah (South Africa), and asked whether the greater richness in the rainforest was due to more species 'packing' into the same morphospace and t

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Monadjem, Ara, Adam Kane, Peter Taylor, Leigh R. Richards, Grant Hall, and Stephan Woodborne. "Morphology and stable isotope analysis demonstrate different structuring of bat communities in rainforest and savannah habitats." Royal Society Open Science 5, no. 12 (2018): 180849. https://doi.org/10.5281/zenodo.13439818.

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(Uploaded by Plazi for the Bat Literature Project) Bats play important ecological roles in tropical systems, yet how these communities are structured is still poorly understood. Our study explores the structure of African bat communities using morphological characters to define the morphospace occupied by these bats and stable isotope analysis to define their dietary niche breadth. We compared two communities, one in rainforest (Liberia) and one in savannah (South Africa), and asked whether the greater richness in the rainforest was due to more species 'packing' into the same morphospace and t

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8

Monadjem, Ara, Adam Kane, Peter Taylor, Leigh R. Richards, Grant Hall, and Stephan Woodborne. "Morphology and stable isotope analysis demonstrate different structuring of bat communities in rainforest and savannah habitats." Royal Society Open Science 5, no. 12 (2018): 180849. https://doi.org/10.5281/zenodo.13439818.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) Bats play important ecological roles in tropical systems, yet how these communities are structured is still poorly understood. Our study explores the structure of African bat communities using morphological characters to define the morphospace occupied by these bats and stable isotope analysis to define their dietary niche breadth. We compared two communities, one in rainforest (Liberia) and one in savannah (South Africa), and asked whether the greater richness in the rainforest was due to more species 'packing' into the same morphospace and t

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9

Monadjem, Ara, Adam Kane, Peter Taylor, Leigh R. Richards, Grant Hall, and Stephan Woodborne. "Morphology and stable isotope analysis demonstrate different structuring of bat communities in rainforest and savannah habitats." Royal Society Open Science 5, no. 12 (2018): 180849. https://doi.org/10.5281/zenodo.13439818.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) Bats play important ecological roles in tropical systems, yet how these communities are structured is still poorly understood. Our study explores the structure of African bat communities using morphological characters to define the morphospace occupied by these bats and stable isotope analysis to define their dietary niche breadth. We compared two communities, one in rainforest (Liberia) and one in savannah (South Africa), and asked whether the greater richness in the rainforest was due to more species 'packing' into the same morphospace and t

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10

Monadjem, Ara, Adam Kane, Peter Taylor, Leigh R. Richards, Grant Hall, and Stephan Woodborne. "Morphology and stable isotope analysis demonstrate different structuring of bat communities in rainforest and savannah habitats." Royal Society Open Science 5, no. 12 (2018): 180849. https://doi.org/10.5281/zenodo.13439818.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) Bats play important ecological roles in tropical systems, yet how these communities are structured is still poorly understood. Our study explores the structure of African bat communities using morphological characters to define the morphospace occupied by these bats and stable isotope analysis to define their dietary niche breadth. We compared two communities, one in rainforest (Liberia) and one in savannah (South Africa), and asked whether the greater richness in the rainforest was due to more species 'packing' into the same morphospace and t

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11

McGhee, George R., and Frank K. McKinney. "A theoretical morphologic analysis of convergently evolved erect helical colony form in the Bryozoa." Paleobiology 26, no. 4 (2000): 556–77. http://dx.doi.org/10.1666/0094-8373(2000)026<0556:atmaoc>2.0.co;2.

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Exploration of the theoretical morphospace of erect helical colony form in Bryozoa, created by McKinney and Raup (1982), reveals that only a small volume of the three-dimensional space of hypothetical form is occupied by actual colonies of the Paleozoic fenestrates (Class Stenolaemata) Archimedes and Helicopora, helical species of the cheilostome (Class Gymnolaemata) Bugula, and the cyclostome (Class Stenolaemata) Crisidmonea archimediformis. Actual helical-colony bryozoans are not found in regions of the morphospace characterized by colony geometries that possess the largest surface areas of

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Starcher, Robert W., and George R. McGhee. "Fenestrate theoretical morphology: geometric constraints on lophophore shape and arrangement in extinct Bryozoa." Paleobiology 26, no. 1 (2000): 116–36. http://dx.doi.org/10.1666/0094-8373(2000)026<0116:ftmgco>2.0.co;2.

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A geometric analysis of fenestrate bryozoan lophophore shape and arrangement is conducted by creating a theoretical morphospace of apertural positioning within the colonial meshwork. Working from the assumption that fenestrate bryozoans needed to form a continuous filtering surface with contact between adjacent lophophores, we show that within the morphospace three regions exist for optimum close-packing of lophophores with circular projections; all other close-packing configurations in the morphospace require the existence of noncircular lophophores.Examination of the actual distribution of 2

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Schönenberger, J., M. Chartier, and Y. Staedler. "Modern theoretical and technical approaches in plant morphology." Modern Phytomorphology 9 (Supplement) (April 1, 2016): 79. https://doi.org/10.5281/zenodo.159706.

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Morphology is deeply rooted in organismal biology, which in recent years has gone through a steady decline in interest both at research institutions and funding agencies. In parallel with this development, morphology as a discipline has been marginalized and nowadays many think of it as just a classical and largely obsolete field of research. However, this is far from the truth. Thanks to modern theoretical concepts and novel technical applications, plant morphology has much to contribute to modern botanical and evolutionary research. In our presentation, we will first outline the application

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14

Ciampaglio, Charles N., Matthieu Kemp, and Daniel W. McShea. "Detecting changes in morphospace occupation patterns in the fossil record: characterization and analysis of measures of disparity." Paleobiology 27, no. 4 (2001): 695–715. http://dx.doi.org/10.1666/0094-8373(2001)027<0695:dcimop>2.0.co;2.

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Recently, there has been much interest in detecting and measuring patterns of change in disparity. Although most studies have used one or two measures of disparity to quantify and characterize the occupation of morphospace, multiple measures may be necessary to fully detect changes in patterns of morphospace occupation. Also, the ability to detect morphological trends and occupation patterns within morphospace depends on using the appropriate measure(s) of disparity. In this study, seven measures were used to determine and characterize sensitivity to sample size of the data, number of morpholo

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Bennett, C. Verity, and Anjali Goswami. "Morphometric Analysis of Cranial Shape in Fossil and Recent Euprimates." Anatomy Research International 2012 (May 7, 2012): 1–7. http://dx.doi.org/10.1155/2012/478903.

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Quantitative analysis of morphology allows for identification of subtle evolutionary patterns or convergences in anatomy that can aid ecological reconstructions of extinct taxa. This study explores diversity and convergence in cranial morphology across living and fossil primates using geometric morphometrics. 33 3D landmarks were gathered from 34 genera of euprimates (382 specimens), including the Eocene adapiforms Adapis and Leptadapis and Quaternary lemurs Archaeolemur, Palaeopropithecus, and Megaladapis. Landmark data was treated with Procrustes superimposition to remove all nonshape differ

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16

Lutz, Timothy M., and George E. Boyajian. "Fractal geometry of ammonoid sutures." Paleobiology 21, no. 3 (1995): 329–42. http://dx.doi.org/10.1017/s0094837300013336.

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Interior chamber walls of ammonites range from smoothly undulating surfaces in some taxa to complex surfaces, corrugated on many scales, in others. The ammonite suture, which is the expression of the intersection of these walls on the exterior of the shell, has been used to assess anatomical complexity. We used the fractal dimension to measure sutural complexity and to investigate complexity over evolutionary time and showed that the range of variation in sutural complexity increased through time. In this paper we extend our analyses and consider two new parameters that measure the range of sc

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17

Navarro, Nicolas. "MDA: a MATLAB-based program for morphospace-disparity analysis." Computers & Geosciences 29, no. 5 (2003): 655–64. http://dx.doi.org/10.1016/s0098-3004(03)00043-8.

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18

Foote, Mike. "Rarefaction analysis of morphological and taxonomic diversity." Paleobiology 18, no. 1 (1992): 1–16. http://dx.doi.org/10.1017/s0094837300012185.

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Our assessment of morphological diversity is influenced by morphological extremes and therefore depends on sample size (taxonomic richness). Rarefaction predicts the morphological diversity that would probably be observed in a sample of reduced size, thereby allowing both compensation for differences in sample size that may be strictly preservational, and analysis of diversity structure, that is, the relationship between morphological and taxonomic diversity. Middle and Late Cambrian trilobites exhibit a diversity structure characterized by many variations on a few morphological themes. In con

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19

Dommergues, Jean-Louis, Bernard Laurin, and Christian Meister. "Evolution of ammonoid morphospace during the Early Jurassic radiation." Paleobiology 22, no. 2 (1996): 219–40. http://dx.doi.org/10.1017/s0094837300016183.

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The morphologic radiation of Early Jurassic ammonites following the near extinction at the end of the Triassic is analyzed from 436 species of 156 genera that form a representative sample of morphs occurring worldwide in the first three stages of the Jurassic (Hettangian, Sinemurian, Pliensbachian: 36 subzones, 24 m.y.). Morphologic diversity is analyzed independently of taxonomy by processing 18 shape parameters using multivariate analysis and clustering techniques. The morphospace thus defined indicates that morphs fall readily into two groups made up of four and five adjacent morpho-subsets

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20

Romano, Marco, Robert Sansom, and Emma Randle. "Morphospace saturation in the stem-gnathostomes pteraspidiformes heterostracans: an early radiation of a ‘bottom’ heavy clade." PeerJ 6 (July 20, 2018): e5249. http://dx.doi.org/10.7717/peerj.5249.

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Ostracoderms (fossil armoured jawless fishes) shed light on early vertebrate evolution by revealing the step-wise acquisition of jawed vertebrate characters, and were important constituents of Middle Palaeozoic vertebrate faunas. A wide variety of head shield shapes are observed within and between the ostracoderm groups, but the timing of these diversifications and the consistency between different measures of their morphospace are unclear. Here, we present the first disparity (explored morphospace) versus diversity (number of taxa) analysis of Pteraspidiformes heterostracans using continuous

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21

Navarro, Charlie A., Elizabeth Martin-Silverstone, and Thomas L. Stubbs. "Morphometric assessment of pterosaur jaw disparity." Royal Society Open Science 5, no. 4 (2018): 172130. http://dx.doi.org/10.1098/rsos.172130.

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Pterosaurs were a successful group of Mesozoic flying reptiles. They were the first vertebrate group to achieve powered flight and varied enormously in morphology and ecology, occupying a variety of niches and developing specialized feeding strategies. Ecomorphological principles suggest this variation should be reflected by great morphological diversity in the lower jaw, given that the mandible served as the primary apparatus for prey acquisition. Here we present the first study of mandibular shape disparity in pterosaurs and aim to characterize major aspects of variation. We use a combinatio

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22

Brougham, Tom, and Nicolás E. Campione. "Body size correlates with discrete-character morphological proxies." Paleobiology 46, no. 3 (2020): 304–19. http://dx.doi.org/10.1017/pab.2020.23.

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AbstractPrincipal coordinates analysis (PCoA) is a statistical ordination technique commonly applied to morphology-based cladistic matrices to study macroevolutionary patterns, morphospace occupation, and disparity. However, PCoA-based morphospaces are dissociated from the original data; therefore, whether such morphospaces accurately reflect body-plan disparity or extrinsic factors, such as body size, remains uncertain. We collated nine character–taxon matrices of dinosaurs together with body-mass estimates for all taxa and tested for relationships between body size and both the principal axi

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23

Pachut, Joseph F., Robert L. Anstey, and Alan S. Horowitz. "The H. A. Nicholson Collection of Paleozoic stenolaemate bryozoans: comparison of cladistic and phenetic classifications." Journal of Paleontology 68, no. 5 (1994): 978–94. http://dx.doi.org/10.1017/s0022336000026597.

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Until the late 1960's, most of Nicholson's types of Paleozoic bryozoans were not available for study. We present a set of coded characters of many of Nicholson's types, which should assist in bringing his species into conformity with current taxonomic standards so that his species can be consistently recognized and used in biostratigraphic, paleobiogeographic, and evolutionary studies.Cladistic and phenetic analyses of these species permit comparisons between inferred phylogenies of Nicholson specimens, adaptive morphospace, and treatise-based systematic relationships. Specimen-based cladistic

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Fontanarrosa, Gabriela, Virginia Abdala, and Daniel A. Dos Santos. "Morphospace analysis leads to an evo‐devo model of digit patterning." Journal of Experimental Zoology Part B: Molecular and Developmental Evolution 336, no. 4 (2021): 341–51. http://dx.doi.org/10.1002/jez.b.23026.

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Sibert, Elizabeth, Matt Friedman, Pincelli Hull, Gene Hunt, and Richard Norris. "Two pulses of morphological diversification in Pacific pelagic fishes following the Cretaceous–Palaeogene mass extinction." Proceedings of the Royal Society B: Biological Sciences 285, no. 1888 (2018): 20181194. http://dx.doi.org/10.1098/rspb.2018.1194.

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Molecular phylogenies suggest some major radiations of open-ocean fish clades occurred roughly coincident with the Cretaceous–Palaeogene (K/Pg) boundary, however the timing and nature of this diversification is poorly constrained. Here, we investigate evolutionary patterns in ray-finned fishes across the K/Pg mass extinction 66 million years ago (Ma), using microfossils (isolated teeth) preserved in a South Pacific sediment core spanning 72–43 Ma. Our record does not show significant turnover of fish tooth morphotypes at the K/Pg boundary: only two of 48 Cretaceous tooth morphotypes disappear

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Pacheco, Thaynara L., Marcela L. Monné, and Dirk Ahrens. "Comparative analysis of morphospace of Neotropical Sericini (Coleoptera: Scarabaeidae): disparity in the light of species diversity and activity patterns." Organisms Diversity & Evolution 22, no. 1 (2021): 177–88. https://doi.org/10.1007/s13127-021-00530-y.

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Pacheco, Thaynara L., Monné, Marcela L., Ahrens, Dirk (2022): Comparative analysis of morphospace of Neotropical Sericini (Coleoptera: Scarabaeidae): disparity in the light of species diversity and activity patterns. Organisms Diversity & Evolution (New York, N.Y.) 22 (1): 177-188, DOI: 10.1007/s13127-021-00530-y, URL: http://dx.doi.org/10.1007/s13127-021-00530-y

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O'Keefe, F. Robin. "The evolution of plesiosaur and pliosaur morphotypes in the Plesiosauria (Reptilia: Sauropterygia)." Paleobiology 28, no. 1 (2002): 101–12. http://dx.doi.org/10.1666/0094-8373(2002)028<0101:teopap>2.0.co;2.

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The dichotomy between short-necked, large-headed “pliosaurs” and long-necked, small-headed “plesiosaurs” has formed the basis of plesiosaur taxonomy for over one hundred years. Recent work has cast doubt on the taxonomic validity of this dichotomy, suggesting that the pliosaur morphotype may have evolved independently in more than one clade. This paper quantifies the variation in body proportion in the clade Plesiosauria using principal component analysis and demonstrates that the traditional plesiosaur/pliosaur dichotomy is an oversimplified view of the range of morphologies present in the gr

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Angielczyk, Kenneth D., and Marcello Ruta. "The Roots of Amphibian Morphospace: A Geometric Morphometric Analysis of Paleozoic Temnospondyls." Fieldiana Life and Earth Sciences 5 (October 18, 2012): 40–58. http://dx.doi.org/10.3158/2158-5520-5.1.40.

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Grant, Robyn A., Vincent Bonhomme, and Tom Allen. "Generating novel tennis racket shape concepts using a theoretical morphospace." PLOS ONE 19, no. 9 (2024): e0310155. http://dx.doi.org/10.1371/journal.pone.0310155.

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Statistical shape analysis, or morphometrics, is a technique commonly used in evolutionary biology to summarise a population of samples. Theoretical morphometrics extends the current population of samples into a theoretical space. Using the lawn tennis racket as an example, this paper showcases the potential of morphometrics as a tool for inspiring design concepts for novel sporting goods. It showcases how morphometrics can be applied to summarise the shape of a sample of rackets and applies theoretical morphometrics to systematically present new candidate designs that fall outside of the inpu

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McGhee, George R. "Theoretical Morphology: The Concept and its Applications." Short Courses in Paleontology 4 (1991): 87–102. http://dx.doi.org/10.1017/s2475263000002130.

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Two quite different conceptual areas are understood today under the umbrella term of theoretical morphology: (1) the mathematical simulation of form, and (2) the analysis of the possible spectra of form via hypothetical morphospace construction. The second concept follows from the first, but has quite different goals.

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Deline, Bradley, Jennifer M. Greenwood, James W. Clark, Mark N. Puttick, Kevin J. Peterson, and Philip C. J. Donoghue. "Evolution of metazoan morphological disparity." Proceedings of the National Academy of Sciences 115, no. 38 (2018): E8909—E8918. http://dx.doi.org/10.1073/pnas.1810575115.

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The animal kingdom exhibits a great diversity of organismal form (i.e., disparity). Whether the extremes of disparity were achieved early in animal evolutionary history or clades continually explore the limits of possible morphospace is subject to continuing debate. Here we show, through analysis of the disparity of the animal kingdom, that, even though many clades exhibit maximal initial disparity, arthropods, chordates, annelids, echinoderms, and mollusks have continued to explore and expand the limits of morphospace throughout the Phanerozoic, expanding dramatically the envelope of disparit

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Muñoz, Nahuel A., Guillermo H. Cassini, Adriana M. Candela, and Sergio F. Vizcaíno. "Ulnar articular surface 3-D landmarks and ecomorphology of small mammals: a case study of two early Miocene typotheres (Notoungulata) from Patagonia." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 106, no. 4 (2015): 315–23. http://dx.doi.org/10.1017/s1755691016000141.

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ABSTRACTArticular surfaces reflect the relative movements between adjacent bones, and the ones involved in the elbow joint provide information about forelimb movements and may be useful for making inferences about the substrate use. The proximal articular surface of the ulna was examined through 3-D geometric morphometrics, in order to assess its usefulness as a proxy for paleoecological interpretations; particularly for two small mammals from the early Miocene of Patagonia. The sample was composed of 22 extant small mammals (rodents, carnivorans and primates) and two extinct typotheres: Heget

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Wilson, Jonathan P., and Andrew H. Knoll. "A physiologically explicit morphospace for tracheid-based water transport in modern and extinct seed plants." Paleobiology 36, no. 2 (2010): 335–55. http://dx.doi.org/10.1666/08071.1.

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We present a morphometric analysis of water transport cells within a physiologically explicit three-dimensional space. Previous work has shown that cell length, diameter, and pit resistance govern the hydraulic resistance of individual conducting cells; thus, we use these three parameters as axes for our morphospace. We compare living and extinct plants within this space to investigate how patterns of plant conductivity have changed over evolutionary time. Extinct coniferophytes fall within the range of living conifers, despite differences in tracheid-level anatomy. Living cycads, Ginkgo bilob

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Sclafani, Judith A., Curtis R. Congreve, Andrew Z. Krug, and Mark E. Patzkowsky. "Effects of mass extinction and recovery dynamics on long-term evolutionary trends: a morphological study of Strophomenida (Brachiopoda) across the Late Ordovician mass extinction." Paleobiology 44, no. 4 (2018): 603–19. http://dx.doi.org/10.1017/pab.2018.24.

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AbstractMass extinctions affect the history of life by decimating existing diversity and ecological structure and creating new evolutionary and ecological pathways. Both the loss of diversity during these events and the rebound in diversity following extinction had a profound effect on Phanerozoic evolutionary trends. Phylogenetic trees can be used to robustly assess the evolutionary implications of extinction and origination.We examine both extinction and origination during the Late Ordovician mass extinction. This mass extinction was the second largest in terms of taxonomic loss but did not

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Ubukata, Takao. "Stacking Increments: A New Model and Morphospace for the Analysis of Bivalve Shell Growth." Historical Biology 15, no. 4 (2001): 303–21. http://dx.doi.org/10.1080/0891296021000024475.

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Kapitány, Rohan, Christopher Kavanagh, and Harvey Whitehouse. "Ritual morphospace revisited: the form, function and factor structure of ritual practice." Philosophical Transactions of the Royal Society B: Biological Sciences 375, no. 1805 (2020): 20190436. http://dx.doi.org/10.1098/rstb.2019.0436.

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Human rituals exhibit bewildering diversity, from the Mauritian Kavadi to Catholic communion. Is this diversity infinitely plastic or are there some general dimensions along which ritual features vary? We analyse two cross-cultural datasets: one drawn from the anthropological record and another novel contemporary dataset, to examine whether a consistent underlying set of latent dimensions in ritual structure and experiences can be detected. First, we conduct a factor analysis on 651 rituals from 74 cultural groups, in which 102 binary variables are coded. We find a reliable set of dimensions e

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Giménez, Analía Laura, and Norberto Pedro Giannini. "Ecomorphological Diversity in the Patagonian Assemblage of Bats from Argentina." Acta Chiropterologica 19, no. 2 (2017): 287–303. https://doi.org/10.5281/zenodo.13458210.

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(Uploaded by Plazi for the Bat Literature Project) Patagonian bats are represented by only insectivorous species, five vespertilionids and one molossid species. They constitute an interesting assemblage of temperate species that remains poorly studied. Here we uncover ecomorphological patterns of Patagonian bats using craniodental morphology, aerodynamic measurements, and external bodily characters. Multivariate analysis was applied to characterize morphometric variation of each dataset separately and in combination. We explored the segregation of species in morphospace, and the importance of

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Giménez, Analía Laura, and Norberto Pedro Giannini. "Ecomorphological Diversity in the Patagonian Assemblage of Bats from Argentina." Acta Chiropterologica 19, no. 2 (2017): 287–303. https://doi.org/10.5281/zenodo.13458210.

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(Uploaded by Plazi for the Bat Literature Project) Patagonian bats are represented by only insectivorous species, five vespertilionids and one molossid species. They constitute an interesting assemblage of temperate species that remains poorly studied. Here we uncover ecomorphological patterns of Patagonian bats using craniodental morphology, aerodynamic measurements, and external bodily characters. Multivariate analysis was applied to characterize morphometric variation of each dataset separately and in combination. We explored the segregation of species in morphospace, and the importance of

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39

Giménez, Analía Laura, and Norberto Pedro Giannini. "Ecomorphological Diversity in the Patagonian Assemblage of Bats from Argentina." Acta Chiropterologica 19, no. 2 (2017): 287–303. https://doi.org/10.5281/zenodo.13458210.

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(Uploaded by Plazi for the Bat Literature Project) Patagonian bats are represented by only insectivorous species, five vespertilionids and one molossid species. They constitute an interesting assemblage of temperate species that remains poorly studied. Here we uncover ecomorphological patterns of Patagonian bats using craniodental morphology, aerodynamic measurements, and external bodily characters. Multivariate analysis was applied to characterize morphometric variation of each dataset separately and in combination. We explored the segregation of species in morphospace, and the importance of

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Giménez, Analía Laura, and Norberto Pedro Giannini. "Ecomorphological Diversity in the Patagonian Assemblage of Bats from Argentina." Acta Chiropterologica 19, no. 2 (2017): 287–303. https://doi.org/10.5281/zenodo.13458210.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) Patagonian bats are represented by only insectivorous species, five vespertilionids and one molossid species. They constitute an interesting assemblage of temperate species that remains poorly studied. Here we uncover ecomorphological patterns of Patagonian bats using craniodental morphology, aerodynamic measurements, and external bodily characters. Multivariate analysis was applied to characterize morphometric variation of each dataset separately and in combination. We explored the segregation of species in morphospace, and the importance of

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Giménez, Analía Laura, and Norberto Pedro Giannini. "Ecomorphological Diversity in the Patagonian Assemblage of Bats from Argentina." Acta Chiropterologica 19, no. 2 (2017): 287–303. https://doi.org/10.5281/zenodo.13458210.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) Patagonian bats are represented by only insectivorous species, five vespertilionids and one molossid species. They constitute an interesting assemblage of temperate species that remains poorly studied. Here we uncover ecomorphological patterns of Patagonian bats using craniodental morphology, aerodynamic measurements, and external bodily characters. Multivariate analysis was applied to characterize morphometric variation of each dataset separately and in combination. We explored the segregation of species in morphospace, and the importance of

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Neige, Pascal, Serge Elmi, and Louis Rulleau. "Existe-t-il une crise au passage Lias-Dogger chez les ammonites? Approche morphometrique par quantification de la disparite morphologique." Bulletin de la Société Géologique de France 172, no. 2 (2001): 257–64. http://dx.doi.org/10.2113/172.2.257.

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Abstract Morphological changes observed in ammonites at the Lias-Dogger (Toarcian-Aalenian) boundary are analyzed here. The study covers all known ammonites worldwide over some 2 m.y. (the last two biozones of the Toarcian: Pseudoradiosa and Aalensis and the first biozone of the Aalenian: Opalinum). Ammonite taxonomy at this boundary is still open to question, the main disagreements being over groupings at family or super-family level. The evolutionary schema developed by Tintant and Mouterde [1981] shows two main sets of Ammonitina for the time: (1) the dominant Hammatocerataceae (Graphocerat

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Wills, Matthew A. "Cambrian and Recent disparity: the picture from priapulids." Paleobiology 24, no. 2 (1998): 177–99. http://dx.doi.org/10.1666/0094-8373(1998)024[0177:cardtp]2.3.co;2.

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Abstract An understanding of several macroevolutionary trends has been greatly advanced in recent years by a focus on disparity (morphological variety) rather than taxic diversity. A seminal issue has been the nature of the Cambrian Radiation, and the question of whether problematical Cambrian fossils embody a range of anatomical design far exceeding that observed thereafter. Arthropods have hitherto furnished the only case study, revealing comparable levels of Cambrian and Recent disparity. The generality of this observation needs to be tested in other groups, and the priapulid worms provide

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Marshall, Stephen. "An area structure approach to morphological representation and analysis." Urban Morphology 19, no. 2 (2014): 117–34. http://dx.doi.org/10.51347/jum.v19i2.4026.

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A system for representing and analysing town plans as ‘area structures’ is presented. This starts from the observation that a town plan is a geometric object featuring areas whose relations can be articulated using diagrams and symbols. Devices such as the ‘containment graph’ and ‘area-stratum diagram’ are introduced, and a set of conventions for symbolic notation is demonstrated. These are used to represent morphological relations and operations. The paper suggests interpreting urban land, plots and building footprints as three ‘media’ (A, B, C) and uses symbolic notation to articulate typica

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Saunders, W. B., Emily Greenfest-Allen, David M. Work, and S. V. Nikolaeva. "Morphologic and taxonomic history of Paleozoic ammonoids in time and morphospace." Paleobiology 34, no. 1 (2008): 128–54. http://dx.doi.org/10.1666/07053.1.

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Principal components analysis (PCA) of 21 shell parameters (geometry, sculpture, aperture shape, and suture complexity) in 597 L. Devonian to L. Triassic ammonoid genera (spanning ~166 Myr) shows that eight basic morphotypes appeared within ~20 Myr of the first appearance of ammonoids. With one exception, these morphotypes persisted throughout the Paleozoic, occurring in ~75% of the ~5-Myr time bins used in this study. Morphotypes were not exclusive to particular lineages. Their persistence was not just a product of phylogenetic constraints or longevity, and multiple iterations of the same mor

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PAPPAS, JANICE L. "GRAPH MATCHING A SKELETONIZED THEORETICAL MORPHOSPACE WITH A CLADOGRAM FOR GOMPHONEMOID-CYMBELLOID DIATOMS (BACILLARIOPHYTA)." Journal of Biological Systems 19, no. 01 (2011): 47–70. http://dx.doi.org/10.1142/s0218339011003816.

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A three-dimensional (3D) theoretical morphospace of gomphonemoid and cymbelloid diatoms was skeletonized using concepts from extended Reeb graph analysis and Morse theory. The resultant skeleton tree was matched to a cladogram of the same group of related taxa using adjacency matrices of the trees and ordinated with multidimensional scaling (MDS) of leaf nodes. From this, an unweighted path matrix based on the number of branches between leaf nodes was ordinated to determine degree of matched tree structures. A constrained MDS of the path matrix, weighted by ranked MDS leaf node groups as facet

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De Lisle, Stephen P., and Locke Rowe. "Independent evolution of the sexes promotes amphibian diversification." Proceedings of the Royal Society B: Biological Sciences 282, no. 1803 (2015): 20142213. http://dx.doi.org/10.1098/rspb.2014.2213.

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Classic ecological theory predicts that the evolution of sexual dimorphism constrains diversification by limiting morphospace available for speciation. Alternatively, sexual selection may lead to the evolution of reproductive isolation and increased diversification. We test contrasting predictions of these hypotheses by examining the relationship between sexual dimorphism and diversification in amphibians. Our analysis shows that the evolution of sexual size dimorphism (SSD) is associated with increased diversification and speciation, contrary to the ecological theory. Further, this result is

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Cyriac, Vivek, Muhamed Palot, Kaushik Deuti, and P. Umesh. "A preliminary 16S rRNA phylogeny of the Indian Cnemaspis Strauch, 1887 (Squamata: Gekkonidae) with the description of two new cryptic species from the C. wynadensis clade." Vertebrate Zoology 70 (May 8, 2020): 171–93. https://doi.org/10.26049/VZ70-2-2020-06.

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Two new species of geckos of the genus <i>Cnemaspis</i> Strauch, 1887 are described from the Western Ghats of Kerala using an integrated taxonomic approach employing phylogenetic and multivariate morphometric methods. We provide a preliminary 16S rRNA tree of the Indian <i>Cnemaspis</i> and ascertain the phylogenetic placement of the two new species within the <i>wynadensis</i> clade. Our morphometric analysis indicates that, although there was overlap in the morphospace across species, the morphospace occupied by the two new species were considerably different from most other species within t

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Voyta, L. L., V. E. Omelko, E. P. Izvarin, et al. "Late Quaternary communities of shrews, Soricidae, from Ural and Far East Regions of Russia: A protocol for the multifactorial morphospace building." Proceedings of the Zoological Institute RAS 327, no. 3 (2023): 555–90. http://dx.doi.org/10.31610/trudyzin/2023.327.3.555.

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The present paper is a preliminary attempt to develop a protocol for analyzing Late Pleistocene and Holocene paleocommunities of soricids using modern approaches for the morphological data analysis. First, we assessed the abilities of fossil soricid collections from Ural and Far East localities to provide a complex interregional analysis of the phenotype variation. Accordingly, for the first time in the general context, the study provides a species list and chronological position of Ural and Far East shrew fossil samples in terms of inter- and intraregional comparisons to reveal general and sp

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RUTA, Marcello, Jonathan KRIEGER, Kenneth D. ANGIELCZYK, and Matthew A. WILLS. "The evolution of the tetrapod humerus: morphometrics, disparity, and evolutionary rates." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 109, no. 1-2 (2018): 351–69. http://dx.doi.org/10.1017/s1755691018000749.

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ABSTRACTThe present study explores the macroevolutionary dynamics of shape changes in the humeri of all major grades and clades of early tetrapods and their fish-like forerunners. Coordinate point eigenshape analysis applied to humeral outlines in extensor view reveals that fish humeri are more disparate than those of most early tetrapod groups and significantly separate from the latter. Our findings indicate sustained changes in humeral shape in the deepest portions of the tetrapod stem group and certain portions of the crown. In the first half of sampled tetrapod history, subclades show larg

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