Redescription and phylogenetic affinities of the Early Cretaceous enantiornithine Dapingfangornis sentisorhinus
Anat Rec (Hoboken). 2023 Oct 31. doi: 10.1002/ar.25341. Online ahead of print.ABSTRACTDapingfangornis sentisorhinus, a small to medium-sized enantiornithine from the Lower Cretaceous Jiufotang Formation in Western Liaoning, China, stands as one of the earliest known enantiornithines with well-preserved ornamental tail feathers. However, the original holotype description was limited due to damage and matrix interference, which obscured crucial osteological details. Therefore, we provide an updated description of the holotype specimen of D. sentisorhinus with the aid of CT scanning to reveal new and revised osteological info...
Source: Anatomical Record - October 31, 2023 Category: Anatomy Authors: Shiying Wang Li Li Cuilin Zhao Paul Rummy Renfei Wang Dongyu Hu Source Type: research
Zygomatic arch root position in relation to dietary type in haplorhine primates
Anat Rec (Hoboken). 2023 Oct 25. doi: 10.1002/ar.25340. Online ahead of print.ABSTRACTThe zygomatic root, along with other key craniofacial features, is hypothesized to play a crucial role in strengthening the face in response to stresses and strains related to feeding. As such, it has been cited as indicative of dietary specialization among fossil taxa, although it remains unknown how variable zygomatic arch root position is among living primates, and whether its positioning predicts differences in diet. We test whether primates that consume more mechanically challenging foods possess more anteriorly positioned zygomatic ...
Source: Anatomical Record - October 25, 2023 Category: Anatomy Authors: Hallie M Edmonds E Susanne Daly Irene E Smail Source Type: research
Zygomatic arch root position in relation to dietary type in haplorhine primates
Anat Rec (Hoboken). 2023 Oct 25. doi: 10.1002/ar.25340. Online ahead of print.ABSTRACTThe zygomatic root, along with other key craniofacial features, is hypothesized to play a crucial role in strengthening the face in response to stresses and strains related to feeding. As such, it has been cited as indicative of dietary specialization among fossil taxa, although it remains unknown how variable zygomatic arch root position is among living primates, and whether its positioning predicts differences in diet. We test whether primates that consume more mechanically challenging foods possess more anteriorly positioned zygomatic ...
Source: Anatomical Record - October 25, 2023 Category: Anatomy Authors: Hallie M Edmonds E Susanne Daly Irene E Smail Source Type: research
Zygomatic arch root position in relation to dietary type in haplorhine primates
Anat Rec (Hoboken). 2023 Oct 25. doi: 10.1002/ar.25340. Online ahead of print.ABSTRACTThe zygomatic root, along with other key craniofacial features, is hypothesized to play a crucial role in strengthening the face in response to stresses and strains related to feeding. As such, it has been cited as indicative of dietary specialization among fossil taxa, although it remains unknown how variable zygomatic arch root position is among living primates, and whether its positioning predicts differences in diet. We test whether primates that consume more mechanically challenging foods possess more anteriorly positioned zygomatic ...
Source: Anatomical Record - October 25, 2023 Category: Anatomy Authors: Hallie M Edmonds E Susanne Daly Irene E Smail Source Type: research
Zygomatic arch root position in relation to dietary type in haplorhine primates
Anat Rec (Hoboken). 2023 Oct 25. doi: 10.1002/ar.25340. Online ahead of print.ABSTRACTThe zygomatic root, along with other key craniofacial features, is hypothesized to play a crucial role in strengthening the face in response to stresses and strains related to feeding. As such, it has been cited as indicative of dietary specialization among fossil taxa, although it remains unknown how variable zygomatic arch root position is among living primates, and whether its positioning predicts differences in diet. We test whether primates that consume more mechanically challenging foods possess more anteriorly positioned zygomatic ...
Source: Anatomical Record - October 25, 2023 Category: Anatomy Authors: Hallie M Edmonds E Susanne Daly Irene E Smail Source Type: research
Zygomatic arch root position in relation to dietary type in haplorhine primates
Anat Rec (Hoboken). 2023 Oct 25. doi: 10.1002/ar.25340. Online ahead of print.ABSTRACTThe zygomatic root, along with other key craniofacial features, is hypothesized to play a crucial role in strengthening the face in response to stresses and strains related to feeding. As such, it has been cited as indicative of dietary specialization among fossil taxa, although it remains unknown how variable zygomatic arch root position is among living primates, and whether its positioning predicts differences in diet. We test whether primates that consume more mechanically challenging foods possess more anteriorly positioned zygomatic ...
Source: Anatomical Record - October 25, 2023 Category: Anatomy Authors: Hallie M Edmonds E Susanne Daly Irene E Smail Source Type: research
Zygomatic arch root position in relation to dietary type in haplorhine primates
Anat Rec (Hoboken). 2023 Oct 25. doi: 10.1002/ar.25340. Online ahead of print.ABSTRACTThe zygomatic root, along with other key craniofacial features, is hypothesized to play a crucial role in strengthening the face in response to stresses and strains related to feeding. As such, it has been cited as indicative of dietary specialization among fossil taxa, although it remains unknown how variable zygomatic arch root position is among living primates, and whether its positioning predicts differences in diet. We test whether primates that consume more mechanically challenging foods possess more anteriorly positioned zygomatic ...
Source: Anatomical Record - October 25, 2023 Category: Anatomy Authors: Hallie M Edmonds E Susanne Daly Irene E Smail Source Type: research
Cranial anatomy of the "round-headed" Amphisbaenian Zygaspis quadrifrons (Squamata, Amphisbaenia) based on high-resolution x-ray computed tomography
Anat Rec (Hoboken). 2023 Oct 17. doi: 10.1002/ar.25304. Online ahead of print.ABSTRACTAmphisbaenians are a poorly understood clade of fossorial lizards. Because of their derived anatomy and relative scarcity, the systematics of the clade and its placement within squamates has long been controversial. Traditional approaches grouped species into four assemblages according to burrowing behavior and cranial morphology, resulting in the recognition of "shovel-headed," "round-headed," "keel-headed," and "spade-headed" morphotypes. Recent phylogenetic analyses do not support the monophyly of the taxa that share those morphotypes....
Source: Anatomical Record - October 18, 2023 Category: Anatomy Authors: Christopher J Bell Cristhian Cadena Antonio Meza Lauren Rudie Patrick J Lewis Source Type: research
Variation in the cranial osteology of the amphisbaenian genus Zygaspis based on high-resolution x-ray computed tomography
In this study, we used high-resolution x-ray computed tomography to compare the skulls of 15 specimens from seven of the eight species in the amphisbaenian genus Zygaspis (Zygaspis dolichomenta, Zygaspis ferox, Zygaspis quadrifrons, Zygaspis kafuensis, Zygaspis nigra, Zygaspis vandami, and Zygaspis violacea). Both interspecific and intraspecific variation, including asymmetry, is observed among the cranial bones of the specimens. There are unique morphological features on some cranial bones, including the premaxilla and ectopterygoid of Z. quadrifrons, the pterygoid and vomer of Z. kafuensis, and the extracolumella of Z. n...
Source: Anatomical Record - October 18, 2023 Category: Anatomy Authors: Antonio Meza Christopher J Bell Juan D Daza Monte L Thies Patrick J Lewis Source Type: research
Cranial anatomy of the "round-headed" Amphisbaenian Zygaspis quadrifrons (Squamata, Amphisbaenia) based on high-resolution x-ray computed tomography
Anat Rec (Hoboken). 2023 Oct 17. doi: 10.1002/ar.25304. Online ahead of print.ABSTRACTAmphisbaenians are a poorly understood clade of fossorial lizards. Because of their derived anatomy and relative scarcity, the systematics of the clade and its placement within squamates has long been controversial. Traditional approaches grouped species into four assemblages according to burrowing behavior and cranial morphology, resulting in the recognition of "shovel-headed," "round-headed," "keel-headed," and "spade-headed" morphotypes. Recent phylogenetic analyses do not support the monophyly of the taxa that share those morphotypes....
Source: Anatomical Record - October 18, 2023 Category: Anatomy Authors: Christopher J Bell Cristhian Cadena Antonio Meza Lauren Rudie Patrick J Lewis Source Type: research
Variation in the cranial osteology of the amphisbaenian genus Zygaspis based on high-resolution x-ray computed tomography
In this study, we used high-resolution x-ray computed tomography to compare the skulls of 15 specimens from seven of the eight species in the amphisbaenian genus Zygaspis (Zygaspis dolichomenta, Zygaspis ferox, Zygaspis quadrifrons, Zygaspis kafuensis, Zygaspis nigra, Zygaspis vandami, and Zygaspis violacea). Both interspecific and intraspecific variation, including asymmetry, is observed among the cranial bones of the specimens. There are unique morphological features on some cranial bones, including the premaxilla and ectopterygoid of Z. quadrifrons, the pterygoid and vomer of Z. kafuensis, and the extracolumella of Z. n...
Source: Anatomical Record - October 18, 2023 Category: Anatomy Authors: Antonio Meza Christopher J Bell Juan D Daza Monte L Thies Patrick J Lewis Source Type: research
Cranial anatomy of the "round-headed" Amphisbaenian Zygaspis quadrifrons (Squamata, Amphisbaenia) based on high-resolution x-ray computed tomography
Anat Rec (Hoboken). 2023 Oct 17. doi: 10.1002/ar.25304. Online ahead of print.ABSTRACTAmphisbaenians are a poorly understood clade of fossorial lizards. Because of their derived anatomy and relative scarcity, the systematics of the clade and its placement within squamates has long been controversial. Traditional approaches grouped species into four assemblages according to burrowing behavior and cranial morphology, resulting in the recognition of "shovel-headed," "round-headed," "keel-headed," and "spade-headed" morphotypes. Recent phylogenetic analyses do not support the monophyly of the taxa that share those morphotypes....
Source: Anatomical Record - October 18, 2023 Category: Anatomy Authors: Christopher J Bell Cristhian Cadena Antonio Meza Lauren Rudie Patrick J Lewis Source Type: research
Variation in the cranial osteology of the amphisbaenian genus Zygaspis based on high-resolution x-ray computed tomography
In this study, we used high-resolution x-ray computed tomography to compare the skulls of 15 specimens from seven of the eight species in the amphisbaenian genus Zygaspis (Zygaspis dolichomenta, Zygaspis ferox, Zygaspis quadrifrons, Zygaspis kafuensis, Zygaspis nigra, Zygaspis vandami, and Zygaspis violacea). Both interspecific and intraspecific variation, including asymmetry, is observed among the cranial bones of the specimens. There are unique morphological features on some cranial bones, including the premaxilla and ectopterygoid of Z. quadrifrons, the pterygoid and vomer of Z. kafuensis, and the extracolumella of Z. n...
Source: Anatomical Record - October 18, 2023 Category: Anatomy Authors: Antonio Meza Christopher J Bell Juan D Daza Monte L Thies Patrick J Lewis Source Type: research
Cranial anatomy of the "round-headed" Amphisbaenian Zygaspis quadrifrons (Squamata, Amphisbaenia) based on high-resolution x-ray computed tomography
Anat Rec (Hoboken). 2023 Oct 17. doi: 10.1002/ar.25304. Online ahead of print.ABSTRACTAmphisbaenians are a poorly understood clade of fossorial lizards. Because of their derived anatomy and relative scarcity, the systematics of the clade and its placement within squamates has long been controversial. Traditional approaches grouped species into four assemblages according to burrowing behavior and cranial morphology, resulting in the recognition of "shovel-headed," "round-headed," "keel-headed," and "spade-headed" morphotypes. Recent phylogenetic analyses do not support the monophyly of the taxa that share those morphotypes....
Source: Anatomical Record - October 18, 2023 Category: Anatomy Authors: Christopher J Bell Cristhian Cadena Antonio Meza Lauren Rudie Patrick J Lewis Source Type: research
Variation in the cranial osteology of the amphisbaenian genus Zygaspis based on high-resolution x-ray computed tomography
In this study, we used high-resolution x-ray computed tomography to compare the skulls of 15 specimens from seven of the eight species in the amphisbaenian genus Zygaspis (Zygaspis dolichomenta, Zygaspis ferox, Zygaspis quadrifrons, Zygaspis kafuensis, Zygaspis nigra, Zygaspis vandami, and Zygaspis violacea). Both interspecific and intraspecific variation, including asymmetry, is observed among the cranial bones of the specimens. There are unique morphological features on some cranial bones, including the premaxilla and ectopterygoid of Z. quadrifrons, the pterygoid and vomer of Z. kafuensis, and the extracolumella of Z. n...
Source: Anatomical Record - October 18, 2023 Category: Anatomy Authors: Antonio Meza Christopher J Bell Juan D Daza Monte L Thies Patrick J Lewis Source Type: research
