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369 results for “Cranial morphology”
FIG. 3 in Cranial And Postcranial Morphology Of The Insectivoran-Grade Mammals Hsiangolestes And Naranius (Mammalia, Eutheria) With Analyses Of Their Phylogenetic Relationships
FIG. 3. Composite carbon isotope and magnetic stratigraphy of the Hengyang Basin Paleocene/Eocene boundary interval. A. (above) Composite stratigraphic data from local sections 1 (diamonds), 2 (circles) and 3 (squares) projected on the section 1 stratigraphic scale. The positions of Hengyang Basin (HB) faunal horizons are indicated by LC-L: lower Lingcha fauna from Limuping Formation, LC-U: upper Lingcha fauna from Lingcha Formation. Paleomagnetic data, presented as the latitude of the Virtual Geomagnetic Pole (VGP) corresponding to the average site direction for each sampling locality. Solid symbols represent data from alpha sites, and open circles represent beta sites. Magnetochron assignments are made with reference to marine Paleocene/Eocene boundary section (Kennett and Stott, 1991). B. (opposite page) The Paleocene/Eocene boundary is placed at the base of the carbon isotope excursion, and assigned an age of 54.97 Ma after Wing et al. (1999). Modified from Ting et al. (2003).
Data matrix for phylogenetic analysis of fossil insectivorans in: Cranial and postcranial morphology of the insectivoran-grade mammals Hsiangolestes and Naranius (Mammalia, Eutheria) with analyses of their phylogenetic relationships
<p>Early Cenozoic "insectivorans" possess some of the most primitive morphologies among eutherian mammals. Studies of these archaic mammals offer insights into the early diversifications of basal eutherians. Despite such importance, early fossil "insectivorans" from Asia are poorly known due to a scarcity of fossil remains, which often consist only of fragmentary jaws and teeth. Discoveries of remarkably well-preserved fossil "insectivorans", including complete skulls and articulated postcranial skeletons, from the early Eocene Hengyang Basin in south-central Hunan Province, China, offer a rare opportunity to thoroughly study two taxa belonging to different families.</p> <p>Fine-grained red beds from Hengyang Basin preserve extraordinary fossils with morphological structures rarely seen elsewhere. Thin sections of a skull of Hsiangolestes youngi Zheng and Huang, 1984, for example, reveal the extremely delicate nasal and maxillary turbinates, which, as far as we are aware, are the first known from fossils of this age. We thus take this opportunity to document in detail the cranial and dental morphology, as well as postcranial skeletons, of the Hengyang "insectivorans."</p> <p>In this monograph, we describe several complete skulls and serial sections of a skull, as well as many partial skulls, mandibles, and postcranial skeletons of Hsiangolestes youngi, an Asian early Eocene insectivoran-grade mammal. We also report a new species of Naranius Russell and Dashzeveg 1986—N. hengdongensis—an Asian early Eocene cimolestid and describe its well-preserved skulls and mandibles.</p> <p>Hsiangolestes is endemic to Asia. It is currently known only from the earliest Eocene Lingcha Formation, Hengyang Basin, Hunan Province, China. Naranius closely resembles Cimolestes Marsh, 1889, the type genus of the family Cimolestidae. It is mainly distributed in Asia and known from the earliest Eocene deposits in the Bumban Member of the Naran Bulak Formation, Nemegt Basin, of Mongolia, and the Lingcha Formation, Hengyang Basin, Hunan Province, China. The only record of Naranius reported outside of Asia is N. americanus from the early Wasatchian Red Hot Local Fauna, Mississippi, United States.</p> <p>Using PAUP and TNT search algorithms, we place these Hengyang taxa within phylogenetic context of other fossil "insectivorans" from the Mesozoic and early Cenozoic of Asia together with some well-known Holarctic taxa. A phylogenetic analysis of 290 cranial and dental characters from 36 fossil and modern insectivoran-grade taxa is presented, focusing on new materials of Hsiangolestes youngi and Naranius hengdongensis. Based on the results of our phylogenetic analyses, we propose that (1) Hsiangolestes, Prosarcodon, Sarcodon, and Sinosinopa, form a monophyletic group, for which we propose the family name Sarcodontidae; (2) the family Cimolestidae should be restricted to Naranius and Cimolestes, which are sister taxa; (3) the systematic position of Naranius americanus is uncertain; and (4) the family Micropternodontidae should be restricted to Micropternodus and its allies in North America.</p>
Fig. 6 in Cranial morphology of the Plio-Pleistocene giant madtsoiid snake Wonambi naracoortensis
Fig. 6. Left frontal of Wonambi naracoortensis SAM P30178A in dorsal (A), ventral (B), medial (C), anterior (D), posterior (E), and lateral (F) views.
Fig. 4 in Cranial morphology of the Plio-Pleistocene giant madtsoiid snake Wonambi naracoortensis
Fig. 4. Right pterygoid fragments of Wonambi naracoortensis. A. SAM P31801 in ventral (A1), medial (A2), dorsal (A3), lateral (A4), and posterior (A5) views. B. SAM P30178B in ventral (B1), medial (B2), dorsomedial (B3), and dorsal (B4) views.
Fig. 2 in Cranial morphology of the Plio-Pleistocene giant madtsoiid snake Wonambi naracoortensis
Fig. 2. Maxillae of three individuals of Wonambi naracoortensis in medioventral view. A. SAM P30178A, left (A1) and right (A2) sides. B. P30178B. C. P16172.
Fig. 8 in Cranial morphology of the Plio-Pleistocene giant madtsoiid snake Wonambi naracoortensis
Fig. 8. Braincase elements of Wonambi naracoortensis SAM P30178A in dorsal (A), ventral (B), and right lateral (C) views. Sphenoid and basioccipital with (right) part of parietal, left prootic and exoccipital−opisthotic. See also Figs. 9 and 10.
Fig. 1. Wonambi naracoortensis. A in Cranial morphology of the Plio-Pleistocene giant madtsoiid snake Wonambi naracoortensis
Fig. 1. Wonambi naracoortensis. A. Left maxilla of SAM P30178A in dorsal view. B. Right maxilla of SAM P30178B in lateral (B1), ventral (B2), medial (B3), and dorsal (B4) views.
Fig. 7 in Cranial morphology of the Plio-Pleistocene giant madtsoiid snake Wonambi naracoortensis
Fig. 7. Parietal of Wonambi naracoortensis SAM P27777 in dorsal (A), posterior (B), anterior (C), ventral (D), ventrolateral (E), and lateral (F) views.
Fig. 10 in Cranial morphology of the Plio-Pleistocene giant madtsoiid snake Wonambi naracoortensis
Fig. 10. Braincase elements of Wonambi naracoortensis SAM P30178A in left lateral (A), posterior (B), and right dorsolateral (C) views. Sphenoid, basioccipital, left prootic and left exoccipital shown in articulation; in A the right side of the parietal is shown reversed as if articulated with the left side elements. Drawings in A and C published previously in Scanlon and Lee (2000). Scale approximate, varies with perspective.
Data from: Rate of evolutionary change in cranial morphology of the marsupial genus Monodelphis is constrained by the availability of additive genetic variation
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Data matrix for phylogenetic analysis of fossil insectivorans in: Cranial and postcranial morphology of the insectivoran-grade mammals Hsiangolestes and Naranius (Mammalia, Eutheria) with analyses of their phylogenetic relationships
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Data from: A multiple peak adaptive landscape based on feeding strategies and roosting ecology shaped the evolution of cranial covariance structure and morphological differentiation in phyllostomid bats
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Data from: A test for paedomorphism in domestic pig cranial morphology
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Data from: Interrelationships of basal synapsids: cranial and postcranial morphological partitions suggest different topologies
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Data from: Imperfect morphological convergence: variable changes in cranial structures underlie transitions to durophagy in moray eels
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FIG. 45 in Cranial And Postcranial Morphology Of The Insectivoran-Grade Mammals Hsiangolestes And Naranius (Mammalia, Eutheria) With Analyses Of Their Phylogenetic Relationships
FIG. 45. Skull of Naranius hengdongensis, sp. n., IVPP V7439, stereophotograph in ventral view.
FIG. 37. Hsiangolestes youngi, IVPP V7454 in Cranial And Postcranial Morphology Of The Insectivoran-Grade Mammals Hsiangolestes And Naranius (Mammalia, Eutheria) With Analyses Of Their Phylogenetic Relationships
FIG. 37. Hsiangolestes youngi, IVPP V7454, stereophotograph of cervical vertebrae in dorsal view.
FIG. 33. Hsiangolestes youngi, IVPP V5436 in Cranial And Postcranial Morphology Of The Insectivoran-Grade Mammals Hsiangolestes And Naranius (Mammalia, Eutheria) With Analyses Of Their Phylogenetic Relationships
FIG. 33. Hsiangolestes youngi, IVPP V5436, stereophotograph of left ear region in ventral view.
The Morphology and Parameter Estimation of Cranial Ultrasound Spectrum Based on Cerebral Artery
ClinicalTrials.gov study NCT04730713. IPD Sharing: NO. Countries: 1. Publications: 0.
Figure 38 in The Lower Jurassic ornithischian dinosaur Heterodontosaurus tucki Crompton & Charig, 1962: cranial anatomy, functional morphology, taxonomy, and relationships
Figure 38. NHMUK RU A100 (BMNH A100). Unnamed heterodontosaur remains based on a partial skull that was originally referred to the genus Lycorhinus by Thulborn (1970b) – composite image manipulated to create the effect of a partial anterior skull viewed from left side. A, left premaxilla in medial view (reversed). B, left maxilla in lateral view. C, maxillary dentition in medial view (reversed). D, left dentary in medial view (reversed). Illustrations derived from Charig & Crompton (1974: figs 4–7).
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Allen Brain Atlas
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