cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.1165488.v1
title: A new species of the parareptile genus <i>Delorhynchus</i>, based on articulated skeletal remains from Richards Spur, Lower Permian of Oklahoma

description: ABSTRACTDescription of a new species of the parareptile genus <i>Delorhynchus</i> is based on a well-preserved partial subadult skeleton, an isolated adult skull, and disarticulated elements recently collected from the Lower Permian Richards Spur locality of Oklahoma, U.S.A. <i>Delorhynchus cifellii</i>, sp. nov., is distinguished from <i>Delorhynchus priscus</i> by the lack of an accessory articulating anterodorsal flange of the maxilla. The hypodigm of <i>Delorhynchus cifellii</i> reveals that <i>Delorhynchus</i> is distinguished from other parareptiles by cranial dermal sculpture consisting of a system of low, smooth tuberosities and a pattern of diffuse shallow, circular dimples. In a phylogenetic analysis of parareptiles, <i>Delorhynchus cifellii</i> is positioned as the sister species of Lanthanosuchoidea. Recognition of <i>Delorhynchus cifellii</i>, sp. nov., and its phylogenetic position among parareptiles highlights the significance of the Richards Spur locality in our understanding of the early evolutionary history of reptiles.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP
DOI: 10.6084/m9.figshare.1165485
title: Redescription of the Skull of <i>Coloradisaurus brevis</i> (Dinosauria, Sauropodomorpha) from the Late Triassic Los Colorados Formation of the Ischigualasto-Villa Union Basin, northwestern Argentina

description: ABSTRACTThe cranial anatomy of the basal sauropodomorph <i>Coloradisaurus brevis</i> from the upper levels of the Norian Los Colorados Formation is here redescribed and comparisons made based on the holotype skull and mandible. <i>Coloradisaurus brevis</i> is diagnosed by most of the features proposed in the original description and an additional set of autapomorphies, such as presence of circular upper temporal fenestrae, laminae on the ventrolateral margins of a ventral fossa of the basisphenoid and on the ventral region of the parasphenoid, and tab-like medial process at the posteromedial end of the mandible. <i>Coloradisaurus</i> is placed within Massospondylidae, as in recent analyses. This position is supported primarily by postcranial characters, but some cranial features identified in this study provide additional evidence supporting this position (e.g., jugal contribution to the antorbital fenestra, frontal proportionately longer than nasals). However, the cranial anatomy of <i>Coloradisaurus</i> also bears several characters that are shared with plateosaurids (e.g., low mandibular articulation, broad maxillary wall on the anterior margin of antorbital fossa, broad prefrontals, projection of infratemporal fenestra behind the orbit, stepped braincase, robust septum between basipterygoid processes). Thus, <i>Coloradisaurus</i> is interpreted as a massospondylid that has convergently acquired characters that are otherwise only known in plateosaurids, highlighting the conflicting pattern of character distribution among basal sauropodomorphs.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP
DOI: 10.6084/m9.figshare.1165488.v3
title: A new species of the parareptile genus <i>Delorhynchus</i>, based on articulated skeletal remains from Richards Spur, Lower Permian of Oklahoma

description: ABSTRACTDescription of a new species of the parareptile genus <i>Delorhynchus</i> is based on a well-preserved partial subadult skeleton, an isolated adult skull, and disarticulated elements recently collected from the Lower Permian Richards Spur locality of Oklahoma, U.S.A. <i>Delorhynchus cifellii</i>, sp. nov., is distinguished from <i>Delorhynchus priscus</i> by the lack of an accessory articulating anterodorsal flange of the maxilla. The hypodigm of <i>Delorhynchus cifellii</i> reveals that <i>Delorhynchus</i> is distinguished from other parareptiles by cranial dermal sculpture consisting of a system of low, smooth tuberosities and a pattern of diffuse shallow, circular dimples. In a phylogenetic analysis of parareptiles, <i>Delorhynchus cifellii</i> is positioned as the sister species of Lanthanosuchoidea. Recognition of <i>Delorhynchus cifellii</i>, sp. nov., and its phylogenetic position among parareptiles highlights the significance of the Richards Spur locality in our understanding of the early evolutionary history of reptiles.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP
DOI: 10.6084/m9.figshare.1165488.v2
title: A new species of the parareptile genus <i>Delorhynchus</i>, based on articulated skeletal remains from Richards Spur, Lower Permian of Oklahoma

description: ABSTRACTDescription of a new species of the parareptile genus <i>Delorhynchus</i> is based on a well-preserved partial subadult skeleton, an isolated adult skull, and disarticulated elements recently collected from the Lower Permian Richards Spur locality of Oklahoma, U.S.A. <i>Delorhynchus cifellii</i>, sp. nov., is distinguished from <i>Delorhynchus priscus</i> by the lack of an accessory articulating anterodorsal flange of the maxilla. The hypodigm of <i>Delorhynchus cifellii</i> reveals that <i>Delorhynchus</i> is distinguished from other parareptiles by cranial dermal sculpture consisting of a system of low, smooth tuberosities and a pattern of diffuse shallow, circular dimples. In a phylogenetic analysis of parareptiles, <i>Delorhynchus cifellii</i> is positioned as the sister species of Lanthanosuchoidea. Recognition of <i>Delorhynchus cifellii</i>, sp. nov., and its phylogenetic position among parareptiles highlights the significance of the Richards Spur locality in our understanding of the early evolutionary history of reptiles.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP
DOI: 10.6084/m9.figshare.1165484
title: On the skull of <i>Radinskya</i> (Mammalia) and its phylogenetic position

description: ABSTRACT—The skull of the Paleocene mammal <i>Radinskya</i> is redescribed here, based on direct study of the type and only specimen. A number of inaccuracies from previous studies are corrected. <i>Radinskya</i> possesses two potential synapomorphies with perissodactyls, namely, posteriorly broad nasals and a small, laterally facing exposure of the mastoid process of the periotic. The phylogenetic position of <i>Radinskya</i> is examined using matrices from three studies, two that originally included <i>Radinskya</i> and for which the scores for <i>Radinskya</i> are corrected, and another recent study of archaic ungulates that did not originally include <i>Radinskya</i>. In addition, a new analysis is performed combining data from all three previous studies, including modifications based on the present study. Reanalyses of the three previous studies give conflicting results regarding the issue of perissodactyl ancestry, placing <i>Radinskya</i> as sister taxon to perissodactyls, as sister taxon to a perissodactyl-phenacodontid clade, or as part of a polytomy with perissodactyls and paenugulates. The results of the new analysis (1) place perissodactyls closer to <i>Radinskya</i> than to phenacodontids; (2) place Hyracoidea and Proboscidea (i.e., Paenungulata) as sister taxa to Perissodactyla; (3) do not support inclusion of <i>Radinskya</i> in Phenacolophidae; and (4) are equivocal in placing <i>Lophocion</i> as the phenacodontid closest to perissodactyls. These results thus support neither an Asian nor a North American origin for perissodactyls. Future studies should examine the origins of perissodactyls and other ‘ungulates’ in a broader taxonomic context, in order to more directly address discrepancies between results supported by morphological data and those derived from molecular data.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP
DOI: 10.6084/m9.figshare.1165481
title: The basal titanosaurian <i>Rukwatitan bisepultus</i> (Dinosauria, Sauropoda) from the middle Cretaceous Galula Formation, Rukwa Rift Basin, southwestern Tanzania

description: ABSTRACTWhereas titanosaurians represent the most diverse and cosmopolitan clade of Cretaceous sauropod dinosaurs, they remain rare components of Cretaceous African faunas. Currently recognized continental African titanosaurians include <i>Aegyptosaurus baharijensis</i> and <i>Paralititan stromeri</i> from early Upper Cretaceous deposits near Bahariya Oasis, Egypt, and <i>Malawisaurus dixeyi</i> and <i>Karongasaurus gittelmani</i> from the Lower Cretaceous (∼Aptian) Dinosaur Beds of Malawi, in addition to several undesignated and fragmentary forms across the continent. Here, we describe a new titanosaurian taxon, <i>Rukwatitan bisepultus</i>, on the basis of a partial, semiarticulated postcranial skeleton recovered from the middle Cretaceous Galula Formation in southwestern Tanzania. Unique to <i>Rukwatitan</i> are carotid processes on posterior cervical vertebrae, a deep coracobrachialis fossa and subquadrangular cross-section of the humerus, and a slender, curved, teardrop-shaped pubic peduncle on the ilium. Parsimony and Bayesian phylogenetic analyses of 35 sauropod taxa congruently place <i>Rukwatitan</i> as a non-lithostrotian titanosaurian, a relationship supported by cervical vertebrae with undivided pleurocoels and strongly procoelous anterior caudal vertebrae. <i>Rukwatitan</i> differs from the potentially penecontemporaneous and geographically proximate <i>Malawisaurus</i> by exhibiting weakly developed chevron articulations and posteriorly inclined neural spines on the middle caudal vertebrae, a proximally robust and distally unexpanded humerus, and an anteroventrally elongated coracoid. Similar to biogeographic patterns identified in certain crocodyliform clades (e.g., small-bodied notosuchians), titanosaurians on continental Africa appear to exhibit a regional (e.g., southern versus northern Africa), rather than a continental- or supercontinental-level signal.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP
DOI: 10.6084/m9.figshare.1165484.v1
title: On the skull of <i>Radinskya</i> (Mammalia) and its phylogenetic position

description: ABSTRACT—The skull of the Paleocene mammal <i>Radinskya</i> is redescribed here, based on direct study of the type and only specimen. A number of inaccuracies from previous studies are corrected. <i>Radinskya</i> possesses two potential synapomorphies with perissodactyls, namely, posteriorly broad nasals and a small, laterally facing exposure of the mastoid process of the periotic. The phylogenetic position of <i>Radinskya</i> is examined using matrices from three studies, two that originally included <i>Radinskya</i> and for which the scores for <i>Radinskya</i> are corrected, and another recent study of archaic ungulates that did not originally include <i>Radinskya</i>. In addition, a new analysis is performed combining data from all three previous studies, including modifications based on the present study. Reanalyses of the three previous studies give conflicting results regarding the issue of perissodactyl ancestry, placing <i>Radinskya</i> as sister taxon to perissodactyls, as sister taxon to a perissodactyl-phenacodontid clade, or as part of a polytomy with perissodactyls and paenugulates. The results of the new analysis (1) place perissodactyls closer to <i>Radinskya</i> than to phenacodontids; (2) place Hyracoidea and Proboscidea (i.e., Paenungulata) as sister taxa to Perissodactyla; (3) do not support inclusion of <i>Radinskya</i> in Phenacolophidae; and (4) are equivocal in placing <i>Lophocion</i> as the phenacodontid closest to perissodactyls. These results thus support neither an Asian nor a North American origin for perissodactyls. Future studies should examine the origins of perissodactyls and other ‘ungulates’ in a broader taxonomic context, in order to more directly address discrepancies between results supported by morphological data and those derived from molecular data.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP
DOI: 10.6084/m9.figshare.1165485.v1
title: Redescription of the Skull of <i>Coloradisaurus brevis</i> (Dinosauria, Sauropodomorpha) from the Late Triassic Los Colorados Formation of the Ischigualasto-Villa Union Basin, northwestern Argentina

description: ABSTRACTThe cranial anatomy of the basal sauropodomorph <i>Coloradisaurus brevis</i> from the upper levels of the Norian Los Colorados Formation is here redescribed and comparisons made based on the holotype skull and mandible. <i>Coloradisaurus brevis</i> is diagnosed by most of the features proposed in the original description and an additional set of autapomorphies, such as presence of circular upper temporal fenestrae, laminae on the ventrolateral margins of a ventral fossa of the basisphenoid and on the ventral region of the parasphenoid, and tab-like medial process at the posteromedial end of the mandible. <i>Coloradisaurus</i> is placed within Massospondylidae, as in recent analyses. This position is supported primarily by postcranial characters, but some cranial features identified in this study provide additional evidence supporting this position (e.g., jugal contribution to the antorbital fenestra, frontal proportionately longer than nasals). However, the cranial anatomy of <i>Coloradisaurus</i> also bears several characters that are shared with plateosaurids (e.g., low mandibular articulation, broad maxillary wall on the anterior margin of antorbital fossa, broad prefrontals, projection of infratemporal fenestra behind the orbit, stepped braincase, robust septum between basipterygoid processes). Thus, <i>Coloradisaurus</i> is interpreted as a massospondylid that has convergently acquired characters that are otherwise only known in plateosaurids, highlighting the conflicting pattern of character distribution among basal sauropodomorphs.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP
DOI: 10.6084/m9.figshare.1165484.v3
title: On the skull of <i>Radinskya</i> (Mammalia) and its phylogenetic position

description: ABSTRACT—The skull of the Paleocene mammal <i>Radinskya</i> is redescribed here, based on direct study of the type and only specimen. A number of inaccuracies from previous studies are corrected. <i>Radinskya</i> possesses two potential synapomorphies with perissodactyls, namely, posteriorly broad nasals and a small, laterally facing exposure of the mastoid process of the periotic. The phylogenetic position of <i>Radinskya</i> is examined using matrices from three studies, two that originally included <i>Radinskya</i> and for which the scores for <i>Radinskya</i> are corrected, and another recent study of archaic ungulates that did not originally include <i>Radinskya</i>. In addition, a new analysis is performed combining data from all three previous studies, including modifications based on the present study. Reanalyses of the three previous studies give conflicting results regarding the issue of perissodactyl ancestry, placing <i>Radinskya</i> as sister taxon to perissodactyls, as sister taxon to a perissodactyl-phenacodontid clade, or as part of a polytomy with perissodactyls and paenugulates. The results of the new analysis (1) place perissodactyls closer to <i>Radinskya</i> than to phenacodontids; (2) place Hyracoidea and Proboscidea (i.e., Paenungulata) as sister taxa to Perissodactyla; (3) do not support inclusion of <i>Radinskya</i> in Phenacolophidae; and (4) are equivocal in placing <i>Lophocion</i> as the phenacodontid closest to perissodactyls. These results thus support neither an Asian nor a North American origin for perissodactyls. Future studies should examine the origins of perissodactyls and other ‘ungulates’ in a broader taxonomic context, in order to more directly address discrepancies between results supported by morphological data and those derived from molecular data.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP
DOI: 10.6084/m9.figshare.1165485.v3
title: Redescription of the Skull of <i>Coloradisaurus brevis</i> (Dinosauria, Sauropodomorpha) from the Late Triassic Los Colorados Formation of the Ischigualasto-Villa Union Basin, northwestern Argentina

description: ABSTRACTThe cranial anatomy of the basal sauropodomorph <i>Coloradisaurus brevis</i> from the upper levels of the Norian Los Colorados Formation is here redescribed and comparisons made based on the holotype skull and mandible. <i>Coloradisaurus brevis</i> is diagnosed by most of the features proposed in the original description and an additional set of autapomorphies, such as presence of circular upper temporal fenestrae, laminae on the ventrolateral margins of a ventral fossa of the basisphenoid and on the ventral region of the parasphenoid, and tab-like medial process at the posteromedial end of the mandible. <i>Coloradisaurus</i> is placed within Massospondylidae, as in recent analyses. This position is supported primarily by postcranial characters, but some cranial features identified in this study provide additional evidence supporting this position (e.g., jugal contribution to the antorbital fenestra, frontal proportionately longer than nasals). However, the cranial anatomy of <i>Coloradisaurus</i> also bears several characters that are shared with plateosaurids (e.g., low mandibular articulation, broad maxillary wall on the anterior margin of antorbital fossa, broad prefrontals, projection of infratemporal fenestra behind the orbit, stepped braincase, robust septum between basipterygoid processes). Thus, <i>Coloradisaurus</i> is interpreted as a massospondylid that has convergently acquired characters that are otherwise only known in plateosaurids, highlighting the conflicting pattern of character distribution among basal sauropodomorphs.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP
DOI: 10.6084/m9.figshare.1165484.v2
title: On the skull of <i>Radinskya</i> (Mammalia) and its phylogenetic position

description: ABSTRACT—The skull of the Paleocene mammal <i>Radinskya</i> is redescribed here, based on direct study of the type and only specimen. A number of inaccuracies from previous studies are corrected. <i>Radinskya</i> possesses two potential synapomorphies with perissodactyls, namely, posteriorly broad nasals and a small, laterally facing exposure of the mastoid process of the periotic. The phylogenetic position of <i>Radinskya</i> is examined using matrices from three studies, two that originally included <i>Radinskya</i> and for which the scores for <i>Radinskya</i> are corrected, and another recent study of archaic ungulates that did not originally include <i>Radinskya</i>. In addition, a new analysis is performed combining data from all three previous studies, including modifications based on the present study. Reanalyses of the three previous studies give conflicting results regarding the issue of perissodactyl ancestry, placing <i>Radinskya</i> as sister taxon to perissodactyls, as sister taxon to a perissodactyl-phenacodontid clade, or as part of a polytomy with perissodactyls and paenugulates. The results of the new analysis (1) place perissodactyls closer to <i>Radinskya</i> than to phenacodontids; (2) place Hyracoidea and Proboscidea (i.e., Paenungulata) as sister taxa to Perissodactyla; (3) do not support inclusion of <i>Radinskya</i> in Phenacolophidae; and (4) are equivocal in placing <i>Lophocion</i> as the phenacodontid closest to perissodactyls. These results thus support neither an Asian nor a North American origin for perissodactyls. Future studies should examine the origins of perissodactyls and other ‘ungulates’ in a broader taxonomic context, in order to more directly address discrepancies between results supported by morphological data and those derived from molecular data.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP
DOI: 10.6084/m9.figshare.1165485.v2
title: Redescription of the Skull of <i>Coloradisaurus brevis</i> (Dinosauria, Sauropodomorpha) from the Late Triassic Los Colorados Formation of the Ischigualasto-Villa Union Basin, northwestern Argentina

description: ABSTRACTThe cranial anatomy of the basal sauropodomorph <i>Coloradisaurus brevis</i> from the upper levels of the Norian Los Colorados Formation is here redescribed and comparisons made based on the holotype skull and mandible. <i>Coloradisaurus brevis</i> is diagnosed by most of the features proposed in the original description and an additional set of autapomorphies, such as presence of circular upper temporal fenestrae, laminae on the ventrolateral margins of a ventral fossa of the basisphenoid and on the ventral region of the parasphenoid, and tab-like medial process at the posteromedial end of the mandible. <i>Coloradisaurus</i> is placed within Massospondylidae, as in recent analyses. This position is supported primarily by postcranial characters, but some cranial features identified in this study provide additional evidence supporting this position (e.g., jugal contribution to the antorbital fenestra, frontal proportionately longer than nasals). However, the cranial anatomy of <i>Coloradisaurus</i> also bears several characters that are shared with plateosaurids (e.g., low mandibular articulation, broad maxillary wall on the anterior margin of antorbital fossa, broad prefrontals, projection of infratemporal fenestra behind the orbit, stepped braincase, robust septum between basipterygoid processes). Thus, <i>Coloradisaurus</i> is interpreted as a massospondylid that has convergently acquired characters that are otherwise only known in plateosaurids, highlighting the conflicting pattern of character distribution among basal sauropodomorphs.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP
DOI: 10.6084/m9.figshare.1165480
title: A new dryosaurid ornithopod (Dinosauria, Ornithischia) from the Late Jurassic of Portugal

description: ABSTRACTA new dryosaurid ornithopod, <i>Eousdryosaurus nanohallucis</i>, gen. et sp. nov., is described here based on a single specimen from the Late Jurassic Alcobaça Formation of Portugal. <i>Eousdryosaurus nanohallucis</i> is distinguished from all other dryosaurids by eight autapomorphic features and an unique combination of characters, some of which are also shared by other dryosaurids. <i>Eousdryosaurus</i> is linked with Dryosauridae, because the fourth trochanter is proximally placed and widely separated from the scar for the insertion of the M. caudifemoralis longus, which is restricted to the medial surface of the femoral shaft. Phylogenetic analysis nests <i>Eousdryosaurus</i> in an unresolved polytomy at the base of Dryosauridae together with <i>Callovosaurus</i>, <i>Dryosaurus</i>, and <i>Kangnasaurus</i>. The complete pes of <i>Eousdryosaurus</i>, which has a phalangeal formula of 1-3-4-5-0, supports the putative autapomorphic reduction of the dryosaurid pes that also occurs in parallel in more derived ornithopods.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP