cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.1017002.v3
title: A new crocodyliform from the middle Cretaceous Galula Formation, southwestern Tanzania

description: ABSTRACTA new taxon of peirosaurid crocodyliform, <i>Rukwasuchus yajabalijekundu</i>, gen. et sp. nov., is described on the basis of a well-preserved partial skull from the middle Cretaceous Galula Formation exposed in southwestern Tanzania. The skull is distinguished from those of other crocodyliforms by the presence of a mediolaterally narrow, elongate, and septate internal narial fenestra (choana) located anteriorly on the pterygoid; a markedly depressed posterior border of the parietal, excluding the supraoccipital from the dorsal cranial table; and a ventrally directed descending process of the postorbital with a well-developed posteroventral process. The lateral surface of the braincase is exquisitely preserved and includes a well-developed laterosphenoid bridge dividing the foramina for the three primary branches of the trigeminal nerve. In overall morphology, the holotype skull and isolated teeth compare closely with <i>Hamadasuchus rebouli</i> from the middle Cretaceous Kem Kem Beds of Morocco. Reevaluation of the problematic putative African peirosaurid taxa <i>Stolokrosuchus lapparenti</i> and <i>Trematochampsa taqueti</i> reveal a number of derived cranial characters shared with Peirosauridae and <i>Araripesuchus</i>. A close relationship between <i>Rukwasuchus</i> and other African members of Peirosauridae is supported by a parsimony analysis of Crocodyliformes. As the only known sub-Saharan peirosaurid from Africa, <i>Rukwasuchus</i> represents the only link between middle Cretaceous southern vertebrate faunas and much more abundant, taxonomically diverse, and potentially penecontemporaneous faunas from northern Africa.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at http://www.tandfonline.com/UJVP.
DOI: 10.6084/m9.figshare.1017000.v3
title: A new capitosauroid temnospondyl from the Middle Triassic upper Fremouw Formation of Antarctica

description: ABSTRACTWe describe a new capitosauroid temnospondyl, <i>Antarctosuchus polyodon</i>, gen. et sp. nov., on the basis of a large and relatively complete skull from the upper Fremouw Formation of Antarctica. The new species is characterized by its possession of numerous, extremely small maxillary, palatine, and ectopterygoid teeth, a dental pattern that suggests specialization on small prey items, possibly invertebrates. The taxon is also characterized by a parachoanal tooth row that extends far posterior to the choana and occipital condyles set close to the midline. A combination of features, including a flat skull and low occiput together with well-developed sensory canals, suggests an aquatic lifestyle. We address the phylogenetic relationships of <i>Antarctosuchus</i> by adding it to a recent cladistic analysis of Capitosauria. The revised data set includes 27 taxa and 53 characters. The results of this analysis place <i>Antarctosuchus</i> within a clade of derived Triassic stereospondyls as the sister taxon to <i>Paracyclotosaurus crookshanki</i> from the Triassic Denwai Formation of India. To date, the upper Fremouw Formation has yielded two endemic temnospondyl species (viz., <i>Kryostega collinsoni</i> and <i>Antarctosuchus polyodon</i>), although indeterminate remains referred to benthosuchids and a cranial fragment assigned to <i>Parotosuchus</i> sp. have also been noted. In contrast to the broadly distributed therapsid taxa recognized from the Middle Triassic of Antarctica (e.g., <i>Cynognathus</i>, <i>Diademodon</i>), the temnospondyl fauna suggests more limited interchange with other coeval southern Pangean basins (e.g., Karoo, Luangwa, Ruhuhu, Waterberg).SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at http://www.tandfonline.com/UJVP.
DOI: 10.6084/m9.figshare.1017004.v2
title: A new species of small-bodied sparassodont (Mammalia, Metatheria) from the middle Miocene locality of Quebrada Honda, Bolivia

description: ABSTRACTThe Sparassodonta (Mammalia, Metatheria) are a group of carnivorous mammals that dominated the macropredatory guild of South America during the Cenozoic. Here, we describe a new sparassodont based on a single specimen from the middle Miocene Quebrada Honda local fauna of southern Bolivia. This specimen (UF 27881) does not clearly correspond to any major sparassodont group (e.g., Hathliacynidae, Borhyaenidae, etc.) and represents a morphotype previously unknown among the Sparassodonta. UF 27881 is distinguished from other sparassodonts by its short, broad, borhyaenid-like rostrum and small size, among other features. However, we decline to coin a new name for UF 27881 due to the fragmentary nature of this specimen and the absence of most of its dentition. This specimen suggests that the appearance of the Sparassocynidae and several hypercarnivorous didelphid taxa (including <i>Thylophorops</i>, <i>Thylatheridium</i>, <i>Lutreolina</i>, and <i>Hyperdidelphys</i>) represent an evolutionary response to the decline in small, predatory sparassodont taxa during the late Cenozoic. This study documents new morphological diversity among the Sparassodonta and highlights the value of fossils from traditionally undersampled parts of South America.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at http://www.tandfonline.com/UJVP.
DOI: 10.6084/m9.figshare.1016998
title: <i>Eodelphis kabatensis</i>, a new name for the oldest true dolphin <i>Stenella kabatensis</i> Horikawa, 1977 (Cetacea, Odontoceti, Delphinidae), from the upper Miocene of Japan, and the phylogeny and paleobiogeography of Delphinoidea

description: ABSTRACTThe oldest reported fossil record of Delphinidae is from the late Miocene (11 Ma) of California. Reliable Miocene fossil delphinids, however, are few. <i>Eodelphis kabatensis</i> from the upper Miocene Mashike Formation (8.5-13.0 Ma), Hokkaido, northern Japan, is the oldest described Miocene delphinid including a skull. Therefore, this species is a significant clue to understanding the early evolutionary history of Delphinidae. The original taxonomic assignment of this species within the genus <i>Stenella</i> is questionable; thus, we propose a new combination for the species, <i>Eodelphis kabatensis</i> Horikawa, 1977. <i>Eodelphis</i> is a basal delphinid, and comprehensive morphological cladistic analysis, including molecular topological constraints, supported this taxonomic revision. Paleobiogeographic analyses based on the present morphological cladistic analysis and analysis under the molecular constraints suggest that the origin and early diversification of Delphinidae occurred in the middle Miocene Pacific Ocean or elsewhere, respectively.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at http://www.tandfonline.com/UJVP.
DOI: 10.6084/m9.figshare.1017002.v2
title: A new crocodyliform from the middle Cretaceous Galula Formation, southwestern Tanzania

description: ABSTRACTA new taxon of peirosaurid crocodyliform, <i>Rukwasuchus yajabalijekundu</i>, gen. et sp. nov., is described on the basis of a well-preserved partial skull from the middle Cretaceous Galula Formation exposed in southwestern Tanzania. The skull is distinguished from those of other crocodyliforms by the presence of a mediolaterally narrow, elongate, and septate internal narial fenestra (choana) located anteriorly on the pterygoid; a markedly depressed posterior border of the parietal, excluding the supraoccipital from the dorsal cranial table; and a ventrally directed descending process of the postorbital with a well-developed posteroventral process. The lateral surface of the braincase is exquisitely preserved and includes a well-developed laterosphenoid bridge dividing the foramina for the three primary branches of the trigeminal nerve. In overall morphology, the holotype skull and isolated teeth compare closely with <i>Hamadasuchus rebouli</i> from the middle Cretaceous Kem Kem Beds of Morocco. Reevaluation of the problematic putative African peirosaurid taxa <i>Stolokrosuchus lapparenti</i> and <i>Trematochampsa taqueti</i> reveal a number of derived cranial characters shared with Peirosauridae and <i>Araripesuchus</i>. A close relationship between <i>Rukwasuchus</i> and other African members of Peirosauridae is supported by a parsimony analysis of Crocodyliformes. As the only known sub-Saharan peirosaurid from Africa, <i>Rukwasuchus</i> represents the only link between middle Cretaceous southern vertebrate faunas and much more abundant, taxonomically diverse, and potentially penecontemporaneous faunas from northern Africa.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at http://www.tandfonline.com/UJVP.
DOI: 10.6084/m9.figshare.1016997
title: A new specimen of the temnospondyl <i>Australerpeton cosgriffi</i> from the late Permian of Brazil (Rio do Rasto Formation, Paraná Basin): comparative anatomy and phylogenetic relationships

description: ABSTRACTA new temnospondyl specimen from the Rio do Rasto Formation (late Permian, Paraná Basin) of south Brazil is composed of a left mandible, right pelvis, femur, tibia, and fibula. Preserved lower jaws are rare for <i>Australerpeton cosgriffi</i>, and the weak ossification of the temnospondyl postcranium renders their preservation generally uncommon. A detailed comparative description of the material allowed its assignment to <i>Australerpeton cosgriffi</i>, and yielded new information about the morphology of mandible, pelvis, and hind limb of that taxon. This long-snouted temnospondyl has uncertain affinities and has been assigned either to stereospondyl Rhinesuchidae or to archegosaurid Platyoposaurinae. Reassessment of the phylogenetic placement of <i>Australerpeton cosgriffi</i>, with information drawn from the new specimen, confirms a basal stereospondyl position, between <i>Peltobatrachus pustulatus</i> and Rhinesuchidae. The synapomorphies shared with other stereospondyls include tabular and exoccipital contacting in the paroccipital process; parasphenoid articulates with corpus of the pterygoid forming a broad contact along the lateral margins of the parasphenoid plate; internal carotid passes through the dorsal surface of the parasphenoid plate; and parasphenoid denticles field enlarged to a transverse ‘belt’ extending between the pterygoid-parasphenoid articulations. Accordingly, <i>Australerpeton cosgriffi</i> represents one of the first stereospondyls, and the oldest long-snouted member of the group. The Paraná Basin can be included within the stereospondyl ancestral range, and dispersion and diversification of this clade appears to have happened before the Permo-Triassic boundary.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at http://www.tandfonline.com/UJVP.
DOI: 10.6084/m9.figshare.1017000.v2
title: A new capitosauroid temnospondyl from the Middle Triassic upper Fremouw Formation of Antarctica

description: ABSTRACTWe describe a new capitosauroid temnospondyl, <i>Antarctosuchus polyodon</i>, gen. et sp. nov., on the basis of a large and relatively complete skull from the upper Fremouw Formation of Antarctica. The new species is characterized by its possession of numerous, extremely small maxillary, palatine, and ectopterygoid teeth, a dental pattern that suggests specialization on small prey items, possibly invertebrates. The taxon is also characterized by a parachoanal tooth row that extends far posterior to the choana and occipital condyles set close to the midline. A combination of features, including a flat skull and low occiput together with well-developed sensory canals, suggests an aquatic lifestyle. We address the phylogenetic relationships of <i>Antarctosuchus</i> by adding it to a recent cladistic analysis of Capitosauria. The revised data set includes 27 taxa and 53 characters. The results of this analysis place <i>Antarctosuchus</i> within a clade of derived Triassic stereospondyls as the sister taxon to <i>Paracyclotosaurus crookshanki</i> from the Triassic Denwai Formation of India. To date, the upper Fremouw Formation has yielded two endemic temnospondyl species (viz., <i>Kryostega collinsoni</i> and <i>Antarctosuchus polyodon</i>), although indeterminate remains referred to benthosuchids and a cranial fragment assigned to <i>Parotosuchus</i> sp. have also been noted. In contrast to the broadly distributed therapsid taxa recognized from the Middle Triassic of Antarctica (e.g., <i>Cynognathus</i>, <i>Diademodon</i>), the temnospondyl fauna suggests more limited interchange with other coeval southern Pangean basins (e.g., Karoo, Luangwa, Ruhuhu, Waterberg).SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at http://www.tandfonline.com/UJVP.
DOI: 10.6084/m9.figshare.1016982
title: Dataset showing all procedures included in analysis of polyp detection study

description: Details of all outpatient colonoscopies performed at the Norfolk and Norwich University Hospital from 1/1/2011 to 31/12/2011. Showing indications, peri-procedure medication use, polyp detection, involvement of trainees and session of the day colonoscopy was performed in and order of procedure in that session. Individual colonoscopists are indicated by a unique identifier.
DOI: 10.6084/m9.figshare.1016997.v1
title: A new specimen of the temnospondyl <i>Australerpeton cosgriffi</i> from the late Permian of Brazil (Rio do Rasto Formation, Paraná Basin): comparative anatomy and phylogenetic relationships

description: ABSTRACTA new temnospondyl specimen from the Rio do Rasto Formation (late Permian, Paraná Basin) of south Brazil is composed of a left mandible, right pelvis, femur, tibia, and fibula. Preserved lower jaws are rare for <i>Australerpeton cosgriffi</i>, and the weak ossification of the temnospondyl postcranium renders their preservation generally uncommon. A detailed comparative description of the material allowed its assignment to <i>Australerpeton cosgriffi</i>, and yielded new information about the morphology of mandible, pelvis, and hind limb of that taxon. This long-snouted temnospondyl has uncertain affinities and has been assigned either to stereospondyl Rhinesuchidae or to archegosaurid Platyoposaurinae. Reassessment of the phylogenetic placement of <i>Australerpeton cosgriffi</i>, with information drawn from the new specimen, confirms a basal stereospondyl position, between <i>Peltobatrachus pustulatus</i> and Rhinesuchidae. The synapomorphies shared with other stereospondyls include tabular and exoccipital contacting in the paroccipital process; parasphenoid articulates with corpus of the pterygoid forming a broad contact along the lateral margins of the parasphenoid plate; internal carotid passes through the dorsal surface of the parasphenoid plate; and parasphenoid denticles field enlarged to a transverse ‘belt’ extending between the pterygoid-parasphenoid articulations. Accordingly, <i>Australerpeton cosgriffi</i> represents one of the first stereospondyls, and the oldest long-snouted member of the group. The Paraná Basin can be included within the stereospondyl ancestral range, and dispersion and diversification of this clade appears to have happened before the Permo-Triassic boundary.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at http://www.tandfonline.com/UJVP.
DOI: 10.6084/m9.figshare.1016982.v1
title: Dataset showing all procedures included in analysis of polyp detection study

description: Details of all outpatient colonoscopies performed at the Norfolk and Norwich University Hospital from 1/1/2011 to 31/12/2011. Showing indications, peri-procedure medication use, polyp detection, involvement of trainees and session of the day colonoscopy was performed in and order of procedure in that session. Individual colonoscopists are indicated by a unique identifier.
DOI: 10.6084/m9.figshare.1016997.v3
title: A new specimen of the temnospondyl <i>Australerpeton cosgriffi</i> from the late Permian of Brazil (Rio do Rasto Formation, Paraná Basin): comparative anatomy and phylogenetic relationships

description: ABSTRACTA new temnospondyl specimen from the Rio do Rasto Formation (late Permian, Paraná Basin) of south Brazil is composed of a left mandible, right pelvis, femur, tibia, and fibula. Preserved lower jaws are rare for <i>Australerpeton cosgriffi</i>, and the weak ossification of the temnospondyl postcranium renders their preservation generally uncommon. A detailed comparative description of the material allowed its assignment to <i>Australerpeton cosgriffi</i>, and yielded new information about the morphology of mandible, pelvis, and hind limb of that taxon. This long-snouted temnospondyl has uncertain affinities and has been assigned either to stereospondyl Rhinesuchidae or to archegosaurid Platyoposaurinae. Reassessment of the phylogenetic placement of <i>Australerpeton cosgriffi</i>, with information drawn from the new specimen, confirms a basal stereospondyl position, between <i>Peltobatrachus pustulatus</i> and Rhinesuchidae. The synapomorphies shared with other stereospondyls include tabular and exoccipital contacting in the paroccipital process; parasphenoid articulates with corpus of the pterygoid forming a broad contact along the lateral margins of the parasphenoid plate; internal carotid passes through the dorsal surface of the parasphenoid plate; and parasphenoid denticles field enlarged to a transverse ‘belt’ extending between the pterygoid-parasphenoid articulations. Accordingly, <i>Australerpeton cosgriffi</i> represents one of the first stereospondyls, and the oldest long-snouted member of the group. The Paraná Basin can be included within the stereospondyl ancestral range, and dispersion and diversification of this clade appears to have happened before the Permo-Triassic boundary.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at http://www.tandfonline.com/UJVP.
DOI: 10.6084/m9.figshare.1016998.v1
title: <i>Eodelphis kabatensis</i>, a new name for the oldest true dolphin <i>Stenella kabatensis</i> Horikawa, 1977 (Cetacea, Odontoceti, Delphinidae), from the upper Miocene of Japan, and the phylogeny and paleobiogeography of Delphinoidea

description: ABSTRACTThe oldest reported fossil record of Delphinidae is from the late Miocene (11 Ma) of California. Reliable Miocene fossil delphinids, however, are few. <i>Eodelphis kabatensis</i> from the upper Miocene Mashike Formation (8.5-13.0 Ma), Hokkaido, northern Japan, is the oldest described Miocene delphinid including a skull. Therefore, this species is a significant clue to understanding the early evolutionary history of Delphinidae. The original taxonomic assignment of this species within the genus <i>Stenella</i> is questionable; thus, we propose a new combination for the species, <i>Eodelphis kabatensis</i> Horikawa, 1977. <i>Eodelphis</i> is a basal delphinid, and comprehensive morphological cladistic analysis, including molecular topological constraints, supported this taxonomic revision. Paleobiogeographic analyses based on the present morphological cladistic analysis and analysis under the molecular constraints suggest that the origin and early diversification of Delphinidae occurred in the middle Miocene Pacific Ocean or elsewhere, respectively.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at http://www.tandfonline.com/UJVP.
DOI: 10.6084/m9.figshare.1016980
title: Neutral and Cationic NHC-Coordinated Heavier Cyclopropylidenes

description: Cyclopropylidene as the smallest cyclic carbene with saturated backbone is a transient intermediate of the allene-propyne-cyclopropene isomerization. The incorporation of heavier Group 14 elements into the cyclopropylidene scaffold has so far been restricted to the replacement of the carbenic carbon atom by a intramolecularly base-coordinated silicon(II) center. Here we report the synthesis and characterization of NHC-coordinated heavier cyclopropylidenes (Si2GeR3X, and Si3R3Br; X = Cl, Mes; R = Tip = 2,4,6-iPr3C6H2) in which the three-membered cyclic scaffold is exclusively formed of silicon and germanium. In case of the chloro-substituted Si2Ge-cyclopropylidene, a stable heavier cycloprop-1-yl-2-ylidene cation is obtained by NHC-induced chloride dissociation.
DOI: 10.6084/m9.figshare.1016998.v3
title: <i>Eodelphis kabatensis</i>, a new name for the oldest true dolphin <i>Stenella kabatensis</i> Horikawa, 1977 (Cetacea, Odontoceti, Delphinidae), from the upper Miocene of Japan, and the phylogeny and paleobiogeography of Delphinoidea

description: ABSTRACTThe oldest reported fossil record of Delphinidae is from the late Miocene (11 Ma) of California. Reliable Miocene fossil delphinids, however, are few. <i>Eodelphis kabatensis</i> from the upper Miocene Mashike Formation (8.5-13.0 Ma), Hokkaido, northern Japan, is the oldest described Miocene delphinid including a skull. Therefore, this species is a significant clue to understanding the early evolutionary history of Delphinidae. The original taxonomic assignment of this species within the genus <i>Stenella</i> is questionable; thus, we propose a new combination for the species, <i>Eodelphis kabatensis</i> Horikawa, 1977. <i>Eodelphis</i> is a basal delphinid, and comprehensive morphological cladistic analysis, including molecular topological constraints, supported this taxonomic revision. Paleobiogeographic analyses based on the present morphological cladistic analysis and analysis under the molecular constraints suggest that the origin and early diversification of Delphinidae occurred in the middle Miocene Pacific Ocean or elsewhere, respectively.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at http://www.tandfonline.com/UJVP.
DOI: 10.6084/m9.figshare.1016980.v1
title: Neutral and Cationic NHC-Coordinated Heavier Cyclopropylidenes

description: Cyclopropylidene as the smallest cyclic carbene with saturated backbone is a transient intermediate of the allene-propyne-cyclopropene isomerization. The incorporation of heavier Group 14 elements into the cyclopropylidene scaffold has so far been restricted to the replacement of the carbenic carbon atom by a intramolecularly base-coordinated silicon(II) center. Here we report the synthesis and characterization of NHC-coordinated heavier cyclopropylidenes (Si2GeR3X, and Si3R3Br; X = Cl, Mes; R = Tip = 2,4,6-iPr3C6H2) in which the three-membered cyclic scaffold is exclusively formed of silicon and germanium. In case of the chloro-substituted Si2Ge-cyclopropylidene, a stable heavier cycloprop-1-yl-2-ylidene cation is obtained by NHC-induced chloride dissociation.
DOI: 10.6084/m9.figshare.1016998.v2
title: <i>Eodelphis kabatensis</i>, a new name for the oldest true dolphin <i>Stenella kabatensis</i> Horikawa, 1977 (Cetacea, Odontoceti, Delphinidae), from the upper Miocene of Japan, and the phylogeny and paleobiogeography of Delphinoidea

description: ABSTRACTThe oldest reported fossil record of Delphinidae is from the late Miocene (11 Ma) of California. Reliable Miocene fossil delphinids, however, are few. <i>Eodelphis kabatensis</i> from the upper Miocene Mashike Formation (8.5-13.0 Ma), Hokkaido, northern Japan, is the oldest described Miocene delphinid including a skull. Therefore, this species is a significant clue to understanding the early evolutionary history of Delphinidae. The original taxonomic assignment of this species within the genus <i>Stenella</i> is questionable; thus, we propose a new combination for the species, <i>Eodelphis kabatensis</i> Horikawa, 1977. <i>Eodelphis</i> is a basal delphinid, and comprehensive morphological cladistic analysis, including molecular topological constraints, supported this taxonomic revision. Paleobiogeographic analyses based on the present morphological cladistic analysis and analysis under the molecular constraints suggest that the origin and early diversification of Delphinidae occurred in the middle Miocene Pacific Ocean or elsewhere, respectively.SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at http://www.tandfonline.com/UJVP.