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126 results for “Crocodylomorpha”
Data from: A peirosaurid mandible from the Albian (Lower Cretaceous) of Algeria and the taxonomic content of Hamadasuchus (Crocodylomorpha, Peirosauridae)
<p><span>Peirosaurids form an extinct clade of terrestrial crocodylomorphs known from the Cretaceous of Africa and South America. Here, we describe a new mandibular ramus attributable to <em>Hamadasuchus</em> cf. <em>rebouli</em> from the Albian/Cenomanian of La Gara Samani (Algeria). We propose an emended diagnosis for this taxon, originally described from a left dentary fragment from the Kem Kem beds of Morocco and discuss the assignation of the specimens currently referred to it. Using ontogenetic series of extant crocodylians, we show that several mandibular characters commonly used to differentiate between close taxa instead record intraspecific or ontogenetic variability. On the other hand, reliable mandibular characters allow us to propose that the current taxonomic content of <em>Hamadasuchus</em> <em>rebouli</em> should be reduced to three specimens, pending future description of relatable cranial remains that will confirm or not this hypothesis. Finally, we demonstrate the importance of mandibular characters in phylogenies, by recovering the new specimen from La Gara Samani as closely related to North African peirosaurids on the basis of a data matrix designed solely on mandibular characters.</span></p>
Data from: Evaluating growth in Macrospondylus bollensis (Crocodylomorpha: Teleosauroidea) in the Toarcian Posidonia Shale, Germany
<p>The dataset includes raw data (S1 - S3), .txt files (S3) and R codes (S3). Raw data is comprised of bone element measurements. S3 is a compressed .zip folder which includes all data (code, raw and additional) that pertains to our (1) ANCOVA and (2) evolutionary allometry analyses. We have decided to keep all these files together in one folder for better access and to not mix them with our ontogenetic data. </p>
Combined palaeohistological and isotopic inferences of thermometabolism in extinct Neosuchia, using Goniopholis and Dyrosaurus (Pseudosuchia: Crocodylomorpha) as case studies
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Data from: Evaluating growth in Macrospondylus bollensis (Crocodylomorpha: Teleosauroidea) in the Toarcian Posidonia Shale, Germany
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Data from: A peirosaurid mandible from the Albian (Lower Cretaceous) of Algeria and the taxonomic content of Hamadasuchus (Crocodylomorpha, Peirosauridae)
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Data from: Limited convergence in the postcranium of aquatic crocodylomorpha
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Figure 25 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 25. Comparative plate of thalattosuchian distal tails. A, the machimosaurid teleosauroid Macrospondylus bollensis, referred specimen SMNS 51584; B, the early diverging metriorhynchoid Pelagosaurus typus, referred specimen MTM M62 2516; C, the metriorhynchid Thalattosuchus superciliosus, referred specimen GPIT-PV-31590; D, the metriorhynchid Cricosaurus bambergensis, holotype NKMB-P-Watt14/274. All scale bars equal 10 cm. Highlighting the shift in distal tail morphology as thalattosuchians became increasingly aquatic, culminating in the hypocercal tail of metriorhynchids. Note the variation in tail fluke morphology within Metriorhynchidae.
Figure 27 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 27. Comparative plate of metriorhynchid skulls in lateral view. A, the rhacheosaurin Cricosaurus suevicus, lectotype SMNS 9808; B, the early diverging Thalattosuchus superciliosus, lectotype MNHN.F RJN 256; C, the dakosaurin Dakosaurus maximus, neotype SMNS 8203. All scale bars equal 10 cm.
Figure 23 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 23. Comparative plate of thalattosuchian coracoids and forelimbs. A, the teleosaurid teleosauroid Platysuchus multiscrobiculatus, holotype SMNS 9930; B, the machimosaurid teleosauroid Macrospondylus bollensis, referred specimen NMW 13445; C, the early diverging metriorhynchoid Pelagosaurus typus, referred specimen FWD 0784; D, the metriorhynchid Cricosaurus bambergensis, holotype NKMB-P-Watt14/274. All scale bars equal 5 cm. Highlighting the changes as thalattosuchians became increasingly aquatic, such as the flattened and 'double fan'-shaped coracoids, proportional reduction and flattening of the forelimb elements, and modification of the manus into a flipper.
Figure 26 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 26. Comparative plate of metriorhynchid skulls in dorsal view. A, the early diverging Thalattosuchus superciliosus, lectotype MNHN.F RJN 256; B, the rhacheosaurin Cricosaurus araucanensis, holotype MLP 72-IV-7-1; C, the dakosaurin Dakosaurus andiniensis, referred specimen MOZ-PV 6146. All scale bars equal 10 cm.
Figure 21 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 21. Comparative plate of teleosauroid crania in dorsal view. A, the teleosaurid Mystriosaurus laurillardi, referred specimen NHMUK PV OR 14781 (holotype of Steneosaurus brevior); B, the aeolodontin teleosaurid Mycterosuchus nasutus, holotype NHMUK PV R 2617; C, the machimosaurid Macrospondylus bollensis, referred specimen NHMUK PV R 5703; D, the machimosaurid Charitomenosuchus leedsi, referred specimen NHMUK PV R 3806; E, the machimosaurin machimosaurid Lemmysuchus obtusidens, holotype NHMUK PV R 3168. All scale bars equal 20 cm. Note, all of these species were previously referred to the genus Steneosaurus, highlighting that taxonomic lumping and paraphyletic genera obscure morphological variation.
Figure 20 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 20. The type specimens of the non-neothalattosuchian thalattosuchian Plagiophthalmosuchus gracilirostris. A, holotype NHMUK PV OR 14792, nearly complete skeleton in dorsal view; B, paratype NHMUK PV OR 15500, skull in lateral view. Scale bar for A equals 30 cm, and the scale bar for B equals 10 cm.
Figure 18 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 18. Comparative plate of extant crocodylian and thalattosuchian internal braincase anatomy. The extant gavialid Gavialis gangeticus, referred specimen UF-herp-118998, in lateral view (A) and in occipital view (B). The non-neothalattosuchian Plagiophthalmosuchus cf. gracilirostris, NHMUK PV OR 33095, in lateral view (C) and in occipital view (D). The early diverging metriorhynchoid Pelagosaurus typus, referred specimen NHMUK PV OR 32599, in lateral view (E) and in occipital view (F). The rhacheosaurin metriorhynchid Cricosaurus araucanensis, holotype MLP 72-IV-7-1, in lateral view (G) and in occipital view (H). All scale bars equal 5 cm. Highlighting the reduction
Figure 19 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 19. Comparative plate of extant crocodylian and thalattosuchian internal rostral anatomy (A–G in dorsal view and H–I in lateral view). A, extant gavialid Gavialis gangeticus, referred specimen UF-herp-118998; B, non-neothalattosuchian Plagiophthalmosuchus gracilirostris, paratype NHMUK PV OR 15500; C, extant gavialid Tomistoma schlegelii, referred specimen USNM 211322; D, early diverging metriorhynchoid Pelagosaurus typus, referred specimen NHMUK PV OR 32599; E, extant crocodylid Crocodylus rhombifer, referred specimen MNB AB50.0171; F, H, rhacheosaurin metriorhynchid Cricosaurus araucanensis, holotype MLP 72-IV-7-1; G, I, geosaurin metriorhynchid Torvoneustes coryphaeus, holotype MJML K1863. All scale bars equal 5 cm. Highlighting how apneumatic thalattosuchian rostra were, that the preorbital fenestrae were decoupled from the paranasal sinus system, and how the enlarged salt glands expanded the posterior nasal cavity in metriorhynchoids. For details on the computed tomography scans and internal descriptions, see: Cowgill et al. 2023. Abbreviations: ant fen, antorbital fenestra; antorb, antorbital sinus of the paranasal sinus system; exp, expansion of the nasal cavity; max, maxillary diverticulum of the paranasal sinus system; max cec, maxillary cecal recess; nc, nasal cavity; pre fen, preorbital fenestra; post, postvestibular sinus.
Figure 15 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 15. Boxplots of the tree distance metrics for the equal weights' analyses. A, shared phylogenetic information; B, mutual clustering information; C, Nye et al. (2016) metrics.
Figure 14 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 14. Boxplots of the stratigraphic analysis metrics for the extended implied weighting (k = 15) analyses. A, stratigraphic congruence index (SCI); B, relative completeness index (RCI); C, Manhattan stratigraphic measure (MSM*); D, gap excess ratio (GER).
Figure 16 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 16. Boxplots of the tree distance metrics for the extended implied weighting (k = 15) analyses. A, shared phylogenetic information; B, mutual clustering information; C, Nye et al. (2016) metrics.
Figure 17 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 17. Comparative plate of thalattosuchian skulls in lateral view. A, non-neothalattosuchian Plagiophthalmosuchus gracilirostris, paratype NHMUK PV OR 15500; B, the teleosaurid teleosauroid Mystriosaurus laurillardi, referred specimen NHMUK PV OR 14781 (holotype of Steneosaurus brevior); C, the early diverging metriorhynchoid Pelagosaurus typus, referred specimen NHMUK PV OR 32599; D the metriorhynchid 'Metriorhynchus' brachyrhynchus, referred specimen NHMUK PV R 3804 (holotype of 'Met'. cultridens). Highlighting that only teleosauroids had dorsolaterally oriented orbits (convergent with extant crocodylians), and that orbit size dramatically increased within Metriorhynchoidea.
Figure 13 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 13. Boxplots of the stratigraphic analysis metrics for the equal weights' analyses. A, stratigraphic congruence index (SCI); B, relative completeness index (RCI); C, Manhattan stratigraphic measure (MSM*); D, gap excess ratio (GER).
Figure 12 in The history, systematics, and nomenclature of Thalattosuchia (Archosauria: Crocodylomorpha)
Figure 12. The extended implied weighting (k = 15), tethysuchian constraint strict consensus topology (C4). Length = 4189, fit = 112.271, CI = 0.301, RI = 0.829, RC = 0.249, HI = 0.699, number of most parsimonious cladograms = 4500. Phylogeny pruned to highlight Thalattosuchia (see Supporting Information, Appendix S2, Fig. S10 for the entire topology). A, Crocodylomorpha; B, Crocodyliformes; C, Metasuchia; D, Neosuchia; E, Thalattosuchia; F, Neothalattosuchia; G, Teleosauridae; H, Teleosaurinae; I, Aeolodontini; J, Machimosauridae; K, Machimosaurinae; L, Machimosaurini; M, Euthalattosuchia; N, Metriorhynchidae; O, Metriorhynchinae; P, Rhacheosaurini; Q, Geosaurinae; R, Geosaurini. Green lines highlight non-neothalattosuchian thalattosuchians, orange lines highlight teleosauroid thalattosuchians, and blue lines highlight metriorhynchoid thalattosuchians. Images from PhyloPics.org, with the teleosauroid by Scott Hartman, and the metriorhynchid by Dmitry Bogdanov (vectorized by T. Michael Keesey), the only change made was to their colouration, and their license is: https://creativecommons.org/licenses/by/3.0/.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.