Topic
Cricosaurus
About: Cricosaurus is a research topic. Over the lifetime, 6 publications have been published within this topic receiving 178 citations.
Papers
TL;DR: This new species of Cricosaurus has peculiar enamel ornamentation, characterized by numerous, fine apicobasally aligned ridges, when compared to other species of the genus.
Abstract: Upper Jurassic (Tithonian) deposits in north-western Patagonia, Argentina, have yielded rich and taxonomically diverse assemblages of marine reptiles. These assemblages are also remarkable by their quality of preservation and are represented by ichthyosaurs, plesiosaurs, turtles and crocodyliforms. Despite the abundant crocodyliform record, only two metriorhynchid taxa have been identified: Cricosaurus araucanensis and Dakosaurus andiniensis. Here we described a new species of Cricosaurus, which represents the second species of Cricosaurus in the Tithonian of the Neuquen Basin, and the first metriorhynchid found in lithographic limestone from Gondwana. Furthermore, this specimen has the most complete postcranial remains of any metriorhynchid from South America. The new species is characterized by a short distance between the premaxilla and the nasal, a relatively narrow interorbital width, 23–25 mandibular teeth, bicarinated teeth with fine apicobasally aligned ridges, interalveolar spaces between the first seven teeth approximately 1.5 times longer than the anteroposterior diameter of the respective alveoli. To test the assignment of the new species to Cricosaurus, we carried out two phylogenetic analyses. In both analyses, Cricosaurus lithographicus sp. nov. is nested with other species referred to this genus. This new species has peculiar enamel ornamentation, characterized by numerous, fine apicobasally aligned ridges, when compared to other species of the genus.
51 citations
27 Dec 2015
TL;DR: A description of the natural endocasts of the brain of Cricosaurus araucanensis is made together with a synthesis of the advances in the knowledge of these four taxa that were performed during the last years.
Abstract: Fil: Herrera, Laura Yanina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Division Paleontologia Vertebrados; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas; Argentina
19 citations
TL;DR: Cricosaurus represents one of the most important radiations within Metriorhynchidae, a specialized marine clade of Crocodylomorpha that flourished in marine environments from the Middle Jurassic un...
Abstract: Cricosaurus represents one of the most important radiations within Metriorhynchidae, a specialized marine clade of Crocodylomorpha that flourished in marine environments from the Middle Jurassic un...
6 citations
TL;DR: In this paper, a partial skull of a new species of Cricosaurus is described from the lower Berriasian of the Vaca Muerta Formation (Neuquen Basin, Argentina).
TL;DR: A new and exceptionally well-preserved skeleton of the metriorhynchid thalattosuchian Cricosaurus from the upper Kimmeridgian Torleite Formation of Painten in Bavaria (Germany) is described in this article.
Abstract: Herein we describe a new and exceptionally well-preserved skeleton of the metriorhynchid thalattosuchian Cricosaurus from the upper Kimmeridgian Torleite Formation of Painten in Bavaria (Southern Germany). The specimen is articulated, shows soft-tissue preservation, and represents one of the most complete metriorhynchid skeletons known. The exceptional preservation allows us to explore the morphological variation of the tail region in the Metriorhynchidae, a part of the skeleton that has long been neglected. Based on our description and phylogenetic analyses, we name this specimen Cricosaurus albersdoerferi sp. nov. Our phylogenetic analyses recover a Cricosaurus subclade composed of four species from Southern Germany and one from Argentina. We provide revised diagnoses for the Southern German members of this subclade, revealing the presence of at least four closely-related Cricosaurus species in the upper Kimmeridgian-early Tithonian of Southern Germany. Interestingly, within this subclade there is evidence of rapid change in tail construction and feeding ecology. However, there is no evidence of sympatry between these taxa, and the two species known from the same ammonite subzone are exclusively found in different northernTethys lagoons. Most interesting, however, is the variation in the skulls, dorsal neural spines, the tail displacement units, and flukes between these different species. This previously unexplored variation within Metriorhynchidae hints to differences in locomotory abilities between different species. Sven Sachs. Naturkunde-Museum Bielefeld, Abteilung Geowissenschaften, Adenauerplatz 2, 33602 Bielefeld, Germany, and Im Hof 9, 51766 Engelskirchen, Germany. Sachs.Pal@gmail.com Mark T. Young. School of GeoSciences, Grant Institute, University of Edinburgh, James Hutton Road, Edinburgh, EH9 3FE, UK. Mark.Young@ed.ac.uk Pascal Abel. Senckenberg Centre for Human Evolution and Palaeoenvironment, Eberhard-KarlsUniversität Tübingen, Sigwartstraße 10, 72076 Tübingen, Germany pascal.abel@ifg.uni-tuebingen.de], Heinrich Mallison. Palaeo3D, Dorfstr. 11, 86641 Rain am Lech, Germany and CeNak, Universität SACHS ET AL.: A NEW Cricosaurus SPECIES 2 Hamburg, Martin-Luther-King-Platz 3, 20146 Hamburg, Germany. mallison@palaeo3d.com
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 3 |
| 2015 | 1 |
| 2013 | 1 |
| 2009 | 1 |