Synonyms for chenanisuchus or Related words with chenanisuchus
Examples of "chenanisuchus"
" is the most basal known dyrosaurid.
lateroculi" is referred to Dyrosauridae by Jouve "et al." (2005), based on three morphological characters:
Two specimens of "C. lateroculi" – OCP DEK-GE 262 (holotype, nearly complete skull with mandibular fragments) and OCP DEK-GE 61 (nearly complete skull) – come from the Sidi Chenane area in Morocco, which is Late Palaeocene (Thanetian) in age. Fossils of "
" were also found in Maastrichtian age strata in Mali, what shows that "
" survived the Cretaceous–Paleogene extinction event.
lateroculi" has an estimated adult length between 4 and 4.5 meters, based on the 60 centimeter long skull. It has the shortest snout relative to the dorsal skull length among all dyrosaurids.
("Chenane crocodile") is a genus of dyrosaurid crocodyliform from the Late Cretaceous of Mali and the Late Palaeocene of Sidi Chenane in Morocco. It was described in 2005, after expeditions uncovered it in 2000.
A phylogenetic analysis of dyrosaurids by Hastings "et al." (2010) placed "Cerrejonisuchus" relatively basally in the dyrosaur clade between "Phosphatosaurus gavialoides" and "Arambourgisuchus khouribgaensis". "Cerrejonisuchus" was not found to be closely related to the other short-snouted dyrosaur "
", which was placed at the base of the clade. Although it might be expected that "
" and "Cerrejonisuchus" are closely related because they are the only dyrosaurids with short snouts, the results of the analysis show that snout proportions alone are not indicative of phylogenetic relatedness in dyrosaurs.
Relative to the entire skull length, the rostrum of "Cerrejonisuchus" is the shortest of any dyrosaurid. It, along with "
", are the only short-snouted dyrosaurids. The snout of "Cerrejonisuchus" is narrow and consistent in width from the external nares, or nostril openings, to the orbits, or eye sockets. The margin of the snout, unlike that of many long-snouted dyrosaurids, is smooth rather than festooned. "Festooned" refers to the lateral undulations in the maxillae and premaxillae that form around the tooth sockets, or alveoli. The external nares are positioned extremely anteriorly at the very tip of the snout. The orbits are oriented anterodorsally, facing upward and slightly forward. The dentition of "Cerrejonisuchus" is generally homodont, although the third maxillary tooth is enlarged and the fourth is somewhat smaller than the rest. They are conical, labiolingually compressed, each having a relatively rounded apex. The carinae, or tooth edges, are strongly developed both anteriorly and posteriorly. The premaxillary teeth are generally thinner and longer than the maxillary teeth. Like "
", "Cerrejonisuchus" visibly lacks striations on the tooth surfaces. Unlike many other dyrosaurids, including "Dyrosaurus maghribensis", "Atlantosuchus coupatezi", "Guarinisuchus munizi", "Phosphatosaurus gavialoides", and "Sokotosuchus ianwilsoni", the teeth of "Cerrejonisuchus" are not curved.
"Phosphatosaurus" is considered to be a basal dyrosaurid, and is often positioned near the base of phylogenetic trees of dyrosaurids. An early phylogenetic analysis by Buffetaut (1978), not based on a cladistic data matrix, puts "Phosphatosaurus" at the base of the tree due to the presence of many primitive characters in the genus. Later phylogenetic analyses, such as the one by Jouve (2005), have also shown "Phosphatosaurus" to be a basal member of the family. In most analyses, "Phosphatosaurus" and "Sokotosuchus" form a clade. These two genera are more closely related to one another than to any other genus of dyrosaurid. More recent phylogenetic studies have considered "
", a short-snouted dyrosairid named in 2005, to be even more basal than the clade containing "Phosphatosaurus" and "Sokotosuchus".
Anthracosuchus (meaning "coal crocodile" in Greek) is an extinct genus of dyrosaurid crocodyliform from the Paleocene of Colombia. Remains of Anthracosuchus balrogus, the only known species, come from the Cerrejón Formation in the Cerrejón mine, and include four fossil specimens with partial skulls. "Anthracosuchus" differs from other dyrosaurids in having an extremely short (brevirostrine) snout, widely spaced eye sockets with bony protuberances around them, and osteoderms that are smooth and thick. It is one of the most basal dyrosaurids along with "
" and "Cerrejonisuchus". The species name is a reference to the Balrog, a creature in J. R. R. Tolkien's fantasy novel "The Lord of the Rings" that could, like the remains of "Anthracosuchus", be found in a mine.
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