Sachicasaurus
Extinct genus of pliosaurid
From Wikipedia, the free encyclopedia
Sachicasaurus is an extinct genus of brachauchenine pliosaurid known from the Barremian of the Paja Formation, Altiplano Cundiboyacense in the Colombian Eastern Ranges of the Andes. The type species is S. vitae.
| Sachicasaurus Temporal range: Barremian ~ | |
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| Holotype specimen of Sachicasaurus. | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Superorder: | †Sauropterygia |
| Order: | †Plesiosauria |
| Suborder: | †Pliosauroidea |
| Family: | †Pliosauridae |
| Subfamily: | †Brachaucheninae |
| Genus: | †Sachicasaurus |
| Species: | †S. vitae |
| Binomial name | |
| †Sachicasaurus vitae Páramo Fonseca et al., 2018 | |
Etymology
Description
Sachicasaurus was a large pliosaur, with the type specimen measuring approximately 10 metres (33 ft) long and weighing 17 metric tons (19 short tons).[1][2] The holotype specimen, MP111209-1, was found in 2013 and is known from a near complete skull, and postcranial elements including a complete hindlimb and various vertebrae. Diagnostic features include a very short mandibular symphysis, reduced number of mandibular teeth (17 to 18 versus 25 to 40 in other pliosaurids), slender teeth, among other features. With a preserved length of 9.9 metres (32 ft) (which may be missing the vertebrae from the end of the tail), the specimen is interpreted as a sub-adult individual.[1] It is one of the largest and most complete pliosaurid specimens.[3]
Paleoenvironment
Sachicasaurus is one of four pliosaurids from the Paja Formation, others being Acostasaurus,[4] Stenorhynchosaurus,[5] and Monquirasaurus.[6] It is also contemporaneous with the elasmosaurids Callawayasaurus and Leivanectes,[7] the marine turtle Desmatochelys padillai,[8] the sandowniid turtle Leyvachelys,[9] and the ophthalmosaurid ichthyosaurs Muiscasaurus and Kyhytysuka.[10][11]
