Blancotherium
Temporal range: Clarendonian
~
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Proboscidea
Family: †Gomphotheriidae
Genus: †Blancotherium
May, 2019
Type species
†Blancotherium buckneri
(Sellards, 1940)

Blancotherium (meaning "Blanco Creek beast") is an extinct genus of gomphotheriid proboscidean from Texas. [1] Originally named Gnathabelodon "buckneri", the genus consists solely of type species B. buckneri.[1]

Etymology

Blancotherium's generic name is derived from Blanco Creek, Texas, and the Greek thēria "beast, animal". The specific epithet is named for the Buckner Ranch, where the holotype was discovered.[1]

Description

Blancotherium is known a wide variety of cranial remains, including two skulls (TMM 30896-390 and TMM 30896-570), two isolated lower tusks (TMM 30896-530 and TMN 30896-526). and several mandibular fragments.[1] The tusks are long and laterally compressed, curving gently upward. They lack an enamel band and do not spiral. The lower tusks are small and oval-shaped, and in contrast to the upper tusks, possess enamel bands. Mandibles from the most mature known individuals have elongated symphyses, and evidence that they had lower tusks is ambiguous. The shape of the mandibles varies, but they generally possessed long, narrow symphyses. Some specimens suggest the anterior end of the symphysis is bilobed in structure. The intermediate molars are trilophodont in structure, while the third molars commonly exhibit four well-developed ridges, with a smaller fifth ridge and a posterior heel, which consists of 2-3 conules. The molars are primarily hypsodont, and include conules in the valleys between the primary ridges.[1]

Paleoecology

The fauna and flora of the Lapara Creek locality, which Blancotherium is known from are consistent with the other localities within the Clarendonian North American Stage. This suggests a mixed woodland-grassland environment situated on a broad floodplain with a number of rivers.[1]

References

  1. 1 2 3 4 5 6 May, SR; 2019 "The Lapara Creek Fauna: Early Clarendonian of south Texas, USA". Palaeontologia Electronica (22.1.15)1-129

Further reading

  • Sellards, E.H. 1940. New Pliocene mastodon. Bulletin of the Geological Society of America, 51:1659-1664. https://doi.org/10.1130/GSAB-51-1659
  • Chunxiao Li, Shi-Qi Wang, Dimila Mothé & Xijun Ni (2019) New fossils of early and middle Miocene Choerolophodon from northern China reveal a Holarctic distribution of Choerolophodontidae, Journal of Vertebrate Paleontology, DOI: 10.1080/02724634.2019.1618864
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