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Attenborosaurus

From Wikipedia, the free encyclopedia

Attenborosaurus
Temporal range: Early Jurassic, 196.5–189.6 Ma
Casts of the holotype specimen (NHMUK R1339): one showing the left side view of the thorax (top) and another showing the underside of the body and right side view of the neck and skull (bottom), Natural History Museum
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Superorder: Sauropterygia
Order: Plesiosauria
Family: Pliosauridae
Genus: Attenborosaurus
Bakker, 1993
Species:
A. conybeari
Binomial name
Attenborosaurus conybeari
Bakker, 1993
Synonyms

Attenborosaurus is an extinct genus of pliosaurid from the Early Jurassic of Dorset, England. The type species is A. conybeari. The genus is named after David Attenborough,[1] the species after William Conybeare.[2]

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Transcription

History

Casts of the referred specimen NHMUK OR40140/R1360 which was previously considered a type for Plesiosaurus laticeps, Natural History Museum

The original remains of the holotype, specimen PV OR 38525, were discovered in Charmouth, Dorset, England in 1880[3] and was described in 1881[2] before being housed at the Bristol City Museum and Art Gallery, where a cast was taken of NHMUK R1339 and sent to the Natural History Museum in London by William Johnson Sollas, c. 1881,[2] where it stayed until the holotype was destroyed in November 1940, during World War II, leaving only plaster casts of the remains to be studied; the type cast (specimen NHMUK R1339) is now housed at the Natural History Museum, London along with a referred specimen (specimen NHMUK OR40140/R1360; includes no head, neck or tail, most of the body, ribs and all flippers except for the front right) and another partial specimen, including a skull and postcrania purchased by E.C. Day in 1866 (specimen NHMUK OR40140), also from Dorset.[3] At first the animal was thought to be another Plesiosaurus species by William Johnson Sollas in 1881,[2] but after studies on the plaster casts made after the remains, Plesiosaurus conybeari was assigned to a new genus (Attenborosaurus) by Robert T. Bakker in 1993.[1]

Description

Life restoration with Asteroceras obtusum

Judging by the holotype, which is the partial remains of one single specimen, the length of the animal was about 4.3 m (14 ft).[2][4] Much like its plesiosaur cousins, it was piscivorous. From the skin impression found with the bones, which was later destroyed, it is presumed that the creature had membranous skin, devoid of any significantly large scales, probably for decreasing water resistances.[1]

Classification

The following cladogram follows an analysis by Benson & Druckenmiller (2014).[5]

 Plesiosauria 

Stratesaurus

Eoplesiosaurus

Plesiosauroidea

Rhomaleosauridae

Pliosauridae

Thalassiodracon

Hauffiosaurus

Attenborosaurus

Marmornectes

Thalassophonea

Peloneustes

"Pliosaurus" andrewsi

Simolestes

Liopleurodon

"Liopleurodon" rossicus

Pliosaurus

Gallardosaurus

Brachauchenius

Kronosaurus

Megacephalosaurus

See also

References

  1. ^ a b c Bakker, R. T. (1993). Plesiosaur extinction cycles - events that mark the beginning, middle and end of the Cretaceous. Geological Association of Canada, Special Paper 39:641–664
  2. ^ a b c d e Sollas, W.J. (1881). "On a new species of Plesiosaurus (P. Conybeari) from the Lower Lias of Charmouth; with observations on P. megacephalus, Stutchbury, and P. brachycephalus, Owen" (PDF). Quarterly Journal of the Geological Society of London. 37: 440–480.
  3. ^ a b "Attenborosaurus: a celebrity reptile". nhm.ac.uk. Retrieved 10 September 2021.
  4. ^ Ketchum, H. F.; Smith, A. S. (2010). "The anatomy and taxonomy of Macroplata tenuiceps (Sauropterygia, Plesiosauria) from the Hettangian (Lower Jurassic) of Warwickshire, United Kingdom" (PDF). Journal of Vertebrate Paleontology. 30 (4): 1069–1081. doi:10.1080/02724634.2010.483604. S2CID 85081282.
  5. ^ Benson, R. B. J.; Druckenmiller, P. S. (2013). "Faunal turnover of marine tetrapods during the Jurassic-Cretaceous transition". Biological Reviews. 89 (1): 1–23. doi:10.1111/brv.12038. PMID 23581455. S2CID 19710180.

External links

This page was last edited on 16 March 2024, at 00:52
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