Английская Википедия:Hovasaurus
Шаблон:Short description Шаблон:Automatic taxobox
Hovasaurus is an extinct genus of basal diapsid reptile. It lived in what is now Madagascar during the Late Permian and Early Triassic, being a survivor of the Permian–Triassic extinction event and the paleontologically youngest member of the Tangasauridae.[1][2] Fossils have been found in the Permian Lower and Triassic Middle Sakamena Formations of the Sakamena Group, where it is amongst the commonest fossils. Its morphology suggests an aquatic ecology.
Description
Hovasaurus resembled a slender lizard, two thirds of total length was taken up by its long tail. It had snout-vent length up to Шаблон:Convert long, with Шаблон:Convert long tail. It was well adapted to an aquatic life, with the tail being laterally flattened like that of a sea snake. Some stones have been found in the abdomen of fossil Hovasaurus, indicating the creatures swallowed these for ballast, preventing them from floating to the surface when hunting fish.[3]
Paleoenvironment
The Lower Sakamena Formation was deposited in a wetland environment situated within a North-South orientated rift valley, perhaps similar to Lake Tanganyika. The climate at the time of deposition was temperate, warm, and humid, with seasonal rainfall and possible monsoons.[4] Flora from the formation includes the equisetalean Schizoneura, Glossopteris, and seed fern Lepidopteris. Other vertebrates known from the Lower Sakamena Formation include the palaeoniscoid fish Atherstonia, the procolophonid parareptile Barasaurus, the gliding weigeltisaurid reptile Coelurosauravus, neodiapsids Claudiosaurus, Thadeosaurus, and Acerosodontosaurus, fragments of rhinesuchid temnospondyls, an indeteriminate theriodont therapsid and the dicynodont Oudenodon.[5]
References
Further reading
- Шаблон:Cite journal
- D. Lambert, D. Naish and E. Wyse 2001, "Encyclopedia of Dinosaurs and prehistoric life", p. 77, Dorling Kindersley Limited, London. Шаблон:ISBN
Шаблон:Eureptilia Шаблон:Taxonbar
Шаблон:Permian-reptile-stub
Шаблон:Triassic-reptile-stub
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite book
- ↑ Шаблон:Cite journal
- ↑ Smith, R. M. H. 2000. Sedimentology and taphonomy of Late Permian vertebrate fossil localities in Southwestern Madagascar. Paleontologia Africana 36:25–41
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- Prehistoric neodiapsids
- Prehistoric reptile genera
- Lopingian reptiles of Africa
- Early Triassic reptiles of Africa
- Changhsingian genus first appearances
- Induan genus extinctions
- Permian Madagascar
- Triassic Madagascar
- Fossils of Madagascar
- Fossil taxa described in 1926
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