Name:
Lariosaurus
(Lario lizard).
Phonetic: La-ree-oh-sore-us.
Named By: Curioni - 1847.
Synonyms: Deirosaurus italicus,
Eupodosaurus longobardicus, Lariosaurus carinthiacus, Macromirosaurus
plini, Macromirosaurus plinii, Proneusticosaurus carinthiacus.
Classification: Chordata, Reptilia, Sauropsida,
Nothosauria, Nothosauridae.
Species: L. balsamii (type),
L.
curioni, L.hongguoensis, L. juvenilis, L. stensioi, L.
valceresii, L. vosseveldensis, L.
xingyiensis, L.youngi.
Diet: Carnivore/Piscivore.
Size: 60 centimetres long.
Known locations: Europe, China.
Time period: Anisian to Ladinian of the Triassic.
Fossil representation: Several known specimens.
Although
small by nothosaur
standards, Lariosauru remains
one of the most
important nothosaurs known to palaeontology as remains are so well
preserved they contain the presence of juvenile Lariosaurus,
as well
as what they ate. The juvenile specimens inside an adult Lariosaurus
are very well preserved suggesting that they were not chewed or eaten,
and that Lariosaurus were possibly not
cannibalistic. As such if the
popular theory of them being young waiting to be born is correct,
then it proves that the marine reptiles had developed the ability to
give birth to live young before they were completely restricted to
aquatic life. This has long been suspected for later and larger
marine reptiles like ichthyosaurs,
plesiosaurs,
and mosasaurs
as
terrestrial movement would have been impossible for these reptiles.
While
nothosaurs in general are thought to have eaten fish, Lariosaurus
is
confirmed to have eaten other marine reptiles, specifically
placodonts
as indicated by the remains of two Cyamodus
juveniles inside
one Lariosaurus skeleton.
Lariosaurus
also seems to be a marine reptile in transition to a more aquatic
life. This is because while the rear legs were still suited to land
movement, the front legs had evolved to form paddles. This would
be a hindrance to movement on land, but a considerable bonus when
swimming in the water.
Further reading
- "Eupodosaurus longobardicus". Annals and Magazine
of Natural History,
Series 6 8:407 - G. A. Boulenger - 1891.
- The status of the sauropterygian reptile genera Ceresiosaurus,
Lariosaurus, and Silvestrosaurus
from the Middle Triassic of Europe. -
Fieldiana: Geology, new series 38:1-46. - O, Rieppel - 1998.
- A new species of Lariosaurus (Sauropterygia:
Nothosauridae) from
Triassic of Guizhou, southwest China. - Vertebrata PalAsiatica
40(2):122-126. - J.-L. Li, J. Liu & O. Rieppel - 2002.
- A new species of Lariosaurus (Reptilia,
Sauropterygia) from the
Middle Anisian (Middle Triassic) of southwestern China. - Neues
Jahrbuch f�r Geologie und Pal�ontologie-Abhandlungen 242(1):19-42.
D.-Y. Jiang, M. W. Maisch, Z.-Y. Sun, Y.-L. Sun & W.-C. Hao -
2006.
- The earliest record of the genus Lariosaurus from
the early middle
Anisian (Middle Triassic) of the Germanic Basin. - Journal of
Vertebrate Paleontology 36(4):e1163712 - N. Klein, D. F. A. Voeten, A.
Haarhuis & R. Bleeker - 2016.