蛇頸龍

蛇頸龍係一個屬嘅絕咗種嘅大型海生爬行動物，屬鰭龍超目，存在於侏羅紀早期，分佈於歐洲嘅海域同包括澳洲、北美、以及亞洲等嘅太平洋地區。

外形 
蛇頸龍外形上嘅特徵如下：
佢哋身長平均有成 3 至 5 米；
個頭細，鼻哥窿近眼，啲牙又長又尖銳；
佢哋有又長又幼嘅頸，條頸有相當嘅彈性，有古生物學研究估計，佢哋喺獵食魚群嗰陣，可能曉靠左右揈個頭嚟一嘢擔走多條魚；
蛇頸龍嘅身體好似龜噉闊形，條尾比較短，而身體有兩對又大又長、好似槳噉形嘅肢體，能夠靠拍打四肢嚟游水。

尼斯湖水怪

攷

參考 
Andrews, C. W. 1896. "On the structure of the plesiosaurian skull". Quarterly Journal of the Geological Society, London, 52, 246-253.
Brown, D. S. 1981. "The English Upper Jurassic Plesiosauroidea (Reptilia) and a review of the phylogeny and classification of the Plesiosauria". Bulletin of the British Museum (Natural History): Geology, 35, (4), 253-347.
Cruickshank, A. R. I.; Small, P. G.; and Taylor, M. A. 1991. "Dorsal nostrils and hydrodynamically driven underwater olfaction in plesiosaurs". Nature, 352, 62-64.
Lydekker, R. 1889. Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural History), Part II. Containing the Orders Ichthyopterygia and Sauropterygia. British Museum (Natural History)
Richard Owen, Fossil Reptili of the Liassic Formations, pt iii. (Monogr. Palaeont. Soc., 1865)
Persson, P. O. 1963. A revision of the classification of the Plesiosauria with a synopsis of the stratigraphical and geographical distribution of the group. Lunds Universitets Årsskrift, N. F. Avd. 2. 59, 1-59.
Storrs, G. W. 1991. "Anatomy and relationships of Corosaurus alcovensis (Diapsida: Sauropterygia) and the Triassic Alcova Limestone of Wyoming". Bulletin of the Peabody Museum of Natural History, 44, 1-151.
Storrs, G. W. and Taylor, M. A. 1996. "Cranial anatomy of a new plesiosaur genus from the lowermost Lias (Rhaetian/Hettangian) of Street, Somerset, England". Journal of Vertebrate Paleontology, 16, (3), 403-420.
Storrs, G. W. 1997. "Morphological and taxonomic clarification of the genus Plesiosaurus". 145-190. In Callaway, J. M and Nicholls, E. L. (eds.). Ancient Marine Reptiles. Academic press. London.
Taylor, M. A. and Cruickshank, A. R. I. 1993. Cranial anatomy and functional morphology of Pliosaurus brachyspondylus (Reptilia: Plesiosauria) from the Upper Jurassuc of Westbury, Wiltshire. Philosophical Transactions of the Royal Society of London, Series B, 341, 399-418. 
Torrens, Hugh 1995. "Mary Anning (1799–1847) of Lyme; 'The Greatest Fossilist the World Ever Knew'". The British Journal for the History of Science, 25 (3): 257–284.

拎 

Genus Plesiosaurus - The Plesiosaur Directory.
Plesiosauroidea - Palaeos.
Plesiosauria  – Mikko's Phylogeny Archive

絕種動物