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''Lycorhinus'' is a genus of heterodontosaurid ornithischian dinosaur hailing from the Early Jurassic (Hettangian to Sinemurian ages) strata of the Elliot Formation located in the Cape Province, South Africa. The fossil material consists of dentaries and maxillae, hence the characters mentioned by the name ''Lycorhinus angustidens'' that Sidney H. Haughton attributed to the remains in 1924, where the generic name means "wolf snout", as it was at first misidentified as a cynodont, and the specific descriptor means "constricted tooth".〔S.H. Haughton, 1924, "The fauna and stratigraphy of the Stormberg Series", ''Annals of the South African Museum'' 12: 323-497〕 The holotype, SAM 3606, consists of a mandible found by Dr M. Ricono. Three other species of ''Lycorhinus'' have been named. ''Lycorhinus parvidens'' was created by Robert Broom and ''Lycorhinus tucki'' by Richard Anthony Thulborn in 1970 renaming ''Heterodontosaurus tucki'',〔R.A. Thulborn, 1970, "The systematic position of the Triassic ornithischian dinosaur ''Lycorhinus angustidens''", ''Zoological Journal of the Linnean Society'' 49: 235-245〕 but these have failed to find recognition.〔Charig, A.J. and Crompton, A.W., 1974, "The alleged synonymy of ''Lycorhinus'' and ''Heterodontosaurus''", ''Annals of the South African Museum'' 64: 167-89〕 ''Lycorhinus consors'', named by Thulborn in 1974, was renamed ''Abrictosaurus'' by James Hopson in 1975.〔J.A. Hopson, 1975, "On the generic separation of the ornithischian dinosaurs ''Lycorhinus'' and ''Heterodontosaurus'' from the Stormberg Series (Upper Triassic) of South Africa", ''South African Journal of Science'' 71: 302-305〕 ''Lycorhinus'', including the remains described by Gow in 1975 as ''Lanasaurus'', is a small ( in length) herbivorous dinosaur despite the long canines it sported in its jaws; in view of this typical characteristic ''L. angustidens'' is very clearly allied to ''Heterodontosaurus''. Only in 1962 Alfred Walter Crompton recognised it was an ornithischian dinosaur. Thulborn in 1971 created a separate Lycorhinidae〔R.A. Thulborn, 1971, "Origins and evolution of ornithischian dinosaurs", ''Nature'' 234(5324): 75-78〕 but this group was in 1972 equated with Heterodontosauridae by Peter Galton. ==''Lanasaurus''== The type and only species of ''Lanasaurus'' is ''L. scalpridens'', described by Christopher Gow in 1975 from the same horizon as ''Lycorhinus''. The generic name is derived from Latin ''lana'', "wool" and Greek ''saurus'', "lizard", and honours Professor Alfred Walter Crompton, nicknamed "Fuzz" because of his woolly hair. The specific name is derived from Latin ''scalprum'', "chisel", and ''dens'', "tooth". It is based on a partial upper jaw bone, the maxilla, holotype BP/1/4244, found in the Upper Elliot Formation of Free State. The teeth show a typical replacement pattern in which during each replacement cycle every third tooth is renewed.〔C.E. Gow, 1975, "A new heterodontosaurid from the Redbeds of South Africa showing clear evidence of tooth replacement", ''Zoological Journal of the Linnean Society'' 57: 335-339〕 Gow himself in 1990 concluded that the holotype of ''Lanasaurus'' was actually a specimen of ''Lycorhinus angustidens''.〔Gow, C.E., 1990, "A tooth-bearing maxilla referable to ''Lycorhinus angustidens'' Haughton, 1924 (Dinosauria, Ornithischia)", ''Annals of the South African Museum'' 99: 367–380〕 This has been commonly accepted since.〔Norman, D.B., Sues, H.D., Witmer, L.M. and Coria, R.A.. (2004). "Basal Ornithopoda". In D. B. Weishampel, H. Osmólska, and P. Dodson (eds.), ''The Dinosauria'' (2nd edition). University of California Press, Berkeley 393-412〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lycorhinus」の詳細全文を読む スポンサード リンク
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