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Piksi
''Piksi'' is a genus of pterosaurs containing the single species ''Piksi barbarulna'' (meaning "strange elbowed big bird ", from Blackfoot ''piksi'', "big bird" or, specifically, "chicken" and Latin ''barbarus'' "strange, outlandish" + ''ulna'', elbow〔(Varricchio 2002)〕). It lived roughly 75 million years ago in what is now Montana, United States. Known from parts of a right wing – the humerus, ulna and radius bones – the only specimens found so far are housed in the Museum of the Rockies (collection number MOR 1113). The genus ''Piksi'' is monotypic at present.
The fossils were found in 1991 by Gloria Jean Siebrecht in the Blackfeet Indian Reservation, namely at Bob's Vacation Site locality TM-088, Glacier County. Recovered from an old stratum of the upper Two Medicine Formation, they are probably from an individual that died in or near a small pool. It was described in 2002 by David J. Varricchio.
==Description and classification==
The bones are fragmentary and represent roughly the elbow area. Comparing the fossils' size to the wing bones of other ground birds, ''P. barbarulna'' seems to have been about as large as a common pheasant, i.e. some 35–40 cm (15 in) long excluding tail, and with a wingspan of perhaps 80 cm (30 in) or somewhat less. It would thus have weighed some 500 g – 1 kg (1 - 2 pounds).〔Based on the data in Snow ''et al.'' (1998).〕
The original description of the fossils found its affinities unresolvable except that it was probably an ornithothoracine bird. Agnolin and Varricchio (2012) reinterpreted ''Piksi barbarulna'' as a pterosaur rather than a bird, most likely a member of Ornithocheiroidea.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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