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Home > Art, Film & Photography > Basal Pygostylia: Piksi, Elopteryx, Longipteryx, Polarornis, Gargantuavis, Abavornis, Incolornis
Basal Pygostylia: Piksi, Elopteryx, Longipteryx, Polarornis, Gargantuavis, Abavornis, Incolornis

Basal Pygostylia: Piksi, Elopteryx, Longipteryx, Polarornis, Gargantuavis, Abavornis, Incolornis


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Purchase includes free access to book updates online and a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: Piksi barbarulna is a prehistoric bird. It lived roughly 75-76 million years ago in what is now Montana, USA. 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 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. The bones are fragmentary and represent roughly the elbow area. They show a mix of characters known since very primitive birds (such as Confuciusornis) and others known from living taxa such as chickens. In addition, there are autapomorphies hitherto unknown in other birds, in accordance with which the specific name was chosen: both the dorsal epicondyle of the humerus and the dorsal cotyla of the ulna are consicuously large and well-developed. 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 15 in (3540 cm) long excluding tail, and with a wingspan of perhaps 30 in (80 cm) or somewhat less. It would thus have weighed maybe 1 - 2 pounds (some 500 g - 1 kg). The cladistic analysis - essentially limited to characters of the elbow joint - found these to be phylogenetically quite uninformative; it was not even possible to distinguish Neornithes from Enantiornithes. Still, it provided a valuable hint, not for the phylogeny but for the morphology of P. barbarulna: apart from the autapomorphies, the... More: http://booksllc.net/?id=12724477


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Product Details
  • ISBN-13: 9781157487111
  • Publisher: Books LLC
  • Publisher Imprint: Books LLC
  • Height: 152 mm
  • No of Pages: 32
  • Spine Width: 2 mm
  • Weight: 59 gr
  • ISBN-10: 1157487114
  • Publisher Date: 31 May 2010
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Sub Title: Piksi, Elopteryx, Longipteryx, Polarornis, Gargantuavis, Abavornis, Incolornis
  • Width: 229 mm


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