Hagryphus

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Hagryphus
Speculative outline drawing of Hagryphus with the fossilized left hand skeleton.

Speculative outline drawing of Hagryphus with the fossilized left hand skeleton.

Temporal occurrence
Upper Cretaceous (late Campanium )
76 to 75 million years
Locations
Systematics
Theropoda
Coelurosauria
Maniraptora
Oviraptorosauria
Caenagnathidae
Hagryphus
Scientific name
Hagryphus
Zanno & Sampson , 2005
Art
  • Hagryphus giganteus
Approximate size comparison to a modern human

Hagryphus was a theropod dinosaur from the group of Oviraptorosauria from the Upper Cretaceous North America , which is known only by a left hand and fragmentary arm and foot bones. This genus was first described in 2005 by Zanno and Sampson with the only species Hagryphus giganteus . Within the Oviraptorosauria, Hagryphus is one of the Caenagnathidae .

Hagryphus was one of the largest Oviraptorosauria with an estimated length of 3 meters and was 30 to 40% larger than Chirostenotes . From the related genera Elmisaurus and Chirostenotes , Hagryphus can be distinguished by features on the hand bones found; the first and second fingers are more robust, while the first metacarpal and phalanx I-1 were proportionally shorter.

Find and naming

The only find so far ( holotype , catalog number UMNH VP 12765) comes from the Grand Staircase-Escalante National Monument in Utah ( USA ). Stratigraphically , the site belongs to the Kaiparowits Formation , which is characterized by its dinosaur fauna; Hagryphus shared its habitat with dromaeosaurids , troodontids , Parasaurolophus , Gryposaurus and Ornithomimus, among others .

Radiometric dating shows that the sediments of the site were deposited between 76 and 75 million years ago (late Campanian ). The find consists of an incomplete, anatomically connected left hand including the carpal bones and the complete phalanxes 1, 2 and 3, with the second phalanx missing the claw (ungual). The distal (lower) part of the spoke (radius) and fragmentary metatarsal and toe bones are also known. The find is now housed in the Utah Museum of Natural History in Salt Lake City .

Hagryphus giganteus means something like "gigantic griffin of Ha" and is derived from the Egyptian desert god Ha , the ancient Greek gryphus (" griffin ", a mythological, bird-like hybrid ) and gigas ("giant").

literature

Individual evidence

  1. ↑ a b Eric M. Roberts, Alan L. Deino, Marjorie A. Chan: 40 Ar / 39 Ar age of the Kaiparowits Formation, southern Utah, and correlation of contemporaneous Campanian strata and vertebrate faunas along the margin of the Western Interior Basin. In: Cretaceous Research. Vol. 26, No. 2, 2005, pp. 307-318, doi : 10.1016 / j.cretres.2005.01.002 .
  2. ^ Lindsay E. Zanno, Scott D. Sampson, A new caenagnathid specimen from the Kaiprowits Formation (Late Campanian) of Utah. In: Journal of Vertebrate Paleontology. Vol. 23, Supplement to No. 3 = Abstracts of Papers Sixty-Third Annual Meeting Society of Vertebrate Paleontology. Science Museum of Minnesota St. Paul, Minnesota, October 15-18, 2003 , 2003, p. 114A.
  3. ↑ Michael Mortimer: Oviraptorosauria. In: The Theropod Database. Archived from the original on January 29, 2013 ; Retrieved July 30, 2014 .

Web links

Commons : Hagryphus  - collection of images, videos and audio files