Ischyrhiza

Ischyrhiza is an extinct genus of sawfish from the Late Cretaceous and Early Paleogene,[3] belonging to the primitive Batoidea family Sclerorhynchidae. Fossils of the genus have been found in Canada, the United States, the Aguja Formation of Mexico, the Tamayama Formation of Japan, the Dukamaje Formation of Niger, the El Molino Formation of Bolivia, the Quiriquina Formation of Chile, and the Chota Formation of Peru.[4][5]

Ischyrhiza
Temporal range: Turonian-Thanetian
~89.3–55.8 Ma
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Chondrichthyes
Subclass:
Elasmobranchii
Superorder:
Batoidea
Order:
Pristiformes
Suborder:
†Sclerorhynchoidea
Family:
†Sclerorhynchidae
Genus:
†Ischyrhiza

Leidy, 1856
Type species
†Ischyrhiza mira
Leidy, 1856
Species
  • †I. antiquus
  • †I. avonicola Estes, 1964[1]
  • †I. marrocanus
  • †I. mira Leidy, 1856[2]
  • †I. stromeri
  • †I. texana Cappetta & Case 1975

Ischyrhiza Ischyrhiza Leidy, 1856 genus accepted Ischyrhiza mira Ischyrhiza mira (Leidy, 1856) species accepted Ischyrhiza iwakiensis Ischyrhiza iwakiensis Uyeno & Hasegawa, 1986 species accepted Ischyrhiza serra Ischyrhiza serra Nessov, 1997 species accepted Ischyrhiza nigeriensis Ischyrhiza nigeriensis Tabaste, 1963 species accepted Ischyrhiza hartenbergeri Ischyrhiza hartenbergeri Cappetta, 1975 species accepted Ischyrhiza germaniae Ischyrhiza germaniae Weiler & Albers, 1964 species accepted Ischyrhiza viaudi Ischyrhiza viaudi Cappetta, 1981 species accepted Ischyrhiza avonicola Ischyrhiza avonicola Estes, 1964 species accepted Ischyrhiza texana Ischyrhiza texana (Cappetta & Case, 1975) species accepted Ischyrhiza antiqua Ischyrhiza antiqua (Leidy, 1856) species accepted Ischyrhiza radiata Ischyrhiza radiata (Clark, 1895)

References
  1. ESTES, R. (1964) Fossil vertebrates from the Late Cretaceous Lance Formation, Eastern Wyoming. University of California Publications in Geological Sciences, 49: 1–180, 73 fig., 5 pl.
  2. Leidy (1856) - Notice of remains of extinct vertebrated animals of New-Jersey, collected by Prof. Cook of the State Geological Survey under the direction of Dr. W. Kitchell. Proceedings of the Academy of Natural Sciences of Philadelphia, 8: 220–221
  3. Fossils (Smithsonian Handbooks) by David Ward (Page 205)
  4. Ischyrhiza at Fossilworks.org
  5. The Paleobiology Database accessed on 8/21/09


Catergory:Fossil taxa described in 1856


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