Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Selachimorpha
Order: Symmoriida
Zangerl, 1981


Symmoriida is an extinct order of sharks that contains three families. It was synonymized subjectively with Cladodontida by Lund (1986); it was corrected as Symmoriiformes by Maisey (2008). It was assigned to Cladoselachii by Goto et al. (1988); to Elasmobranchii by Williams (1998); and to Chondrichthyes by Sepkoski in 2002 and by Maisey in 2008.

File:Stethacanthus BW.jpg

Fossil distribution

Fossil evidence of Symmoriida have been found at Bear Gulch, Fergus County, Montana,[1] Bethel Quarry, Pike County, Indiana, Kinshozan quarry, Akasaka, Gifu Prefecture, Japan, and Bashkortostan, Russian Federation.[2]


  1. ^ R. Lund. 1982. Harpagofututor volsellorhinus new genus and species (Chondrichthyes, Chondrenchelyiformes) from the Namurian Bear Gulch Limestone, Chondrenchelys problematica Traquair (Visean), and their sexual dimorphism. 56(4):938-958, authorized by John Alroy, Paleobiology Database: Bear Gulch site
  2. ^ A. Ivanov. 2005. Early Permian chondrichthyans of the middle and south Urals. Revista Brasileira de Paleontologia 8(2):127-138


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