Chlamydoselachidae

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Chlamydoselachidae
Temporal range: Late Cretaceous (Turonian) - present
Specimen of Chlamydoselachus anguineus from Japan
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Subdivision: Selachimorpha
Order: Hexanchiformes
Suborder: Chlamydoselachoidei
Berg and Svetovidov, 1955
Family: Chlamydoselachidae
Garman, 1884
Genera
Synonyms
  • Chlamydoselachiformes

Chlamydoselachidae is a family of primitive deep-sea sharks in the order Hexanchiformes. They are one of only two extant families in the order alongside the cow sharks in the family Hexanchidae, and the only members of the suborder Chlamydoselachoidei.[1][2]

They are now represented only by two extant species in the genus Chlamydoselachus: the frilled shark (C. anguineus) and the Southern African frilled shark (C. africana). However, they are thought to have been more diverse during the Late Cretaceous, where all three extant and extinct genera are known, and one other genus (Rolfodon) survived up to the Miocene. The earliest remains of the family are indeterminate teeth from the Turonian of Japan.[3] Members of this family appear to have always been closely associated with deep-sea habitats. Some extinct taxa such as Rolfodon goliath and Dykeius could grow to very large sizes.[4]

Species[edit]

The following taxa are known:

References[edit]

  1. ^ "FAMILY Details for Chlamydoselachidae - Frilled sharks". fishbase.mnhn.fr. Retrieved 2023-11-30.
  2. ^ "Chlamydoselachus - Chlamydoselachidae - Sharks | Species | Shark-References". shark-references.com. Retrieved 2023-12-14.
  3. ^ Masatoshi, Goto; Research, The Japanese Club for Fossil Shark Tooth (2004). "Tooth remains of chlamydoselachian sharks from Japan and their phylogeny and paleoecology". Earth Science (Chikyu Kagaku). 58 (6): 361–374. doi:10.15080/agcjchikyukagaku.58.6_361.
  4. ^ Cappetta, Henri; Morrison, Kurt; Adnet, Sylvain (2019-12-10). "A shark fauna from the Campanian of Hornby Island, British Columbia, Canada: an insight into the diversity of Cretaceous deep-water assemblages". Historical Biology. 33 (8): 1121–1182. doi:10.1080/08912963.2019.1681421. ISSN 0891-2963.