Hexanchiformes
Sign in to saveThe Hexanchiformes /hɛkˈsæŋkɪfɔːrmiːz/ are a primitive order of sharks, numbering just five extant species in two families, Chlamydoselachidae and Hexanchidae. Chlamydoselachidae are also known as frilled sharks, these sharks are very rare fishes and typically reside in deeper waters. Hexanchidae are also known as cow sharks and are the lesser known of the two types of Hexanchiformes and also reside in deep waters.
OverviewAI-generated
Hexanchiformes is an order of animals within the class Elasmobranchii and phylum Chordata. The taxon was described by Compagno in 1973 and holds an accepted status. It is commonly referred to as grauwe haaien.
Organisms in this order inhabit marine and brackish environments. The United States is listed as a country with records for this group, specifically through the UCMP institution.
The taxon has 108,292 occurrences recorded in the GBIF database. Additionally, it is referenced by 345 other encyclopedia articles.
Synthesized by Vinony from 22 facts across 6 sources: Wikidata, GBIF, Gbif Occ, WoRMS, iDigBio, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.
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Encyclopedic overview
12 sectionsContents
- Taxonomy
- Description
- Distribution
- Reproductive biology
- Classification
- Living species
- Extinct species
- Species
- See also
- Footnotes
- References
- External links
The Hexanchiformes /hɛkˈsæŋkɪfɔːrmiːz/ are a primitive order of sharks, numbering just five extant species in two families, Chlamydoselachidae and Hexanchidae. Chlamydoselachidae are also known as frilled sharks, these sharks are very rare fishes and typically reside in deeper waters. Hexanchidae are also known as cow sharks and are the lesser known of the two types of Hexanchiformes and also reside in deep waters.
== Taxonomy == Due to their primitive anatomy, hexanchiforms were previously considered the most basal group of sharks. However, more recent phylogenetic studies indicate that while primitive, they in fact belong to the superorder Squalomorphi, which also contains dogfishes, angelsharks, and sawsharks, although they are thought to be the most basal member of the group.
Excerpted from Wikipedia’s “Hexanchiformes” article, available under the CC BY-SA 4.0 licence.