Taxon Description (Wikipedia)

Hexanchiformes is the order consisting of the most primitive types of sharks, and numbering just five extant species. Fossil sharks that were apparently very similar to modern sevengill species are known from Jurassic specimensAllen, 45. Hexanchiform sharks have only one dorsal fin, either six or seven gill slits, and no nictitating membrane in the eyes. The frilled shark, Chlamydoselachus anguineus, is very different from the cow sharks, and it has been proposed that it be moved to its own order Chlamydoselachiformes. full article at Wikipedia

BOLD Stats

Specimen Records:	109
Specimens with Sequences :	61
Specimens with Barcodes :	41
Public Records :	11
Species :	8
Species With Barcodes :	8
Species List - Progress	Download Sequences

Sample Sources

Imagery

Collection Sites

Collected from 14 countries. Top 20 :

Expand

unspecified [52] Australia [20] New Zealand [9] Taiwan [6] United States [5]

Philippines [4] Argentina [4] Indonesia [3] Portugal [1] Madagascar [1]

Chile [1] Italy [1] Japan [1] Namibia [1]

Taxon Occurrence (GBIF)