Sixgill stingray

Taxobox
name = Sixgill stingrays

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image_width = 250px
image_caption =
regnum = Animalia
phylum = Chordata
classis = Chondrichthyes
subclassis = Elasmobranchii
ordo = Rajiformes
familia = Hexatrygonidae
genus = "Hexatrygon"
genus_authority = Heemstra & Smith, 1980
subdivision_ranks = Species
subdivision = See text

The sixgill stingrays are a family, Hexatrygonidae, of rays containing a single genus, "Hexatrygon". They are native to the coastal and oceanic waters off South Africa.

They are distinguished by their possession of six gill openings (other rays have five), and by the two spines in their tails.

pecies

Several species have been described, including:
* "Hexatrygon bickelli" Heemstra & Smith, 1980.
* "Hexatrygon longirostra" (Chu & Meng, 1981).
* "Hexatrygon taiwanensis" Shen, 1986.
* "Hexatrygon yangi" Shen & Liu, 1984.

However, these are very similar and it is possible that they represent a single species.

References

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