Stephanoberyciformes

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Stephanoberyciformes

Scopelogadus mizolepis mizolepis, a ridgehead
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Superclass:	Osteichthyes
Class:	Actinopterygii
Subclass:	Neopterygii
Infraclass:	Teleostei
Superorder:	Acanthopterygii
Order:	Stephanoberyciformes
Families
Gibberichthyidae Hispidoberycidae Melamphaidae Stephanoberycidae

The Stephanoberyciformes are an order of marine ray-finned fishes, consisting of about 45 species, the majority (37) of which belong to the ridgehead family (Melamphaidae). The Stephanoberyciformes are mostly uncommon deep-sea species with little, if any, importance to commercial fishery. They share many morphological similarities with the Beryciformes, their sister order.

Some sources^[1] classify their other close relatives, the whalefishes, as a superfamily herein, named Cetomimoidea. Most taxa traditionally placed here would then be the Stephanoberyciodea.

The families are:

Melamphaidae – ridgeheads (about 35 species)
Gibberichthyidae – gibberfishes (2 species)
Stephanoberycidae – pricklefishes (3 species)
Hispidoberycidae - Bristlyskin (1 species)

Common characteristics include a generally rounded body, a toothless palate, rather thin skull bones, and a missing orbitosphenoid bone (except for Hispidoberyx).

The gibberfishes on the other hand appear to be closer to whalefishes such as Rondeletia, as has been proposed time and again. These two groups have - apparently as only living fishes - the mysterious Tominaga's organ. Rondeletia, meanwhile, is suspected to be very close to the velvet whalefish, Barbourisia rufa.^[2]

Footnotes

↑ E.g. Nelson (2006)
↑ Paxton et al. (2001)

References

Nelson, J.S. (2006): Fishes of the World (4th ed.). ISBN 0-471-25031-7
Paxton, John R.; Johnson, G. David & Trnski, Thomas (2001): Larvae and juveniles of the deepsea "whalefishes" Barbourisia and Rondeletia (Stephanoberyciformes: Barbourisiidae, Rondeletiidae), with comments on family relationships. Records of the Australian Museum 53(3): 407-425. PDF fulltext

External links

Froese, Rainer, and Daniel Pauly, eds. (2005). "Stephanoberyciformes" in FishBase. March 2005 version.

v t e Extant Actinopterygii orders by subclass

Kingdom Animalia Phylum Chordata Subphylum Vertebrata Infraphylum Gnathostomata Superclass Osteichthyes

Chondrostei	Polypteriformes Acipenseriformes

Neopterygii	Lepisosteiformes Amiiformes Osteoglossiformes Hiodontiformes Elopiformes Albuliformes Notacanthiformes Anguilliformes Saccopharyngiformes Clupeiformes Gonorynchiformes Cypriniformes Characiformes Gobiesociformes Gymnotiformes Siluriformes Salmoniformes Esociformes Osmeriformes Argentiniformes Ateleopodiformes Stomiiformes Aulopiformes Myctophiformes Lampriformes Polymixiiformes Percopsiformes Batrachoidiformes Lophiiformes Gadiformes Ophidiiformes Mugiliformes Atheriniformes Beloniformes Cetomimiformes Cyprinodontiformes Stephanoberyciformes Beryciformes Zeiformes Gasterosteiformes Syngnathiformes Synbranchiformes Tetraodontiformes Pleuronectiformes Scorpaeniformes Perciformes

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