Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: ParaHoxozoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Cephalopoda
Subclassis: †Ammonoidea
Ordo: †Ammonitida
Subordo: †Ammonitina
Superfamilia: †Perisphinctoidea
Familiae: Aspidoceratidae - Berriasellidae - Craspeditidae - Neocomitidae - Olcostephanidae - Parkinsoniidae - Perisphinctidae - Polyptychitidae - Reineckeidae - Tulitidae
Name
Perisphinctoidea Steinmann 1890
Synonyms
Perisphinctaceae Steinmann 1890
Perisphinctoidea, formerly Perisphinctaceae, is a superfamily of Middle Jurassic (Bajocian) to Lower Cretaceous (Barremian) ammonites, commonly with evolute shells with strong ribbing that typically divides about mid flank before crossing the venter.[1]
Classification
Some 16 families have been recognized in the Perisphinctoidea. The following is based on Donovan et al. 1981[2] with modification from the Treatise on Invertebrate Paleontology, Part L (1957)[1]
Perisphinctidae: Middle and Upper Jurassic root stock, derived from the Stephanoceratidae
(Middle Jurassic direct derivatives of the Perisphinctidae)
Morphiceratidae
Tulitidae
Reineckeiidae
Pachyceratidae
Aspidoceratidae
(early Upper Jurassic (Oxfordian) derivatives of Perisphinctidae)
Aulacostephanidae
Ataxioceratidae
(mid Upper Jurassic (Kimmeridgian) derivatives of the Ataxioceratidae)
Dorsoplanitidae
Virgatitidae
(late Upper Jurassic (Tithonian) derivatives of Perisphinctidae)
Simoceratidae
Himalayitidae
Olcostephanidae
Holcodiscidae (indirect, from Olcostaphanidae)(now placed in the suberfamily Desmoceratoidea)
(Lower Cretaceous Perisphinctoidea (Berriasan - Hauterivien)
Berriasellidae (derived from Ataxioceratidae)(now considered a subfamily of Neocomitidae)
Polytichitidae [=Craspeditidae] (derived from Dorsoplanitidae)
Neocomitidae (derived from Berriasellidae)(now placed in the superfamily Endemoceratoidea)
Oosterellidae (Hauterivian derivative of the Neocomitidae)
References
Wikispecies has information related to Perisphinctoidea.
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Arkell, W.J.; Kummel, B.; Wright, C.W. (1957). Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Lawrence, Kansas: Geological Society of America and University of Kansas Press.
Donovan, Callomon and Howarth 1981 Classification of the Jurassic Ammonitina; Systematics Association. "Archived copy" (PDF). Archived from the original (PDF) on 2011-07-16. Retrieved 2010-11-20.
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