Perisphinctoidea

Short description: Extinct superfamily of ammonites

Perisphinctoidea

Temporal range: Bajocian–Barremian

PreЄ

Idoceras balderum
Scientific classification
Domain:  | Eukaryota
Kingdom:  | Animalia
Phylum:  | Mollusca
Class:  | Cephalopoda
Subclass:  | †Ammonoidea
Order:  | †Ammonitida
Suborder:  | †Ammonitina
Superfamily:  | †Perisphinctoidea
Steinmann, 1890
Families

See text

Synonyms

* Perisphinctaceae

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

1. ↑ 1.0 1.1 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.
2. ↑ Donovan, Callomon and Howarth 1981 Classification of the Jurassic Ammonitina; Systematics Association. "Archived copy". http://www.rogov.zwz.ru/Donovan, Callomon, 1981_J Ammon.PDF.

Wikidata ☰ Q7168769 entry

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