Phragmoteuthida
| Phragmoteuthida | |
|---|---|
| File:Hard parts of the Phragmoteuthida, Belemnitida and Diplobelida.png | |
| Comparation of hard parts of Phragmoteuthida, Belemnitida and Diplobelida | |
| Scientific classification Edit this classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Superorder: | †Belemnoidea |
| Order: | †Phragmoteuthida Jeletzky in Sweet, 1964 |
| Families | |
|
See text. | |
Phragmoteuthida is an order of extinct coleoid cephalopods[1] characterized by a fan-like teuthoid pro-ostracum attached to a belemnoid-like phragmocone.
Diagnosis
Jeletzky[1] characterized phragmoteuthids as having a large tripartite, fanlike pro-ostracum forming the longest portion of the shell, attached to about three-quarters of the circumference of a comparatively small breviconic phragmocone with short camerae and superficially belemnitid-like siphuncle, an absent or much reduced rostrum at the apical part of the phragmocone, belemnite-like arm hooks, an ink sack, beaks resembling those of Recent teuthids, and a muscular mantle. Donovan (2006), gives a similar description for Phragmoteuthis: Phragmocones as having an apical angle of between 20 and 30 degrees, and relatively few chambers compared with belemnoids; a multi-layered conotheca, thick-walled siphuncle, and a long, three-lobed pro-ostracum as in the Triassic species. Arms are short and bear pairs of slightly curved hooks.[2]
Classification
- Order †Phragmoteuthida
- Family †Phragmoteuthididae
- Genus †Permoteuthis
- Genus †Phragmoteuthis
- "unnamed form"
- Family †Rhiphaeoteuthidae
- Genus †Rhiphaeoteuthis
- Family †Phragmoteuthididae
References
- ↑ 1.0 1.1 Doguzhaeva, L. (2002). "Adolescent bactritoid, orthoceroid, ammonoid and coleoid shells from the Upper Carboniferous and Lower Permian of the South Urals" (PDF). Abhandlungen der Geologischen Bundesanstalt. 57: 9–55.
- ↑ Donovan, D.T. (May 2006). "Phragmoteuthida (Cephalopoda: coleoidea) from the Jurassic of Dorset, England". Palaeontology. 49 (3): 673–684. doi:10.1111/j.1475-4983.2006.00552.x. S2CID 128893474.
{{cite journal}}: CS1 maint: date and year (link)
Error: "Q7188058" is not a valid Wikidata entity ID.