Spirula spirula is a small, muscular species (45 mm ML) found in mesopelagic waters of the tropical open ocean.
A list of all nominal genera and species in the Spirulidae can be found here.
The list includes the current status and type species of all genera, and the current status, type repository and type locality of all species and all pertinent references.
tolweb.org /Spirula_spirula/19989 (1183 words)
NationMaster - Encyclopedia: Spirulida(Site not responding. Last check: )
Orders Sepiida Sepiolida Spirulida Teuthida Octopoda Vampyromorphida Nautilida The Cephalopods (head-foot) are the mollusc class Cephalopoda characterized by bilateral body symmetry, a prominent head, and a modification of the mollusc foot into the form of arms or tentacles.
Orders Sepiida Sepiolida Spirulida Teuthida Octopoda Vampyromorphida Subclass Coleoidea is the grouping of cephalopods containing all the primarily soft_bodied creatures.
Suborders Myopsina Oegopsina Squids are the large, diverse group of marine mollusks, popular as food in cuisines as widely separated as the Japanese and the Italian.
The order Spirulida contains a single living species.
The list includes the current status and type species of all genera, and the current status, type repository and type locality of all species and all pertinent references.
Young, Richard E. Spirulida Haeckel, 1896, Spirulidae Owen, 1836.
Two other orders of decapodiform cephalopods are also called squid, although they are taxonomically distinct from Teuthida and differ recognizably in their gross anatomical features.
The Vampire Squid, however, is more closely related to the octopuses than to any of the squids.
www.ufaqs.com /wiki/en/sq/Squid.htm (617 words)
Squid(Site not responding. Last check: )
Two other orders of decapodiform cephaopods are also called squid, although they are taxonomically disctinct from Teuthida and differ recognizably in their gross anatomical features.
The Cephalopods ("head-foot") are the mollusc class Cephalopoda characterized by bilateral body symmetry, a prominent head, and a modification of the mollusc foot into the form of arms or tentacles.
Two other orders of decapodiform cephalopods are also called squid, although they are taxonomically distinct from Teuthida and differ recognizably in their gross anatomical features.
Die Kalmare (Teuthida) stellen mit rund 300 Arten die grö
Gemeinsam mit den Echten Tintenfischen (Sepiida), den Zwergtintenfischen (Sepiolida) und dem Posthöhrnchen (Spirula spirula), das allein eine eigene Gruppe Spirulida darstellt, bilden sie die Gruppe der Zehnarmigen Tintenfische (Decapoda).
Der Mantel ist in der Regel keilförmig und wird durch einen flachen Gladius aus Horn, der die Funktion eines Innenskeletts hat, in Form gehalten.
An orthocone formerly referred to Bactritida (?Ammonoidea) is referred to Spirulida (Coleoidea) because of the lack of a nacreous layer.
Seems the Spirulida and this Orthocone have 2 prismatic layers.
Doguzhaeva, L., Mapes, R., and Mutvei, H., 1999, A Late Carboniferous Spirulid Coleoid from the Southern Mid-Continent (USA) Shell Wall Ultrastructure and Evolutionary Implications, in: Advancing Research on Living and Fossil Cephalopods, edited by Oloriz and Rodriguez-Tovar.
