Groenlandibelidae is an extinct family of

coleoid Coleoidea or Dibranchiata is one of the two subclasses of cephalopod molluscs containing all the various taxa popularly thought of as "soft-bodied" or "shell-less" (i.e. octopus, squid and cuttlefish). Unlike its extant sister group Nautiloide ...

cephalopod A cephalopod is any member of the molluscan Taxonomic rank, class Cephalopoda (Greek language, Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral symm ...

s believed to belong to the

spirulid Spirulida is an Order (biology), order of cephalopods comprising one extant taxon, extant species (''Spirula spirula'') and several extinction, extinct taxon, taxa. Fossil record * Oldest representative: Carboniferous, though contested: see ' ...

s. Morphologically, its taxa seem to have some belemnoid characteristics, suggesting a possible intermediate relationship.

Genera

''Groenlandibelus '' Jeletzky, 1966

Monospecific In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispe ...

, ''Groenlandibelus rosenkrantzi'' Jeletzky, 1966 (Birkelund, 1956). The fossil range is from

Campanian The Campanian is the fifth of six ages of the Late Cretaceous epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stages in the Upper Cretaceous Series. Campa ...

Maastrichtian The Maastrichtian ( ) is, in the International Commission on Stratigraphy (ICS) geologic timescale, the latest age (geology), age (uppermost stage (stratigraphy), stage) of the Late Cretaceous epoch (geology), Epoch or Upper Cretaceous series (s ...

. Some material originally was ascribed to ''Belemnoteuthis'' before being allocated its own genus.

''Cyrtobelus'' Fuchs et al 2012

Some taxa now assigned to the ''Groenlandibelus'' are now assigned to ''Cyrtobelus''. Species: * ''Cyrtobelus birkelundae'' Fuchs et al. 2012 * ''C. hornbyense'' Fuchs et al. 2012 The fossil range is from Upper Campanian to upper Maastrichtian with localities in

Vancouver Island Vancouver Island is an island in the northeastern Pacific Ocean and part of the Canadian province of British Columbia. The island is in length, in width at its widest point, and in total area, while are of land. The island is the largest ...

(BC) and

West Greenland Kitaa, originally Vestgrønland ("West Greenland"), is a former administrative division of Greenland. It was by far the most populated of the divisions, being home to almost 90% of the total population. The divisions were de facto replaced by s ...

''Naefia'' Wetzel, 1930

The fossil range of ''Naefia'' is from

Cenomanian The Cenomanian is, in the International Commission on Stratigraphy's (ICS) geological timescale, the oldest or earliest age (geology), age of the Late Cretaceous epoch (geology), Epoch or the lowest stage (stratigraphy), stage of the Upper Cretace ...

to Campanian.

References

Cenozoic cephalopods Cephalopod orders Spirulida {{paleo-mollusc-stub