Groenlandibelidae is a family of

coleoid Subclass (biology), Subclass Coleoidea, or Dibranchiata, is the grouping of cephalopods containing all the various taxa popularly thought of as "soft-bodied" or "shell-less" (i.e., octopuses, squid and cuttlefish). Unlike its extant sister group, ...

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

s believed to belong to the

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

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 "unispec ...

, ''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. Campanian s ...

Maastrichtian The Maastrichtian () is, in the ICS geologic timescale, the latest age (uppermost stage) of the Late Cretaceous Epoch or Upper Cretaceous Series, the Cretaceous Period or System, and of the Mesozoic Era or Erathem. It spanned the interval from ...

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 Provinces and territories of Canada, province of British Columbia. The island is in length, in width at its widest point, and in total area, while are o ...

(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 st ...

''Naefia'' Wetzel, 1930

The fossil range of ''Naefia'' is from

Cenomanian The Cenomanian is, in the ICS' geological timescale, the oldest or earliest age of the Late Cretaceous Epoch or the lowest stage of the Upper Cretaceous Series. An age is a unit of geochronology; it is a unit of time; the stage is a unit in the s ...

to Campanian.

References

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