Groenlandibelidae is a family of
coleoid
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, Nautiloidea, whose ...
cephalopods believed to belong to the
spirulids.
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. Campani ...
to
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 ...
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 by ...
(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 to Campanian.
References
Cenozoic cephalopods
Cephalopod orders
Coleoidea
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