''Antiquatonia'' is an

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of brachiopod belonging to the order

Productida Productida is an extinct order of brachiopods in the extinct class Strophomenata. Members of Productida first appeared during the Silurian. They represented the most abundant group of brachiopods during the Permian period, accounting for 45-70% ...

and family Productidae. Specimens have been found in

Carboniferous The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ...

beds across many continents, suggesting the genus had a cosmopolitan distribution. Species level taxonomy of ''Antiquatonia'' is in need of revision.

Description

Like other members of Productinae, ''Antiquatonia'' had a deep corpus cavity, a geniculate profile with long trails, and well-developed marginal structures such as ear baffles. This genus had thick, halteroid ventral spines. The ears were flanked by a ridge of ventral spines, with complimentary internal lateral ridges.

Classification

Muir-Wood & Cooper (1960) placed ''Antiquatonia'' in the subfamily Dictyoclostinae, though later analyses would find it to belong in Productinae instead. Leighton & Maples (2002) conducted multiple phylogenetic analyses which are strongly in agreement that ''Antiquatonia'' forms a clade with ''

Diaphragmus ''Diaphragmus'' is an extinct genus of brachiopod belonging to the order Productida and family Linoproductidae. Specimens have been found in Carboniferous The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 ...

'' and '' Spinocarinifera''. The results of their phylogenetic analyses are displayed in the cladogram below:

References

{{Taxonbar, from=Q113463639 Paleozoic animals Productida Prehistoric brachiopod genera