''Cricotus'' is an extinct genus of

Embolomeri Embolomeri is an order of tetrapods or stem-tetrapods, possibly members of Reptiliomorpha. Embolomeres first evolved in the Early Carboniferous ( Mississippian) Period and were the largest and most successful predatory tetrapods of the Late Carb ...

. It was erected by Cope in 1875, on the basis of fragmentary, not clearly associated remains including caudal vertebrae, on which the name was established (in fact, based on a single intercentrum), as well as a few other postcranial bones. It was little-used in the subsequent literature, contrary to '' Archeria'', which appears to be a junior synonym of ''Cricotus''. However, given that the type species of ''Cricotus'' (''C. heteroclitus'') is a nomen dubium, the name ''Cricotus'' is unavailable. This is why Holmes Holmes R. 1989
The skull and axial skeleton of the Lower Permian anthracosauroid amphibian
''Archeria crassidisca'' Cope. Palaeontographica Abt. A Palaeozoologie – Stratigraphie 207: 161-206. suggested using the name '' Archeria'' for this taxon, though he provided no evidence that he made a formal appeal to the

International Commission on Zoological Nomenclature The International Commission on Zoological Nomenclature (ICZN) is an organization dedicated to "achieving stability and sense in the scientific naming of animals". Founded in 1895, it currently comprises 26 commissioners from 20 countries. Orga ...

for this (and presumably did not do it).

References

Embolomeres Carboniferous tetrapods of North America {{carboniferous-animal-stub