''Plaesiomys'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of extinct lamp shells belonging to the family

Plaesiomyidae Plaesiomyidae is a family of extinct lamp shells belonging to the order Orthida. Fossil record Fossils of Plaesiomyidae are found in marine strata from the Ordovician until the Silurian The Silurian ( ) is a geologic period and system span ...

Fossil record

Fossils of ''Plaesiomys'' are found in marine strata of the

Ordovician The Ordovician ( ) is a geologic period and System (geology), system, the second of six periods of the Paleozoic Era (geology), Era, and the second of twelve periods of the Phanerozoic Eon (geology), Eon. The Ordovician spans 41.6 million years f ...

(age range: from 466.0 to 443.7 years ago.) of Canada, China, Europe and United States.Paleobiology Database
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Species

*†''Plaesiomys anticostiensis'' (Shaler, 1865) *†''Plaesiomys bellistriatus'' Wang, 1949 *†''Plaesiomys carletona'' Twenhofel, 1928 *†''Plaesiomys fidelis'' Popov ''et al.'', 2000 *†''Plaesiomys iphigenia'' (Billings, 1865) *†''Plaesiomys multiplicata'' Bancroft, 1945 *†''Plaesiomys porcata'' (McCoy, 1846) *†''Plaesiomys proavitus'' Winchell and Schuchert, 1892 *†''Plaesiomys rockymontana'' Wilson, 1926 *†''Plaesiomys saxbiana'' Oraspold, 1959 *†''Plaesiomys subquadrata'' (Hall, 1847)

References

{{Taxonbar, from=Q24883856 Prehistoric brachiopod genera Rhynchonellata Paleozoic life of Ontario Verulam Formation Paleozoic life of British Columbia Paleozoic life of Manitoba Paleozoic life of the Northwest Territories Paleozoic life of Nunavut Paleozoic life of Quebec Orthida