Holopeidae Cossmann, 1908
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https://doi.org/10.4202/app.01208.2024 |
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persistent identifier |
https://treatment.plazi.org/id/EC118355-FF98-AB2E-FCFA-BA7F5F37BF90 |
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treatment provided by |
Felipe |
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scientific name |
Holopeidae Cossmann, 1908 |
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Family Holopeidae Cossmann, 1908 View in CoL Genus Holopea Hall, 1847
Type species: Holopea symmetrica Hall, 1847 , by subsequent designation of Bassler (1915); from the Chatfieldian, Upper Ordovician of North America.
Remarks.— Wagner (2002) recognized Holopea as a derived genus with reduced shell structures and suggested that it was restricted to the Ordovician. Tremadocian–Floian, Lower Ordovician species have been described from Canada ( Billings 1865) and North Korea ( Kobayashi 1931) but the majority of species range through the Sandbian and Katian, Upper Ordovician; the youngest species occur in the Hirnantian, uppermost Ordovician of Estonia ( Koken and Perner 1925) and Canada ( Twenhofel 1928) (see Ebbestad et al. 2013).
Stratigraphic and geographic range.—Upper Ordovician; North America, Europe, North Korea, Baltic region, and South America.
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