Bactroceras Holm 1898
Genus Bactroceras Holm, 1898 Type species Bactroceras avus Holm, 1898; Middle Ordovician, late Darriwilian Stage, Seby Limestone Formation; Öland, Sweden; by original designation. Diagnosis Slender, orthocones or weakly curved cyrtocones with sub-circular or circular conch cross section; apical angl...
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Zenodo
2021
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Online Access: | https://dx.doi.org/10.5281/zenodo.5793510 https://zenodo.org/record/5793510 |