MolluscaBase name details
Protocycloceratidae Kobayashi, 1935 †
1781766 (urn:lsid:marinespecies.org:taxname:1781766)
unaccepted > junior subjective synonym
Family
Endocycloceratidae Ulrich, Foerste, A. K. Miller & Unklesbay, 1944 † · unaccepted > junior subjective synonym
marine, brackish, fresh, terrestrial
fossil only
Kobayashi, T. (1935). Suggestions for the natural classification and benthonic adaptation of early uncoiled nautiloids. <em>Proceedings of the Imperial Academy.</em> 12: 296–298., available online at https://doi.org/10.2183/pjab1912.11.435 [details]
MolluscaBase eds. (2026). MolluscaBase. Protocycloceratidae Kobayashi, 1935 †. Accessed at: https://molluscabase.org/aphia.php?p=taxdetails&id=1781766 on 2026-05-02
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original description
Kobayashi, T. (1935). Suggestions for the natural classification and benthonic adaptation of early uncoiled nautiloids. <em>Proceedings of the Imperial Academy.</em> 12: 296–298., available online at https://doi.org/10.2183/pjab1912.11.435 [details]
basis of record Kröger, B.; Landing, E. (2009). Cephalopods and paleoenvironments of the Fort Cassin Formation (upper Lower Ordovician), eastern New York and adjacent Vermont. <em>Journal of Paleontology.</em> 83(5): 664-693., available online at https://doi.org/10.1666/08-181.1 [details] Available for editors
[request]
additional source Kröger, B.; Pohle, A. (2021). Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen – a pelagic fauna with Laurentian affinities. <em>European Journal of Taxonomy.</em> 783(1): 1-102., available online at https://doi.org/10.5852/ejt.2021.783.1601 [details]
basis of record Kröger, B.; Landing, E. (2009). Cephalopods and paleoenvironments of the Fort Cassin Formation (upper Lower Ordovician), eastern New York and adjacent Vermont. <em>Journal of Paleontology.</em> 83(5): 664-693., available online at https://doi.org/10.1666/08-181.1 [details] Available for editors
[request]additional source Kröger, B.; Pohle, A. (2021). Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen – a pelagic fauna with Laurentian affinities. <em>European Journal of Taxonomy.</em> 783(1): 1-102., available online at https://doi.org/10.5852/ejt.2021.783.1601 [details]
