MolluscaBase taxon details
Protokionoceras Grabau & Shimer, 1910 †
1868844 (urn:lsid:marinespecies.org:taxname:1868844)
accepted
Genus
Protokionoceras medullare (J. Hall, 1868) † (type by original designation)
- Species Protokionoceras anticostiense Foerste, 1928 †
- Species Protokionoceras medullare (J. Hall, 1868) †
- Species Protokionoceras loricatum (Barrande, 1868) † accepted as Cancellspyroceras loricatum (Barrande, 1868) † (unaccepted > superseded combination)
- Species Protokionoceras oneidaense (Walcott, 1883) † accepted as Isorthoceras oneidaense (Walcott, 1883) † (unaccepted > superseded combination)
- Species Protokionoceras trusitum (J. M. Clarke & Ruedemann, 1903) † accepted as Pellucidoceras trusitum (J. M. Clarke & Ruedemann, 1903) † (unaccepted > superseded combination)
marine, brackish, fresh, terrestrial
fossil only
neuter
Grabau, A. W.; Shimer, H. W. (1910). North American index fossils, invertebrates. <em>A. G. Seiler & Company, New York.</em> 2: 909 pp., available online at https://www.biodiversitylibrary.org/page/36182786
page(s): 58 [details]
page(s): 58 [details]
MolluscaBase eds. (2026). MolluscaBase. Protokionoceras Grabau & Shimer, 1910 †. Accessed at: https://molluscabase.org/aphia.php?p=taxdetails&id=1868844 on 2026-06-06
Date
action
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The webpage text is licensed under a Creative Commons
Attribution 4.0 License
original description
Grabau, A. W.; Shimer, H. W. (1910). North American index fossils, invertebrates. <em>A. G. Seiler & Company, New York.</em> 2: 909 pp., available online at https://www.biodiversitylibrary.org/page/36182786
page(s): 58 [details]
page(s): 58 [details]
