MolluscaBase name details
Orthoceras rectum Worthen, 1875 †
1884332 (urn:lsid:marinespecies.org:taxname:1884332)
unaccepted > superseded combination
Species
marine, brackish, fresh, terrestrial
fossil only
Worthen, A. H. & Meek, F. B. (1875). Palaeontology of Illinois, Section 2, Descriptions of invertebrates. <em>Geological Survey of Illinois.</em> 6: 489–532, pls 23–33., available online at https://www.biodiversitylibrary.org/page/40423327
page(s): 504, pl. 26, fig. 3 [details]
page(s): 504, pl. 26, fig. 3 [details]
Type locality contained in Illinois
type locality contained in Illinois [details]
MolluscaBase eds. (2026). MolluscaBase. Orthoceras rectum Worthen, 1875 †. Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1884332 on 2026-08-01
Date
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The webpage text is licensed under a Creative Commons
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original description
Worthen, A. H. & Meek, F. B. (1875). Palaeontology of Illinois, Section 2, Descriptions of invertebrates. <em>Geological Survey of Illinois.</em> 6: 489–532, pls 23–33., available online at https://www.biodiversitylibrary.org/page/40423327
page(s): 504, pl. 26, fig. 3 [details]
new combination reference Flower, R. H. (1939). <i>Harrisoceras</i>, a new structural type of orthochoanitic nautiloid. <em>Journal of Paleontology.</em> 13: 473-480., available online at https://www.jstor.org/stable/1298514
page(s): 476 [details] Available for editors
[request]
page(s): 504, pl. 26, fig. 3 [details]
new combination reference Flower, R. H. (1939). <i>Harrisoceras</i>, a new structural type of orthochoanitic nautiloid. <em>Journal of Paleontology.</em> 13: 473-480., available online at https://www.jstor.org/stable/1298514
page(s): 476 [details] Available for editors
[request]
Present Inaccurate Introduced: alien Containing type locality
