MolluscaBase taxon details
Harrisoceras rectum (Worthen, 1875) †
1884311 (urn:lsid:marinespecies.org:taxname:1884311)
accepted
Species
Orthoceras (Euorthoceras) rectum Worthen, 1875 † · unaccepted > superseded combination
Orthoceras rectum Worthen, 1875 † · unaccepted > superseded combination
- Variety Harrisoceras rectum var. junior Foerste, 1889 † (uncertain > taxon inquirendum)
marine, brackish, fresh, terrestrial
fossil only
(of Orthoceras rectum Worthen, 1875 †) 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 [from synonym] [view taxon] [details]
MolluscaBase eds. (2026). MolluscaBase. Harrisoceras rectum (Worthen, 1875) †. Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1884311 on 2026-07-02
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original description
(of Orthoceras rectum Worthen, 1875 †) 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]
basis of record 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, pl. 49, fig. 7, 8 [details] Available for editors
[request]
page(s): 504, pl. 26, fig. 3 [details]
basis of record 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, pl. 49, fig. 7, 8 [details] Available for editors
[request]
Present Inaccurate Introduced: alien Containing type locality
