MolluscaBase taxon details
Archinacella instabilis (Billings, 1865) †
1673355 (urn:lsid:marinespecies.org:taxname:1673355)
accepted
Species
Archinacella instabilis var. incurvata Ulrich & Scofield, 1897 † · unaccepted > junior subjective synonym
Metoptoma instabilis Billings, 1865 † · unaccepted > superseded combination
- Variety Archinacella instabilis var. incurvata Ulrich & Scofield, 1897 † accepted as Archinacella instabilis (Billings, 1865) † (unaccepted > junior subjective synonym)
marine, brackish, fresh, terrestrial
fossil only
(of Metoptoma instabilis Billings, 1865 †) Billings, E. (1861-1865). Palaeozoic fossils. Volume I. Containing descriptions and figures of new or little known species of organic remains from Silurian rocks. 1: 1-426. Geological Survey of Canada (publication dates according to preface: 1-24 [Nov 1861], 25-56 [Jan 1862], 57-168 [Jun 1862], 169-344 [Feb 1865], 345-436 [Oct 1865])., available online at https://www.biodiversitylibrary.org/page/13779194
page(s): 251, fig. 236 [details]
page(s): 251, fig. 236 [details]
MolluscaBase eds. (2025). MolluscaBase. Archinacella instabilis (Billings, 1865) †. Accessed at: https://molluscabase.org/aphia.php?p=taxdetails&id=1673355 on 2025-09-11
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original description
(of Metoptoma instabilis Billings, 1865 †) Billings, E. (1861-1865). Palaeozoic fossils. Volume I. Containing descriptions and figures of new or little known species of organic remains from Silurian rocks. 1: 1-426. Geological Survey of Canada (publication dates according to preface: 1-24 [Nov 1861], 25-56 [Jan 1862], 57-168 [Jun 1862], 169-344 [Feb 1865], 345-436 [Oct 1865])., available online at https://www.biodiversitylibrary.org/page/13779194
page(s): 251, fig. 236 [details]
original description (of Archinacella instabilis var. incurvata Ulrich & Scofield, 1897 †) Ulrich, E. O.; Scofield, W. H. (1897). The Lower Silurian Gastropoda of Minnesota. <em>The Geology of Minnesota.</em> 3(2): 813-1081, pls. 61-82., available online at https://www.biodiversitylibrary.org/page/14923788
page(s): 835, pl. 5, figs. 21-23 [details]
status source Rohr, D. M.; Boyce, W. D.; Measures, E. A. (2008). THE MIDDLE ORDOVICIAN MOLLUSC ARCHINACELLA FROM THE TABLE POINT FORMATION (TABLE HEAD GROUP), WESTERN NEWFOUNDLAND. <em>Newfoundland and Labrador Department of Natural Resources, Geological Survey.</em> Report 08-1, pp. 93-99.
page(s): 95, pl. 1, plate figures 1-17; Pl. 2, plate figures 1-5 [details] Available for editors
[request]
page(s): 251, fig. 236 [details]
original description (of Archinacella instabilis var. incurvata Ulrich & Scofield, 1897 †) Ulrich, E. O.; Scofield, W. H. (1897). The Lower Silurian Gastropoda of Minnesota. <em>The Geology of Minnesota.</em> 3(2): 813-1081, pls. 61-82., available online at https://www.biodiversitylibrary.org/page/14923788
page(s): 835, pl. 5, figs. 21-23 [details]
status source Rohr, D. M.; Boyce, W. D.; Measures, E. A. (2008). THE MIDDLE ORDOVICIAN MOLLUSC ARCHINACELLA FROM THE TABLE POINT FORMATION (TABLE HEAD GROUP), WESTERN NEWFOUNDLAND. <em>Newfoundland and Labrador Department of Natural Resources, Geological Survey.</em> Report 08-1, pp. 93-99.
page(s): 95, pl. 1, plate figures 1-17; Pl. 2, plate figures 1-5 [details] Available for editors
[request]