Incertae sedis (fossils)
Species

Tettragonis sulcata Eichwald, 1855

https://files.geocollections.info/large/6a/af/6aaf295e-6702-4d2f-bdbc-3efdb32543a6.jpghttps://files.geocollections.info/large/7c/7e/7c7e12d9-fb6f-4511-8035-f0d30e6cda74.jpghttps://files.geocollections.info/large/16/1a/161a1a6f-1f9b-4ea3-9ce8-7707ceb5ab38.jpghttps://files.geocollections.info/large/19/7e/197eb2d9-00c3-40b5-a3e2-79682d13a2ef.jpghttps://files.geocollections.info/large/ca/88/ca888ba9-18e5-47cb-b980-ea5826591e36.jpghttps://files.geocollections.info/large/2e/6d/2e6df195-bb5b-45e1-8528-d05333cb7c6e.jpghttps://files.geocollections.info/large/2d/bf/2dbfef09-a60f-4c0c-8da6-2f7b532e321b.jpghttps://files.geocollections.info/large/12/6f/126fbd36-bd99-449f-a9bd-0ba97bb04c02.jpghttps://files.geocollections.info/large/b9/f2/b9f2e0fa-e803-46b9-bf55-93a05e04ce85.jpghttps://files.geocollections.info/large/bc/6e/bc6ef0d5-40a1-4ea1-9c35-d1c14a7441ec.jpg
Type specimen data
holotype : St. Peterburi University 1/97 , Kirna ,
Synonymy list
1855     Tetragonis sulcata — Eichwald , pp. 465
1857     Tetragonis sulcata — Eichwald , pp. 33
1860     Tetragonis sulcata m. — Eichwald , pp. 432 , fig. 27:5
1861     Tetragonis sulcata — Eichwald , pp. 83 , fig. VI 5
1979     Tetragonis sulcata dEichwald, 1860 — Brummer , pp. 31 , fig. 2-15
1999     Tettragonis sulcata — Nitecki et al. , pp. 29 , fig. 2.6
Selection of related publications
Brummer, G. J. A. 1979. Palaeobiology of Tetragonis sulcata d'Eichwald, 1860, an Ordovician receptaculite in erratics from the northern Netherlands. Scripta Geologica 53, 1-40.
Eichwald, E. 1855. Beitrag zur geographischen Verbreitung der fossilen Thiere Russlands. Alte Periode. Bulletin de la Société Imperiale des Naturalistes de Moscou 28, 4, 433-466.
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References based on distribution