Cephalopoda
Species

Discoceras antiquissimum (Eichwald, 1842)

https://files.geocollections.info/large/7b/22/7b22ae83-7424-44bc-9655-4a9a72b2b10a.jpghttps://files.geocollections.info/large/a7/50/a7500551-8056-4457-8887-e78d26ae1a30.jpghttps://files.geocollections.info/large/2f/ef/2fef7ac2-0c5d-4b63-a96d-48d2721990ec.jpghttps://files.geocollections.info/large/10/52/10522544-dd67-4045-8ddc-7a0ad1dab42a.jpghttps://files.geocollections.info/large/f3/2c/f32cd1e8-eea7-494a-9245-29c3fbb920cc.jpghttps://files.geocollections.info/large/bf/9b/bf9bf98c-6285-4e45-ae54-810d991bbfc0.jpghttps://files.geocollections.info/large/db/43/db435327-96aa-4829-a1ec-b27f5f1c9eb8.jpghttps://files.geocollections.info/large/62/d7/62d720e7-95fc-4eae-886d-563fa325df31.jpghttps://files.geocollections.info/large/b8/61/b8612416-345b-445a-a972-81908d71ec34.jpghttps://files.geocollections.info/large/18/ff/18ff5b25-baec-4a60-85a1-cd16487cde42.jpg
Taxon description

Kröger & Aubrechtová, 2019

Diagnosis (after Furnish & Glenister 1964). Gradually expanding conchs with a ribbed or smooth shell surface, characterized by a slight to moderate whorl overlap, circular to subquadrate whorl cross section, central position of siphuncle in initial half-volution, marginodorsal in succeeding 1.5–2 whorls, subdorsal at maturity, and thick, layered connecting rings.

Synonyymit
1840     Clymenia antiquissima Eichwald 1840 (nomen nudum) — Eichwald , pp. 115
1842     Clymenia antiquissima — Eichwald , pp. 33 , fig. 3:16, 17
1843     Clymenia antiquissima — Eichwald , fig. 3:16-17
1860     Clymenia antiquissima m. — Eichwald , pp. 1301
1861     Lituites (Trocholites) antiquissimus — Schmidt , pp. 62 , fig. 6:2a-g
1861     Lituites antiquissimus — Roemer , pp. 62 , fig. 6:f-g
1869     Lituites antiquissimus — Karsten , pp. 52 , fig. 19:7a-c
1885     Lituites antiquissimus — Karsten , pp. 68 , fig. 4:12
1925     Discoceras antiquissimum — Foerste , pp. 17,58 , fig. 18:1
1930     Discoceras antiquissimum (Eichwald, 1840) — Teichert , pp. 285
1934     Discoceras antiquissimum — Strand , pp. 32 , fig. 2:4,11; 4:2,3; 13:9
1936     Discoceras antiquissimum — Thorslund , fig. 2:11
1953     Discoceras antiquissimum — Balashov , pp. 265 , fig. 12:1a,b
1958     Discoceras antiquissimum — Sweet , pp. 99 , fig. text fig. 13q
1958     Discoceras antiquissimum — Sweet , pp. 99 , fig. text fig. 13q
1967     Discoceras antiquissima — Hucke & Voigt , pp. 58 , fig. 15:1
1973     Discoceras antiquissimum — Neben & Krueger , fig. 77:24,25
1984     Discoceras antiquissimum — Dzik , pp. 42 , fig. text fig. 9c-d; 12.39; 7:1
2013     Discoceras antiquissimum (Eichwald, 1842) — Kröger , pp. 72 , fig. 31B
2017     Cylmenia antiquissima Eichwald, 1842 — Kröger & Aubrechtová , pp. 10
Aiheeseen liittyvät julkaisut
Kröger, B., Aubrechtová, M. 2018. Cephalopods from reef limestone of the Vasalemma Formation, northern Estonia (latest Sandbian, Upper Ordovician) and the establishment of a local warm-water fauna.Journal of Systematic Palaeontology 16 , 10,799-839. DOI:10.1080/14772019.2017.1347212
Stumbur, H. 1955. Eesti NSV ülem-ordoviitsiumi nautiloiididest [Diplomitöö].
Balashov, Z. G. 1953. Svernutye i polusvernutye nautiloidei ordovika Pribaltiki.Trudy Vsesoûznogo Naučno-Issledovatel'skogo Geologo-Razvedočnogo Instituta (VNIGRI) , 217-300. Stratigraphy and fauna of the Ordovician and Silurian West Russian Platform , pp. 217-300.
Teichert, C. 1930. Die Cephalopoden-Fauna der Lyckholm-Stufe des Ostbaltikums.Paläontologische Zeitschrift 12 , 3/4,264-312. DOI:10.1007/BF03044452
Eichwald, E. 1860. Lethaea Rossica ou Paléontologie de la Russie. Premier volume. Ancienne Période en deux sections. DOI:10.5962/bhl.title.52391
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