Species

Discoceras antiquissimum (Eichwald, 1842)

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
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]. pp. 1-159.
Balashov, Z. G. 1953. Svernutye i polusvernutye nautiloidei ordovika Pribaltiki. Trudy Vsesoûznogo Naučno-Issledovatel'skogo Geologo-Razvedočnogo Instituta (VNIGRI) 217-300. Gostoptehizdat.
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. pp. XIX+1–1657. E. Schweizerbart. DOI:10.5962/bhl.title.52391
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