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.
Synonymy list
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
Selection of related publications
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
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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Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Tarphyceratia |
| Order | Tarphyceratida |
| Family | Discoceratidae |
| Genus | Discoceras |
| Species | amtjaernense |
| angulatum | |
| antiquissimum | |
| arctuatum | |
| bandonis | |
| boreale | |
| costatum | |
| depressum | |
| fleischeri | |
| gubkovense | |
| ievense | |
| nilssoni | |
| rarospira | |
| roemeri | |
| siljanense | |
| spongistriatum | |
| vasalemmense |
See also
References based on distribution
- Teichert, 1930c Saare Manor (Lyckholm) old quarry
- Balashov, 1953a Piirsalu old quarry Pirgu Stage
- Balashov, 1953a Vormsi Island Pirgu Stage
- Balashov, 1953a Rannaküla old quarry Pirgu Stage
- Kröger & Aubrechtová, 2018 Kärdla Nabala Stage
- Eichwald, 1860a Kärdla