liik

Discoceras antiquissimum (Eichwald, 1842)

Taksoni kirjeldused

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.

Sünonüümika

1840 Clymenia antiquissima Eichwald 1840 (nomen nudum) — Eichwald , lk. 115

1842 Clymenia antiquissima — Eichwald , lk. 33, joon. 3:16, 17

1843 Clymenia antiquissima — Eichwald , joon. 3:16-17

1860 Clymenia antiquissima m. — Eichwald , lk. 1301

1861 Lituites (Trocholites) antiquissimus — Schmidt , lk. 62, joon. 6:2a-g

1861 Lituites antiquissimus — Roemer , lk. 62, joon. 6:f-g

1869 Lituites antiquissimus — Karsten , lk. 52, joon. 19:7a-c

1885 Lituites antiquissimus — Karsten , lk. 68, joon. 4:12

1925 Discoceras antiquissimum — Foerste , lk. 17,58, joon. 18:1

1930 Discoceras antiquissimum (Eichwald, 1840) — Teichert , lk. 285

Valik taksonit käsitlevast teaduskirjandusest

Kröger, B. 2025. The Lyckholm acme of cephalopods – Review of the late Katian (Vormsi–Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978, 1-169. DOI:10.5852/ejt.2025.978.2801

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. Juhendaja: A. Rõõmusoks]. 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

Klassifikatsioon

organismirühm	Biota
riik	Animalia
hõimkond	Mollusca
klass	Cephalopoda
alamklass	Tarphyceratia
selts	Tarphyceratida
sugukond	Discoceratidae
perekond	Discoceras
liik	amtjaernense
	angulatum
	antiquissimum
	arctuatum
	bandonis
	boreale
	costatum
	depressum
	fleischeri
	gubkovense
	ievense
	nilssoni
	paopense
	rarospira
	roemeri
	saemanni
	siljanense
	spongistriatum
	vasalemmense