perekond

Discoceras Barrande, 1867

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.

Valik taksonit käsitlevast teaduskirjandusest

Kröger, B., Aubrechtová, M. 2019. The cephalopods of the Kullsberg Limestone Formation, Upper Ordovician, central Sweden and the effects of reef diversification on cephalopod diversity. Journal of Systematic Palaeontology 17, 12, 961-995. DOI:10.1080/14772019.2018.1491899

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

Kröger, B. 2013. The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden. European Journal of Taxonomy 41, 41, 1-110. DOI:10.5852/ejt.2013.41

Kröger, B., Ebbestad, J. O. R., Högström, A. E. S., Frisk, Ǻ. M. 2011. Mass concentration of Hirnantian cephalopods from the Siljan District, Sweden; taxonomy, palaeoecology and palaeobiogeographic relationships. Fossil Record 14, 1, 35-53. DOI:10.1002/mmng.201000014

Sweet, W. C. 1988. The Conodonta: morphology, taxonomy, paleoecology, and evolutionary history of a long-extinct animal phylum. Oxford Monographs on Geology and Geophysics 10, 1-212.

Sweet, W. C. 1958. The Middle Ordovician of the Oslo Region, Norway: 10. Nautiloid Cephalopods. Norsk Geologisk Tidsskrift 38, 1, 1-178.

Stumbur, H. A. 1956. On the nautiloids of Kohila Subseries (Upper Ordovician of East Baltic). Tartu Riikliku Ülikooli Toimetised 42, 176-185.

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. 1861. Paleontologiâ Rossii. Drevnij period. II. Fauna grauvakkovoj, gornoizvestkovoj i medistoslancevatoj formacij Rossii. pp. 1-521. R. Golike (former Ya. Ionsona).

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

Eichwald, E. von 1840. Geognostičeskie zamečaniâ o Litve, Volyni i Podolii. Gorny Zhurnal 3, 7, 1-59.

Leitud liigid

1. Discoceras amtjaernense Kröger et Aubrechtová, 2019 | Sandby lade

2. Discoceras angulatum (Saemann, 1854) | Pirgu lade

3. Discoceras antiquissimum (Eichwald, 1842) | Nabala lade→Pirgu lade

4. Discoceras arctuatum (Lossen, 1860) | Darriwili lade

5. Discoceras bandonis Remelé, 1880 | Idavere alamlade

6. Discoceras boreale Sweet, 1958 | Darriwili lade→Sandby lade

7. Discoceras costatum Rasmussen et Surlyk, 2012

8. Discoceras depressum Sweet, 1958 | Darriwili lade

9. Discoceras fleischeri Sweet, 1958 | Ülem-Ordoviitsium

10. Discoceras gubkovense (Balashov, 1953) | Idavere alamlade

11. Discoceras ievense (Balashov, 1953) | Jõhvi alamlade

12. Discoceras nilssoni Kröger et Aubrechtová, 2019 | Sandby lade→Katy lade

13. Discoceras rarospira (Eichwald, 1840) | Haljala lade→Nabala lade

14. Discoceras roemeri Strand, 1934 | Vormsi lade→Pirgu lade

15. Discoceras siljanense Kröger, Ebbestad, Högström et Frisk, 2011 | Hirnanti lade

16. Discoceras spongistriatum (Balashov, 1953) | Ülem-Ordoviitsium

17. Discoceras vasalemmense (Balashov, 1953) | Jõhvi alamlade→Oandu lade

Klassifikatsioon

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