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Ristnacrinus

Crinoidea - Myelodactylida - Iocrinidae

Taxonomy
Ristnacrinus was named by Opik (1934). Its type is Ristnacrinus marinus.

It was assigned to Eustenocrinidae by Donovan (1984), Ausich (1998); to Disparida by Sepkoski (2002); and to Iocrinidae by Donovan (1985), Ausich et al. (2015).

Species
R. marinus (type species), R. oepiki
Species lacking formal opinion data
R. angulatus, R. cirrifer, R. columnals

Synonymy list
YearName and author
1934Ristnacrinus Opik
1984Ristnacrinus Donovan
1985Ristnacrinus Donovan
1998Ristnacrinus Ausich p. 25
2002Ristnacrinus Sepkoski
2015Ristnacrinus Ausich et al.

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
—Ambulacraria
phylumEchinodermata
subphylumBlastozoa
RankNameAuthor
classCrinoideaMiller 1821
subclassPentacrinoideaJaekel 1918
infraclassInadunata(Wachsmuth and Springer 1897)
superorderDisparida(Moore and Laudon 1943)
orderMyelodactylida
familyIocrinidaeMoore and Laudon 1943
genusRistnacrinusOpik 1934

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

G. †Ristnacrinus Opik 1934
show all | hide all
†Ristnacrinus marinus Opik 1934
†Ristnacrinus oepiki Ausich et al. 2015
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: high Mg calcitec
Ontogeny: accretion, addition of partsp
Environment: marinep
Locomotion: stationarysubc
Attached: yessubc
Life habit: intermediate-level epifaunalsubc
Diet: suspension feedersubc
Vision: blindc
Dispersal: waterp
Dispersal 2: planktonicp
Created: 2004-02-28 16:34:13
Modified: 2009-10-09 13:33:22
Source: subc = subclass, c = class, p = phylum
References: Aberhan et al. 2004, Aberhan 1992, Kiessling 2004

Age range: base of the Kukruse to the top of the Rawtheyan or 458.00000 to 445.20000 Ma

Collections (47 total)


Time interval Ma Country or state Original ID and collection number
Sandbian458.2 - 452.8Estonia R. sp. (164222 164248)
Kukruse458.0 - 456.8Estonia (Harju) R. marinus (193517)
Idavere458.0 - 452.8Estonia (Ida-Viru) R. marinus (193514 193521)
Idavere458.0 - 452.8Latvia (Daugavpils) R. angulatus, R. marinus (192983)
Idavere458.0 - 452.8Estonia (Harju) R. marinus (193518 197482 197484)
Keila453.9 - 452.8Latvia (Daugavpils) R. marinus (192985)
Keila453.9 - 452.8Estonia (Kuusiku) R. marinus (38037)
Keila453.9 - 452.8Estonia (Harju) R. marinus (193520 195554 197490) R. marinus, R. oepiki (168223)
Keila453.9 - 452.8Estonia (Ida-Viru) R. marinus (193516)
Keila453.9 - 452.8Estonia R. angulatus, R. marinus (197549) R. marinus (197516 197518 197519)
Onnian - Pusgillian453.0 - 449.2Italy (Sardinia) R. cirrifer (196939 196942)
Johvi452.8 - 449.9Estonia R. marinus (197514 197515)
Johvi452.8 - 449.9Estonia (Ida-Viru) R. angulatus, R. marinus (193515) R. marinus (193522 197475 197476 197479 197480 197481)
Johvi452.8 - 449.9Estonia (Harju) R. angulatus, R. marinus (193519 197488) R. marinus (197483 197485 197486)
Johvi452.8 - 449.9Latvia (Daugavpils) R. marinus (192984)
Katian452.8 - 445.2Portugal (Aveiro) R. cirrifer (182918)
Katian452.8 - 445.2Spain (Zaragoza) R. cirrifer (196922)
Katian - Hirnantian452.8 - 443.1Sweden (Dalarne) R. sp., R. columnals (73413)
Ashgill449.5 - 443.1Spain (Aragon) R. cirrifer (163399)
Cautleyan449.2 - 448.8United Kingdom R. sp. (166622)
Cautleyan449.2 - 448.8United Kingdom (England) R. sp. (166621)
Cautleyan449.2 - 448.8United Kingdom (Wales) R. sp. (166619)
Rawtheyan448.8 - 445.2United Kingdom (England) R. sp. (161737)
Rawtheyan448.8 - 445.2United Kingdom (Wales) R. sp. (166618)
Rawtheyan448.8 - 445.2United Kingdom R. sp. (166620)