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Plaxocrinus

Crinoidea - Dendrocrinida - Pirasocrinidae

Taxonomy
Plaxocrinus was named by Moore and Plummer (1937) [Sepkoski's age data: C Bash P Wc]. It is not extant. Its type is Plaxocrinus crassidiscus.

It was assigned to Pirasocrinidae by Pabian and Rushlau (2002); and to Cladida by Sepkoski (2002).

Species
P. crassidiscus (type species), P. piutae
Species lacking formal opinion data
P. brasilensis, P. gloukosensis, P. laxus, P. oeconomicus

Synonymy list
YearName and author
1937Plaxocrinus Moore and Plummer
2002Plaxocrinus Pabian and Rushlau
2002Plaxocrinus Sepkoski

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
—Ambulacraria
phylumEchinodermata
subphylumBlastozoa
classCrinoideaMiller 1821
subclassPentacrinoideaJaekel 1918
RankNameAuthor
infraclassInadunata(Wachsmuth and Springer 1897)
—Cladida(Moore and Laudon 1943)
—Eucladida
superorderCyathoformes
orderDendrocrinida
superfamilyPirasocrinoidea(Moore and Laudon 1943)
familyPirasocrinidaeMoore and Laudon 1943
genusPlaxocrinusMoore and Plummer 1937

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. †Plaxocrinus Moore and Plummer 1937
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†Plaxocrinus crassidiscus Miller and Gurley 1894
†Plaxocrinus piutae Lane and Webster 1966
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: 2009-10-09 11:50:31
Modified: 2009-10-09 13:50:31
Source: subc = subclass, c = class, p = phylum
References: Kiessling 2004, Aberhan 1992, Hendy et al. 2009

Age range: base of the Moscovian to the top of the Rusavkinian or 315.20000 to 287.60000 Ma

Collections (8 total)


Time interval Ma Country or state Original ID and collection number
Moscovian315.2 - 307.0Brazil (Pará) P. brasilensis (90771)
Missourian306.0 - 303.7USA (Texas) P. laxus, P. oeconomicus (90808)
Virgilian303.7 - 298.9USA (Kansas) P. gloukosensis (90809)
Rusavkinian303.7 - 287.6USA (Nebraska) P. crassidiscus (124407 124441)
Artinskian290.1 - 283.3USA (Nevada) P. piutae (90756) P. sp. (90757) P. sp., P. piutae (74742)