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Placoblastus obovatus

Blastoidea - Nucleocrinida - Nucleocrinidae

Taxonomy
Elaeacrinus obovatus was named by Barris (1883).

It was recombined as Nucleocrinus obovatus by Barris (1920), Thomas (1924); it was recombined as Placoblastus obovatus by Fay (1961).

Sister species lacking formal opinion data

Synonymy list
YearName and author
1883Elaeacrinus obovatus Barris p. 358 fig. 3
1920Nucleocrinus obovatus Barris p. 423 figs. Pl. 36, figs. 1, 9, 16, 17 (not figs. 6-8)
1924Nucleocrinus obovatus Thomas pp. 423 - 428 figs. pl. 36, figs. 1, 6-9, 16-17, text-fig. 65
1961Placoblastus obovatus Fay pp. 92 - 94 figs. Plate 31, figures 1-9; text-figs. 193-196

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumBlastozoa
RankNameAuthor
classBlastoideaSay 1825
superorderSpiraculata(Jaekel 1918)
orderNucleocrinida
familyNucleocrinidaeBather 1899
genusPlacoblastusFay 1961
speciesobovatus(Barris 1883)

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.

Placoblastus obovatus Barris 1883
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: high Mg calcitep
Ontogeny: accretion, addition of partsp
Environment: marinep
Locomotion: stationaryc
Attached: yesc
Life habit: intermediate-level epifaunalc
Diet: suspension feederc
Vision: blindc
Dispersal: waterp
Dispersal 2: planktonicp
Created: 2004-02-28 15:52:18
Modified: 2010-02-09 11:56:54
Source: c = class, p = phylum
References: Aberhan 1992, Aberhan et al. 2004

Age range: Givetian or 387.95000 to 382.31000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Givetian387.95 - 382.31USA (Michigan) Placoblastus obovatus (39830)