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Holocrinus smithi

Crinoidea - Holocrinida - Holocrinidae

Taxonomy
Isocrinus smithi was named by Clark and Twitchell (1915) [attributed to Clark only.]. Its type specimen is USNM 31184, a set of stem ossicles, and it is a 3D body fossil. Its type locality is Paris Canyon, Bear Lake County, which is in a Smithian marine horizon in the Thaynes Formation of Idaho.

It was recombined as Holocrinus smithi by Schubert et al. (1992).

Sister species lacking formal opinion data
H. acutangulus, H. acutangulus, H. dubius, H. meyeri, H. quinqueradiatus, H. trechmanni

Synonymy list
YearName and author
1915Isocrinus smithi Clark and Twitchell p. 21
1992Holocrinus smithi Schubert et al. p. 105 fig. 4,5,7,8

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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
subclassArticulata(Miller 1821)
orderHolocrinida(Jaekel 1918)
familyHolocrinidaeJaekel 1918
genusHolocrinusWachsmuth and Springer 1886
speciessmithi()

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.

†Holocrinus smithi Clark and Twitchell 1915
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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: Hendy et al. 2009, Kiessling 2004, Aberhan 1992

Age range: base of the Smithian to the top of the Spathian or 249.90000 to 246.70000 Ma

Collections (9 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Triassic251.902 - 246.7USA (Idaho) Pentacrinus smithi (33317)
Smithian249.9 - 248.1USA (Idaho) Isocrinus smithi (136684)
Spathian248.1 - 246.7USA (Utah) Holocrinus smithi (122198 122199 122201 122204 122205 122208 122209)