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Hemiaster (Bolbaster) subidus

Echinoidea - Spatangoida - Hemiasteridae

Taxonomy
Hemiaster (Bolbaster) subidus was named by McNamara (1987). Its type specimen is SAN P26554, a test, and it is not a trace fossil. Its type locality is Tortachilla Limestone - St Vincent Basin, which is in an Eocene/Eocene marine horizon in the Tortachilla Limestone Formation of Australia.

Synonymy list
YearName and author
1987Hemiaster (Bolbaster) subidus McNamara pp. 336-337 figs. pl. 44; pl. 48, fig. 8

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumEleutherozoa
Echinozoa()
classEchinoidea()
subclassEuechinoideaBronn 1860
RankNameAuthor
superorderAcroechinoidea()
Carinacea
Irregularia()
Atelostomata
orderSpatangoida
familyHemiasteridae
genusHemiaster
subgenusBolbaster()
speciessubidus

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.

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Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: high Mg calciteo
Ontogeny: accretion, addition of partsp
Environment: marineo
Locomotion: slow-movingo
Life habit: shallow infaunalo
Diet: deposit feedero
Diet 2: detritivoreo
Vision: limitedc
Dispersal: watero
Dispersal 2: planktonico
Created: 2004-02-28 12:18:10
Modified: 2009-10-08 16:32:56
Source: o = order, c = class, p = phylum
References: Aberhan 1992, Kiessling 2004

Age range: base of the Middle Eocene to the top of the Chattian or 47.80000 to 23.03000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Middle Eocene - Late/Upper Eocene47.8 - 33.9Australia (South Australia) Hemiaster subidus (type locality: 48443)
Early/Lower Oligocene33.9 - 28.4Australia (South Australia) Hemiaster subidus (90084 90085)
Chattian28.1 - 23.03Australia (South Australia) Hemiaster subidus (50070)