Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections

Hemiaster (Trachyaster)

Echinoidea - Spatangoida - Hemiasteridae

Synonyms
Synonymy list
YearName and author
1869Trachyaster Pomel p. 473
1883Trachyaster Pomel
1949Hemiaster (Trachyaster) minutus Sanchez Roig
1966Hemiaster (Trachyaster) Fischer p. U559
1984Hemiaster (Trachyaster) Kier p. 18

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumEchinozoa
classEchinoidea()
subclassEuechinoideaBronn 1860
RankNameAuthor
superorderAcroechinoidea()
Carinacea
Irregularia()
Atelostomata
orderSpatangoida
familyHemiasteridae
genusHemiaster
subgenusTrachyaster()

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.

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: Kiessling 2004, Aberhan 1992

Age range: Burdigalian or 20.44000 to 15.97000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Burdigalian20.44 - 15.97Egypt Trachyaster cotteaui (47996)