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Hysteraster

Echinoidea - Spatangoida - Brissidae

Taxonomy
Hysteraster was named by McNamara (1992) [Sepkoski's age data: T Mi-l-u Sepkoski's reference number: 1242]. Its type is Hysteraster paragrapsimus.

It was assigned to Brissidae by McNamara (1992); and to Spatangoida by Sepkoski (2002).

Species
H. paragrapsimus (type species)

Synonymy list
YearName and author
1992Hysteraster McNamara
2002Hysteraster Sepkoski

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
—Ambulacraria
phylumEchinodermata
subphylumEleutherozoa
—Echinozoa()
classEchinoidea()
RankNameAuthor
subclassEuechinoideaBronn 1860
superorderAcroechinoidea()
—Carinacea
—Irregularia()
—Atelostomata
orderSpatangoida
suborderBrissidina
familyBrissidae
genusHysteraster

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. †Hysteraster McNamara 1992
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†Hysteraster paragrapsimus McNamara 1992
Diagnosis
ReferenceDiagnosis
K. J. McNamara 1992Test moderately large, relatively narrow and with
slight anterior notch. Apical system set well anterior ofcentre; deeplydepressedinfemales.Petalsshort, broad and deeply depressed in females, only slightly depressed in males; do not extend to peripetalous fasciole; pore pairs very reduced in size in anterior rows of anterior petals; in all petals pore pairs absent in vicinity of apical system. Apical system ethmolytic with fourgonopores. Peripetalous andsubanal fascioles present. Aboral tubercles much larger within peripetalous fasciole than outside of it; those in interambulacra 2b and 3a are the largest and most sparsely distributed. Peristome subcentral. Plastron small, with prominent posterior keel. Periplastronal area wide.
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 Early/Lower Miocene to the top of the Middle Miocene or 23.03000 to 11.60800 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Early/Lower Miocene - Middle Miocene23.03 - 11.608Australia (South Australia) H. paragrapsimus (183266)