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Terminasteridae

Asteroidea - Zorocallida - Terminasteridae

Taxonomy
Terminasteridae was named by Gale (2011). Its type is Terminaster.

It was assigned to Forcipulatida by Gale (2011) and Gale (2011); and to Zorocallina by Ewin and Gale (2020) and Gale and Jagt (2021).

Subtaxa
Alkaidia

Synonymy list
YearName and author
2011Terminasteridae Gale p. 84
2020Terminasteridae Ewin and Gale p. 942
2021Terminasteridae Gale and Jagt p. 182

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
—Ambulacraria
phylumEchinodermata
subphylumEleutherozoa
—Asterozoa()
RankNameAuthor
classAsteroidea
subclassAmbuloasteroidea
infraclassNeoasteroidea()
superorderForcipulatacea
orderZorocallida
familyTerminasteridae
familyTerminasteridae

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.

Fm. †Terminasteridae Gale 2011
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G. †Alkaidia Blake and Reid 1998
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†Alkaidia megaungula Ewin and Gale 2020
†Alkaidia sumralli Blake and Reid 1998
Diagnosis
ReferenceDiagnosis
A. S. Gale 2011Forcipulatid asteroids in which teh arm is made up of only seven ossicle rows (one radial, two adradial, two superomarginal and two inferomarginal) all of which alternate. Superomarginal and abactinal ossicles of the arm all possess six articulation surfaces, the inferomarginals five. Surface sculpture of marginals and abactinals consists of dense rugosities conjoined by struts of stereom.
T.A.M. Ewin and A.S. Gale 2020Zorocallinids with extra-axial arm constructed of seven rows of ossicles organized with one row of radials, two rows of adradials, two rows of superomarginals, and two rows of infromarginals; both marginal rows extend to arm tip.
Measurements
No measurements are available
Composition: high Mg calcitec
Ontogeny: accretion, addition of partsp
Environment: marinep
Locomotion: slow-movingc
Life habit: low-level epifaunalc
Diet: carnivorec
Vision: limitedc
Dispersal: waterp
Dispersal 2: planktonicp
Created: 2004-02-28 15:35:10
Modified: 2010-02-09 06:02:08
Source: c = class, p = phylum
References: Aberhan et al. 2004, Aberhan 1992

Age range: base of the Late/Upper Albian to the top of the Early/Lower Cenomanian or 105.30000 to 93.50000 Ma

Collections (7 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Albian105.3 - 99.6USA (Texas) Alkaidia sumralli (59875 59876 59878 59880)
Early/Lower Cenomanian99.6 - 93.5USA (Texas) Alkaidia sumralli (59881 59882 59883)