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Astrocratis acutispina

Asteroidea - Paxillosida - Astropectinidae

Taxonomy
Astrocratis acutispina was named by Blake and Sprinkle (1996). It is not extant. Its type specimen is Texas Memorial Museum, Holotype 1238TX26, Paratype 1238TX37. Its type locality is Asteroidea, Pflugerville Fm, Little Walnut Creek, which is in a Campanian marine marl in the Pflugerville Formation of Texas. It is the type species of Astrocratis. It was considered monophyletic by Blake and Sprinkle (1996).

Entered
by L. Villier on 2006-08-24

Synonymy list
YearName and author
1996Astrocratis acutispina Blake and Sprinkle pp. 1312-1317 figs. 1-3

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
—Ambulacraria
phylumEchinodermata
subphylumEleutherozoa
—Asterozoa()
RankNameAuthor
classAsteroidea
subclassAmbuloasteroidea
infraclassNeoasteroidea()
superorderValvatacea
orderPaxillosida
familyAstropectinidae
genusAstrocratis
speciesacutispina

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.

†Astrocratis acutispina Blake and Sprinkle 1996
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Diagnosis
ReferenceDiagnosis
D. B. Blake and J. Sprinkle 1996Astropecten like member of the Astropectinidae in which the adambulacrals are paired and aligned with the inferomarginals. Large inferomarginal spines few, widely spaced across inferomarginal. Spines slender, attenuated, tips pointed. Large spine bases rounded to slightly dimpled but not dissected (horseshoe-shaped). First adambulacrals comparatively robust.
Measurements
No measurements are available
Composition: high Mg calcitef
Ontogeny: accretion, addition of partsp
Grouping: solitaryf
Environment: marinef
Locomotion: slow-movingf
Life habit: semi-infaunalf
Diet: carnivoref
Vision: limitedc
Reproduction: oviparousf
Dispersal: waterf
Dispersal 2: planktonicf
Created: 2007-10-02 03:56:56
Modified: 2009-10-10 10:31:00
Source: f = family, c = class, p = phylum
References: Aberhan et al. 2004, Blake 1990, Aberhan 1992

Age range: Early/Lower Campanian or 83.60000 to 72.20000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Early/Lower Campanian83.6 - 72.2USA (Texas) Astrocratis acutispina (type locality: 59867)