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Helicocystitidae

Helicocystitidae

Taxonomy

Subtaxa

Synonymy list
YearName and author
2013Helicocystitidae Smith and Zamora pp. 5 - 6

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
RankNameAuthor
Ambulacraria
phylumEchinodermata
familyHelicocystitidae
familyHelicocystitidae

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. †Helicocystitidae Smith and Zamora 2013
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G. †Helicocystis Smith and Zamora 2013
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Helicocystis moroccoensis Smith and Zamora 2013
Diagnosis
ReferenceDiagnosis
A. B. Smith and S. Zamora 2013Stem polyplated; basal cup of large sutured plates; theca above the cup with five recumbent ambulacra spiralling clockwise away from an apical peristome. Ambulacra composed of biserial flooring plates lacking direct connection with the body chamber, and sheets of primary cover plates and very small secondary cover plates. Interambulacral zones are also spiral, composed of sheets of plates that could be expanded and contracted concertina-like.
Measurements
No measurements are available
Composition: high Mg calcitep
Ontogeny: accretion, addition of partsp
Environment: marinep
Dispersal: waterp
Dispersal 2: planktonicp
Created: 2005-02-03 07:43:57
Modified: 2022-12-08 21:49:31
Source: p = phylum
Reference: Aberhan 1992

Age range: Lenian or 516.00000 to 513.00000 Ma

Collections (3 total)


Time interval Ma Country or state Original ID and collection number
Lenian516.0 - 513.0Morocco Helicocystis moroccoensis (161459 161460 161461)