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Amygdalocystites

Paracrinoidea - Comarocystitida - Amygdalocystitidae

Taxonomy
Amygdalocystites was named by Billings (1854) [Sepkoski's age data: O Cara-m Sepkoski's reference number: 706]. It is not extant.

It was assigned to Amygdalocystitidae by Parsley (1981); and to Comarocystitida by Sepkoski (2002).

Synonyms
Synonymy list
YearName and author
1854Amygdalocystites Billings
1950Billingsocystis Bassler p. 271
1981Amygdalocystites Parsley p. 2
2002Amygdalocystites Sepkoski, Jr.
2002Billingsocystis Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
RankNameAuthor
subphylumParacrinozoaParsley and Mintz 1975
classParacrinoideaRegnell 1945
orderComarocystitidaParsley and Mintz 1975
familyAmygdalocystitidaeJaekel 1900
genusAmygdalocystitesBillings 1854

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
ReferenceDiagnosis
R. S. Bassler 1950 (Billingsocystis)Theca ovoid-oblong slightly flattened, with food-groove system imperfectly known but apparently confined to a single short, transverse, relatively deep, semilunate groove. No branches of this groove and no facets for the attachment of arms are present. Thecal plates many, all strongly ridged in a direction radiate to the angles. Columns cylindrical consisting of very thin columnals attached to the invaginated base.