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Amygdalocystites
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).
It was assigned to Amygdalocystitidae by Parsley (1981); and to Comarocystitida by Sepkoski (2002).
Species lacking formal opinion data
Synonyms
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Synonymy list
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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. †Amygdalocystites Billings 1854
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†Amygdalocystites florealis Billings 1854
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Invalid names: Amygdalocystites laevis Billings 1883 [synonym]
†Amygdalocystites radiatus Billings 1854
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Invalid names: Amygdalocystites invaginata Bassler 1950 [synonym]
Invalid names: Billingsocystis Bassler 1950 [synonym]
Diagnosis
Reference | Diagnosis | |
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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. |