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Spiroplectoides
Taxonomy
Spiroplectoides was named by Cushman (1927). It was considered monophyletic by Cushman (1927).
It was assigned to Spiroplectininae by Cushman (1927); and to Spiroplectamminidae by Cushman (1927).
It was assigned to Spiroplectininae by Cushman (1927); and to Spiroplectamminidae by Cushman (1927).
Synonymy list
| Year | Name and author |
|---|---|
| 1927 | Spiroplectoides Cushman p. 77 fig. 78 |
| 1927 | Spiroplectoides Cushman |
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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. †Spiroplectoides Cushman 1927
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. A. Cushman 1927 | Test with the early chambers planospiral, later ones biserial,
the test elongate, sides nearly parallel and the biserial chambers very numerous; wall calcareous, finely perforate; aperture elliptical, terminal or nearly so in the adult. America. I have lately had specimens from the Upper Cretaceous of Texas and Mexico which are evidently identical with Ehrenberg's species. The genus Heterohelix afterward changed to Spiroplectc: by Ehrenberg has as its type H. Ehrenberg with planospiral young but the later chambers as in Guembelina, a genus derived from it. |