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Rotaliatina
Taxonomy
Rotaliatina was named by Cushman (1925) [Sepkoski's age data: T Eo-u T Ol-l Sepkoski's reference number: 728]. It was considered unknown by Cushman (1925).
It was assigned to Gyroidinoidinae by Cushman (1925); to Discorbisinae by Cushman (1927); and to Foraminiferida by Sepkoski (2002).
It was assigned to Gyroidinoidinae by Cushman (1925); to Discorbisinae by Cushman (1927); and to Foraminiferida by Sepkoski (2002).
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. †Rotaliatina Cushman 1925
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. A. Cushman 1925 | Test free, trochoid, spiral, composed of about three volutions, the last one composed of numerous chambers, all the chambers exposed from the dorsal side, only those of the last-formed coil visible from the ventral side, umbilicate ventrally; chambers distinct; sutures distinct and usually slightly depressed; wall in the known species smooth; aperture an arched slit between the
base of the apertural face and the previous coil. (Type of genus Rotaliatina mexicana Cushman, n. sp.) |