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Charltonina
Taxonomy
Charltonina was named by Bermúdez (1952). It was considered monophyletic by Bermúdez (1952).
It was assigned to Alabaminidae by Bermúdez (1952); and to Foraminiferida by Sepkoski (2002).
It was assigned to Alabaminidae by Bermúdez (1952); and to Foraminiferida by Sepkoski (2002).
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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. †Charltonina Bermúdez 1952
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Diagnosis
Reference | Diagnosis | |
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P. J. Bermúdez 1952 | Concha trocoide, biconvexa, lenticular, borde periferico agudo y cortante, camaras numerosas, todas visibles por el lado dorsal, solo visibles por el lado ventral las de la ultima vuelta de espira, suturas arqueadas; ombligo cerrado; pared calcarea, perforada; abertura como una ranura arqueada en el borde interno de la ultima camara, extendiendose desde la region umbilical al margen periferico de la concha. Dimension, 0,35 a 0,40 mm. -Cretacico superior a Paleoceno.
El lado dorsal de este genero es semejante a Siphoina y Pulsiphonina, por el lado ventral difiere porque la abertura es una ranura arqueada que se extiende desde la region umbilicalal margen periferico de la concha, extendiendose algo paralelamente al margen. El genero ha sido nombrado en honor de la Dra. Frances Charlton de Rivero, Profeora de Geologia y Paleontologia en la Universidad Central de Venezuela. |