SPIROPLECTINELLA Kisel'man, 1972

 

 

Type species: Spiroplecta wrightii Silvestri, 1903 (*2930), p. 63; OD.Spiroplectinella Kisel'man, 1972 (*1695), p. 135. Spirorutilis Hofker, 1976 (*1525), p. 69: type species:Textularia carinata d'Orbigny, 1846 (*2309), p. 247;

OD.

Test free, with early planispiral coil at least in the microspheric stage, followed by biserial adult stage that commonly increases rap-idly in breadth, is lozenge shaped in section and may have a marginal keel; wall aggluti­nated, noncanaliculate, interior fine grained with inner organic lining, outer part of wall more coarsely agglutinated; aperture a low arch at the base of the apertural face. Paleocene to Holocene; cosmopolitan.

 

Remarks: Banner and Pereira (1981, *130, p1. 7, figs. 1-5) reported S. wrightii (as Spirorutilis) to be noncanaliculate.