New species, misidentifications and problematic taxonomy of some Atlantic South American marine mollusks: a review Simone, Luiz Ricardo L. Papéis Avulsos de Zoologia 2024 2024-08-09 64 1 104 7NFMC Ferussac 1822 [1111,1250,218,243] Bivalvia Animalia Carditida 83 84 Mollusca superFamily Carditoidea     Warrana culmenSimone, Medeiros & Molozzi, new species( Fig. 56A-G) https://zoobank.org/ B3A7914F-EFA4-4E19-B1DA-7C25C8FFA67F  Types: Holotype166644. Paratype: MZSP 163737, 3 spm, from type locality.     Typelocality: BRAZIL.  Paraíba; Cabedelo,off, 07°02′41″S 34°47′42″W, ~  14 m[C. R. Medeiroscol., 2022].   Diagnosis:NE Brazilian species with umbonal angle of ~70°; height ~1.2× longer than wide. Umbonal transverse fold narrow.Hinge occupying ~21% of shell height. Crenulation in shell edges minute and numerous.   Description:Shell relatively thick; walls slightly translucent; outline oval, ~1.2× taller than long. Color white. Umbo central, blunt, with both sides straight, relatively symmetrical (anterior edge slightly shorter), with angle ~70°; ventral edge widely rounded ( Fig. 56A-D, F). Prodissoconch smooth, bulging, occupying ~5% of shell height, ~14% of shell width, of 207 µm; flanked by narrow transverse umbonal fold ( Fig. 56F, G). Sculpture uniform, concentric cords from transverse umbonal fold up to shell edge, interspaces deep, equivalent to half each cord width. Hinge thick, occupying ~21% of shell height, bearing only cardinal tooth, and wide anterior resilifer. Resilifer as simple, transverse groove, twice longer than wide, ligament circular in section, locater only in its dorsal, sub-umbonal region ( Fig. 56F, G). Hinge teeth in posterior hinge half. Left valve with large anterior cardinal tooth, rather triangular, 3-times taller than long slightly bifid ventrally; posteriorly flanked by similar-sized socket ( Fig. 56C, F, G). Right valve with tooth-socked counterpart ( Fig. 56D). Inner surface glossy, with muscular scars of difficult visualization ( Fig. 56C, D, F); scar of anterior and posterior adductor muscles relatively small, round- ed, located in both sides of umbonal slopes; pallial line simple. Shell inner edge possessing minute crenulations in its entire ventral border ( Fig. 56F).   Etymology:The specific epithet has the origin the Latin word  culmen,meaning summit; an allusion to angulation of the shell apex (umbo), a species′ characteristics.   Distribution:From Maranhãoto Alagoas, Brazil. [794,1133,570,595] Brazil Paraiba 83 84 1 Paraiba holotype R Medeiros Brazil 14 -7.044722 21 -34.795 83 84 1 Paraiba holotype