LUGDUNUM Saidova. 1975

 

 

Type species: Bolivina hantkeniana Brady. 1881 (*339), p. 58: OD.

Lngdunum Saidova.1975(*2695). p.308,Test ovate to subtriangular in outline. lenticular in section, periphery carinate. cham­bers moderately inflated, biserially arranged. increasing in proportionate breadth as added, sutures straight to oblique, depressed: wall calcareous. finely perforate. thin. hyaline. optically radial, surface smooth to longitud­inally costate, with short, fine ribs. peripheral keel may be entire or may be interrupted at each suture and have a serrate margin: aperture basal to areal, large and oval. with a thick bordering lip and an internal folded or U-shaped toothplate, attached part broad and triangular, free part narrow, one angle show­ing through the aperture as a short tooth. Holocene; Pacific: Atlantic.