Microgloma nhanduti Benaim & Absalão 2011

Shell minute, ovate, H/L ratio about 0.78 (n 29, min 0.74, max 0.81), Width of both valves/H ratio about 0.7 (n 11, min 0.67, max 0.77), inequilateral, translucent, glossy; umbones moderately prominent, large, posterior to midline, orthogyrous. Antero–dorsal margin convex and oblique; anterior margin rounded and projected. Antero–ventral margin convex, postero–ventral margin shorter and rising up to short and rounded posterior end; postero–dorsal margin convex, but forming a small shoulder. Entire shell margin slightly thickened. Surface with subtle commarginal growth lines. Hinge plate with 5–7 anterior and 4–5 posterior teeth, interrupted by a shallow rectangular hinge plate. Width of both anterior and posterior row of teeth occupies about 70% of width of hinge plate, which is thick for its size (whp/H approximately 0.14). Posterior part of the hinge plate shorter than anterior one. Prodissoconch surface nacreous, with several radial striae, resembling a spider’s web. Prodissoconch length approximately 246 µm.Maximum adult shell length 1.16 mm. Measurements of the type material. * Width = width of a single valve. Microgloma nhanduti sp. n. Length Height Width* MNRJ 19.113 1.12 0.90 0.29 IBUFRJ 14.991 1.11 0.84 0.24 IBUFRJ 14.991 1.04 0.82 0.29 IBUFRJ 14.991 1.09 0.89 0.29 IBUFRJ 19.176 1.13 0.89 0.29 MZSP 99.980 1.09 0.82 0.29 MZSP 99.980 1.09 0.82 0.27 MZSP 99.980 0.98 0.76 0.24 MZSP 99.980 1.09 0.82 0.27 MZSP 99.980 1.11 0.82 0.27 MZSP 99.980 1.11 0.84 0.22 USNM 1156944 1.11 0.87 0.27 USNM 1156944 1.11 0.87 0.29 USNM 1156944 0.96 0.78 0.27 USNM 1156944 1.07 0.80 0.24 USNM 1156944 1.11 0.89 0.27 MNHN 24596 1.07 0.87 0.22 MNHN 24596 1.07 0.87 0.22 MNHN 24596 1.09 0.80 0.22