Pisidium subtruncatum Malm, 1855

Rassam, Hanane, Ghamizi, Mohamed, Benaissa, Hassan, Clewing, Catharina & Albrecht, Christian, 2021, The fingernail clams (Bivalvia: Veneroida: Sphaeriidae) of Morocco: Diversity, distribution and conservation status, Biodiversity Data Journal 9, pp. 73346-73346 : 73346

Pisidium subtruncatum Malm, 1855

Ecological interactions

Native status

Autochtonous

Distribution

Holarctic. Found in Europe, North Africa, Siberia to Baikal Lake and North America ( Ellis 1978).

Notes

Shell dimensions: Mean length = 2.92 ± 1.23 mm; Mean height = 2.45 ± 1.08 mm; Mean width = 1.74 ± 1.37 mm.

Key features: Subtriangular shape with a striated shell, opisthogyrous umbo (Fig. 7 ). Posterior end truncated and anterior part elongated. The hinge plate is relatively thick and arched. The left valve has 2 long parallel cardinal teeth (C2, C4). C3 is relatively straight and slightly curved, while lateral teeth are well-developed.

Figures

Figure 7. Pisidium subtruncatum from Fendel spring a External view of the whole animal (left and right); b Dorsal view; c internal view of hinge plate of left and right valves.