An other difference between striatula and gallina is the sculpture, made of sharp concentric lamellae. But this feature does not seem to be completely decisive. Above, some samples of Venus striatula in Forbes & Hanley: British mollusca vol. 4, London 1853, via BHL. One notices, on figure 4-left, a shells that looks quite like a gallina, with the pattern of a striatula.

Veneridae: hooks prosogyrous, anteriorly placed; lunula well developed. Chamelea: sculpture of commarginal lamellae or folds; left valve with two divergent cardinals and a sall lamellar lateral. Above: left valve of a young specimen collected at ≈ 2m deep inside the sediment, bottom at 13m deep, Prokljan marine lake, Šibenik-Knin Comitat, W. Croatia. 12,85mm.