ACASTA-SPONGITEFORMIS (CIRRIPEDIA, THORACICA) FROM THE SOUTH-WEST INDIAN-OCEANстатья
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Аннотация:Acasta spongiteformis sp.n. from the Indian Ocean is described. The shell of this species has small splits between its compartments, the basis is cup-shaped, with smooth margin and without any internal ribs. The lateral plates have got tiny ribs near their basal margins. Scutum has radial striae. The segments of anterior ramus of the fourth cirrus are armed with curved hooks. A. spongiteformis is similar to A. spongites Poli and A. japonica Pilsbry, but differs from them by the presence of the curved hooks on the segments of anterior ramus of the fourth cirrus and by having the basi-dorsal process as well.