NEW SPECIES OF THE GENUS ACASTA (CIRRIPEDIA, THORACICA) FROM WESTERN PACIFICстатья
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Аннотация:Four new species of the genus Acasta are described from different regions of the Pacific Ocean. A. abnormis sp. n. was found in the waters of the Philippines Sea at a depth of 300 m, in the sponge Petrosia sp. It is related with A. dofleini, A. aculeata, etc although differs from them by the smooth inner surface of the lateral plates. A. koltuni sp. n. was found in the waters of the Tasmanian Sea at a depth of 110 m, in the sponge Coelosphaera sp. It is related to A. sulcata but differs from it by a very deep basis and a wide spur in the tergum. A. rimiforms sp. n. was found near New Guinea at a depth of 12 m in a sponge of the Axinellidae family, is similar to A. sulcata but differs from it by a flat basis and long slits between it and the lateral plates. A. zevinae sp. n. was found near New Guinea at a depth of 18 m in the sponge Habiclona sp., is similar to the species with a grid-like or longitudinally crossed tergum (A. pectinipes, A. sculpturata, etc.) but differs from them by the peculiar shape of the operculary plates.