Redescription of Asterocheres simulans (Copepoda, Siphonostomatoida, Asterocheridae) - A symbiont of Suberites domuncula ficus (Spongia) from the White Sea. Comments of the taxonomy and ecologyстатья
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Аннотация:The cyclopiform copepod Asterocheres simulans (Th. Scott, 1898) (Siphonostomatoida, Asterocheridae) described from the North Sea was found associated with the sponge Suberites domuncula ficus (Johnston, 1842) (Demospongiae, Tetractinomorpha, Hadromerida, Suberitidae) in Kandalaksha Bay in the White Sea. The Species differs from its congeners in the dorso-ventral flattening of the prosome and the marked swelling of the urosomal segments; the caudal ramus is broader then long, ratio 3 : 4. The antennule of the female consists of 21 segments, that of the male, 18 segments. The ninth antennulary segment carries 6 setae. Maxillae with a tubular extension near the base of xyncoxa, the extension connects with a canal of body. Sexual dimorphism was recognized in the antennule and all thoracic appendages. A collection from a single sponge (dimensions 5 by 8 cm) resulted in 3004 copepodids of all stages. Laboratory observations, taxonomical and ecologycal comments were made on these copepods.