Ревизия рода Colga Bergh (Opisthobranchia, Polyceridae), с описанием нового вида из северной части Тихого Океанастатья
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Аннотация:Three species are recognised in the
genus Colga Bergh, 1880: C. villosa(Odhner, 1907),
C. minichevi sp. nov. and C. pacifica Bergh, 1894,
based mainly on material from different Russian and
Soviet expeditions. For all species of Colga full descriptions are given. The name Colga is valid because it is not a homonym of Kolga Danielssen et Koren, 1879
(Echinodermata, Holothuroidea). Issena Iredale et
O’Donoghue, 1923 is a synonym of Colga. Doris lacera Rathke et Vahl in Müller, Abildgaard, Vahl, Holten et Rathke, 1806 is a junior primary homonym of
Doris laceraCuvier, 1804 and therefore should be
replaced byIssa villosa Odhner, 1907 (= Issena abildgaardi Pruvot-Fol, 1934). Colga villosais found from Cape Cod in North West Atlantic to the Barents Sea.
It has 3-6 longitudinal rows of dorsal papillae, serrated
edges of rhinophoral pockets, papillated external rim
of foot, massive second lateral tooth of radula, well
developed central plate-like tooth, ejaculatory duct
armed by colourless spines and unarmed penial atrium.
Colga pacificaranges from Alaska to Shikotan Island
(southern Kurile Islands) and is very similar to C.
villosa, clearly differing by an unarmed ejaculatory
duct but armed penial atrium with colourless spines.
Colga minichevisp. nov. is found along all the Kurile
Islands and also from off South Sakhalin (Okhotsk Sea
side), St. Iona Island and northern Japan Sea. It has
6-8 longitudinal rows of dorsal papillae, smooth edge
of rhinophoral pocket, smooth external rim of foot,
elongated second lateral tooth of radula, lacking or
greatly reduced central tooth and armed ejaculatory
duct with strong brown spines. Issa ramosa Verriill et
Emerton, 1881 is included into the genus Kaloplocamus Bergh, 1879
because of external morphology (ramose lateral processes)
and radula (two elongated central teeth with granulated surface and
three hook-shaped inner laterals). The type species of the genus Kaloplocamus is K. ramosus (Cantraine, 1835) and senior author suggests a replacement name — K. verrilli Martynov, nom. nov. for Issa ramosa Verriill et Emerton because of secondary homonymy.