A revision of Heterosignum (Asellota, Isopoda, Paramunnidae) with descriptions of three new species

Authors: Shimomura M.; Mawatari S.F.

Source: Journal of Natural History, Volume 36, Number 17, 25 December 2002 , pp. 2103-2126(24)

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Abstract:

Three new species of Heterosignum are described from Japan. Heterosignum elegans sp. nov. differs from its congeners in having stout preorbital lobes on the head, very long lateral spine-like processes and eyestalks, and very long article 2 of male pleopod 2. Heterosignum ohtsukai sp. nov. is distinctive in having a marked stout mid-dorsal spine on the head, long mid-dorsal spines on the pereonites, and article 2 of antenna 1 with a distolateral protrusion. Heterosignum otsuchiensis sp. nov. has single lateral spine-like processes on pereonites 1-7 as in H. ohtsukai, but is distinguished from it in having short mid-dorsal spines on pereonites 1-7 and long basis of pereopod 1. Heterosignum mutsuensis Gamô, 1976 is redescribed using newly collected specimens. Coulmannia unicornis Kensley, 1976 is assigned to Heterosignum after careful examination of the types. The diagnosis of Heterosignum is emended to include all the five species so far recorded.

Keywords: REVISION; HETEROSIGNUM; NEW SPECIES; COULMANNIA; ASELLOTA; PARAMUNNIDAE; ISOPODA

Document Type: Research article

Publication date: 2002-12-25

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