A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species Author Darby, Michael text European Journal of Taxonomy 2020 2020-04-02 622 1 188 journal article 22458 10.5852/ejt.2020.622 9cb3ea96-0ee4-40b4-8006-19b5fed80b46 3777282 9CD3B2CD-F072-4994-8CA9-24145D343401 Cissidium waginicum sp. nov. urn:lsid:zoobank.org:act: 6DA410C3-BFCB-4D21-99B4-3CDC3D8B255E Fig. 114 Etymology Johnson ms name, after Wagina Island, where the specimen was collected. Material examined Holotype SOLOMON ISLANDS • ♀ ; Choiseul , Wagina Is. ; 25 May 1966 ; no. 23078; P. Greenslade leg.; BMNH . Description SIZE. Habitus ( Fig. 114A ), length 0.71 mm . COLOUR. Yellow brown, pubescence antennae and legs dusky yellow. HEAD. Width across eyes 0.22 mm ; antennomeres III–XI length 0.38 mm , III–IX length 0.21 mm , X–XI length 0.17 mm . PRONOTUM. 0.18 mm long, 0.31 mm wide; sparsely covered with large, shallow and irregular foveolae, base with a series of four foveae on each side, the two series separated by a distinct space opposite scutellum; lateral margins sharply angled, thence narrowed in a weakly concave line to somewhat effaced but obtusely angled front angles visible in dorsal view, rearwards concave to slightly acute hind angles; sides conspicuously bordered, the border continued along the entire length of the posterior margin, median emargination opposite the scutellum sinuous, barely visible ( Fig. 114B ). ELYTRA. 0.60 mm long, 0.41 mm wide, basal third sparsely covered with rather large foveolae. MESOVENTRITE. Median process of collar short, pointed; mid-keel wide, sides concave, anterior margin slightly wider than posterior which has well marked flat carinae joining the mesocoxal anterior margins, raised medially to a point before the keel; keel parallel-sided with rounded termination just past the interruption point of the mesocoxal borders; mesoventral lateral margins serrate; humeri toothed ( Fig. 114C ). Fig. 114. Cissidium waginicum sp. nov. A . Habitus. B . Pronotum, × 455. C . Mesoventrite showing median process of collar, mid-keel and keel, × 655. METAVENTRITE. Length 0.14 mm , disc simple, distance across spines 0.11 mm ; posterior borders of mesocoxae serrate. WINGS. Female apterous. Male unknown. Remarks Most likely to be confused with C . kolobangaricum sp. nov. in this group from the Solomon Islands , but distinguished by the wider mid-keel, and narrower pronotal base.