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 pauxillum Darby, 2019 Fig. 59 Material examined Holotype MALAYSIA • Sarawak , 4 th division, Gunung Mulu National Park ; May–Aug. 1978; base comp, alluvial forest litter near laboratory ; P.M. Hammond and J.E. Marshall leg., BM 1978-49; BMNH . Supplementary description The following description amplifies the type description of Darby (2019) , by adding more details of the meso- and metaventral characters, in order to conform with the entries in the present paper. SIZE. Habitus ( Fig. 59A ), length 0.68 mm . COLOUR. Yellow, antennae, legs and pubescence paler yellow. HEAD. Distance across eyes 0.18 mm ; antennomeres III–XI, length 0.25 mm , III–IX, length 0.15 mm , X–XI length 0.10; mentum as Fig. 4A. PRONOTUM. Length 0.17 mm , width 0.27 mm , densely foveolate and pubescent throughout, without foveae; side margins evenly curved to rectangular hind angles, lateral margins continued along base to the angulate medial emargination opposite the scutellum ( Fig. 59B ). ELYTRA. Length 0.37 mm , width 0.30 mm , foveolate and pubescent throughout. MESOVENTRITE. Short, collar without reticulation though with a little medial coarse sculpturing, medial extension broadening posteriorly; mid-keel short, anterior angles almost reaching collar, posterior angles not reaching mesocoxal anterior borders, setose before junction with keel; keel tapering then narrow and parallel-sided before pointed termination at interruption of mesocoxal margins; humeri with sharply projecting teeth; mesoventral lateral margins serrate ( Fig. 59C ). METAVENTRITE. With scattered pubescence, length 0.11 mm , disc simple, width across spines 0.09 mm , spines long, sharply pointed. Remarks This is the only species from Malaysia in this group which has strongly concave margins to the mesoventral mid-keel. The genitalia have not been dissected.