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 ishigakiense Sawada, 2008 Fig. 29 Material examined Paratype JAPAN • 1 ♂ ; Komi , Ishigaki Island , Okinawa Pref. ; 9 May 1999 ; pile of straw; Y. Sawada leg.; mounted as a disarticulated slide; YS . Fig. 29. Cissidium ishigakiense Sawada, 2008 . A . Habitus. B . Pronotum from slide preparation. C . Meso- and metaventrite from slide preparation. Supplementary description The description below concentrates on amplifying Sawada (2008) with more details of the meso- and metaventral characters in order to conform with the entries in the present paper. SIZE. Habitus ( Fig. 29A copied from Sawada 2008 ), length 0.7 mm . COLOUR. Dark brown, antennae dusky yellow. HEAD. Width across eyes 0.32 mm ; mentum obscured; antennomeres III–XI, length 0.33 mm , III–IX length 0.17 mm , X–XI length 0.16 mm . PRONOTUM. 0.17 mm long, 0.27 mm wide, lateral margins rounded then almost parallel sided to rectangular hind angles, bordered, the borders not continuing along the posterior margin, medial emargination opposite the scutellum shallowly sinuate ( Fig. 29B ). ELYTRA. 0.42 mm long, 0.40 mm wide. MESOVENTRITE. Medial extension of collar tapering from broad base to mid-point of mid-keel; mid-keel sides concave, hind angles not reaching mesocoxal anterior borders, raised medially before keel; keel long, narrow, terminating in a point between the mesocoxae; mesoventral lateral margins serrate in posterior half; humeri toothed ( Fig. 29C ). METAVENTRITE. Sparsely pubescent, length 0.12 mm , disc simple, width across spines 0.08 mm ; posterior margin of mesocoxae serrate. GENITALIA. Male aedeagus as Fig. 6 Fa–b but slightly more elongate. Females not known. Remarks This is the only Japanese species into this group apart from C. matthewsi Johnson, 2007 . It may be distinguished from that species and all other Japanese species by the narrow almost parallel sided elytra.