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 latum Sawada, 2008 Fig. 52 Material examined Paratypes JAPAN • 1 ♂ ; Okinawa , Ryukyu , Gaji rindo, NE of Mt Terukubi ; 290 m a.s.l. ; 21 Oct. 1987 ; Y. Nishikawa leg.; BMNH • 1 ♂ ; Hiji , Kunigami-son , Okinawa Pref. ; 12 Apr. 1997 ; Y. Sawada leg.; YS . Supplementary description The following description amplifies the type description of Sawada (2008) to conform with the entries in the present paper. SIZE. Habitus ( Fig. 52A ), length 0.76 mm . COLOUR. Reddish brown to dark brown, antennae, legs and pubescence paler. HEAD. With a transverse row of indistinctly formed foveolae between the eyes. PRONOTUM. Length 0.21 mm , width 0.37 mm , densely pubescent and very shallowly foveolate throughout; side margins rounded to concave before rectangular hind angles, narrowly bordered, the border continuing along the entire posterior margin, which is without an emargination opposite the scutellum ( Fig. 52B ). ELYTRA. Length 0.47 mm , width 0.42 mm , pubescent more widely distributed than pronotum. MESOVENTRITE. Collar with 3 projecting setae along the posterior margin opposite the mid-keel, median extension widest anteriorly then slightly tapering posteriorly, with very short setae; mid-keel strongly sculpted and pubescent, widest medially; keel long, pointed, terminating past the mid-point of the mesocoxae; lateral margins very shallowly rounded, without serrations; humeri toothed ( Fig. 52C ). METAVENTRITE. 0.15 mm long, reticulate towards lateral margins, sparsely pubescent, disc simple, distance between spines 0.10 mm ; mesocoxal posterior borders serrate. GENITALIA. Male aedeagus as Fig. 6 Fa–b but beak not so strongly bent. Remarks This is one of three species in this group from Japan and differs from them and from all other Japanese Cissidium in having wider and more rounded elytra.