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 similatum sp. nov. urn:lsid:zoobank.org:act: 936AB769-443E-464C-B40D-A911A6E69ABF Fig. 104 Etymology Johnson ms name. Material examined Holotype PERU • ♀ ; surroundings of Tarapoto ; Franz leg.; MMUE . Paratypes PERU • 5 ex. ; same collection data as for holotype; 1 ♀ mounted verso; MMUE , BMNH . Description SIZE. Habitus ( Fig. 104A ), length 0.71 mm . COLOUR. Dark brown, shining, pubescence, legs and antennae dusky yellow. HEAD. With a series of linear foveae between the eyes interrupted medially, width across eyes 0.20 mm ; mentum parallel-sided; antennomeres III–XI, length 0.36 mm , III–IX length 0.16 mm , X–XI length 0.20 mm . PRONOTUM. 0.19 mm long, 0.30 mm wide, sparsely pubescent and shallowly foveolate in basal half; lateral margins sharply angled then concave to acute hind angles, anterior angles strongly bordered and outstanding in dorsal view, lateral border not continuing along the basal margin, medial emargination opposite scutellum angulate ( Fig. 104B ). ELYTRA. 0.47 mm long, 0.38 mm wide, pubescent as pronotum. MESOVENTRITE. Without a medial extension of collar; mid-keel with concave sides, anterior angles meeting collar, posterior angles effaced before mesocoxa anterior borders, with a short, broad, angled posterior margin; keel with ± four setae, very wide tapering to a rounded termination close to base of mesocoxae; mesoventral lateral margins straight becoming effaced; humeri bluntly rounded ( Fig. 104C ). METAVENTRITE. Sparsely pubescent, length 0.17 mm , disc simple, width across spines 0.13 mm ; posterior margin of mesocoxae serrate. WINGS. Macropterous. GENITALIA. Female spermatheca globular. Males not known. Remarks Distinguished from the other species of smaller Peruvian Cissidium by the absence of a median extension of the mesoventral collar.