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 ibicarense sp. nov. urn:lsid:zoobank.org:act: 2C9DAF49-AA1D-4D25-9365-428C13EAB2CC Figs 3F , 93 Etymology Johnson ms name, after Ibicare, a municipality in Santa Catarina in the South region of Brazil , where the insect was found. Material examined Holotype BRAZIL • ♀ ; Ibicare ; 600 m a.s.l. ; Sep. 1960 ; F. Plaumann leg.; FMNH . Paratypes BRAZIL • 10 ex. ; same collection data as for holotype; one mounted verso; FMNH , MMUE , BMNH . Description SIZE. Habitus ( Fig. 93A ), length 0.78 mm . COLOUR. Yellow brown, shining, pubescence and antennae slightly paler. HEAD. With a depression behind the eyes composed of foveae of different shapes, interrupted medially ( Fig. 3F ), width across eyes 0.22 mm ; antennomeres III–XI length 0.38 mm , III–IX length 0.24 mm , X–XI length 0.14 mm ; mentum and prementum as Fig. 4B , base of mentum with a row of differently shaped foveolae interrupted by a narrow transverse depression. PRONOTUM. Length 0.23 mm , width 0.34 mm , pubescent, without foveae, shallowly foveolate; lateral margins strongly bordered and sharply angled, concavely rounded to base, borders not continuing along posterior margin, hind angles sharply acute, posterior margin with emargination opposite the scutellum ( Fig. 93B ). ELYTRA. Length 0.54 mm , width 0.40 mm , pubescent, setae same length as pronotum, foveolate the foveolae more strongly marked in basal half. MESOVENTRITE. Collar with a median parallel-sided extension; mid-keel widest anteriorly, posterior corners effaced before reaching mesocoxal anterior borders, sharply raised at junction with keel with ± three setae from concave foveolae; keel tapering to pointed termination between the mesocoxae; mesoventral lateral margins rectangular without serrations; humeri toothed, posterior margins long and sinuous ( Fig. 93C ). METAVENTRITE. Length 0.16 mm , setose, disc simple, width across spines 0.11 mm , spines long, sharply pointed; posterior margins of mesocoxae serrate. Fig. 93. Cissidium ibicarense sp. nov. A . Habitus. B . Pronotum, × 505. C . Mesoventrite showing median process of collar, mid-keel and keel, × 1380. WINGS. Macropterous. GENITALIA. Female spermatheca globular. Males not known. Remarks One of the five Brazilian species in this group. Distinguished by the anterior angles of the mesoventral mid-keel which do not fuse with the collar.