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 plaumanni sp. nov. urn:lsid:zoobank.org:act: 42B630C8-C99C-4238-AA11-0ECF0C0D6E13 Figs 7B , 79 Etymology Johnson ms name, after the collector Fritz Plaumann. Material examined Holotype BRAZIL • ♂ ; Sta. Cat.; Apr. 1960 ; 27°9′ S , 52°15′ E ; F. Plaumann leg.; FMNH . Paratypes BRAZIL • 12 ex. ; same collection data as for holotype; 1 mounted verso, 4 mounted as slides; FMNH , MMUE , BMNH . Description SIZE. Habitus ( Fig. 79A ), length 0.59 mm . COLOUR. Yellow brown, antennae, legs and pubescence yellow. HEAD. Antennomeres III–XI length 0.32 mm , III–IX length 0.18 mm , X–XI length 0.14 mm ; width across eyes 0.19 mm ; mentum as Fig. 4A. Fig. 79. Cissidium plaumanni sp. nov. A . Habitus. B . Pronotum, × 590. C . Mesoventrite showing median process of collar, lateral margin, mid-keel and keel, × 740. PRONOTUM. Length 0.17 mm , width 0.24 mm , pubescent, the setal insertion points slightly raised, without foveae and foveolae; lateral margins rounded to hind angles, bordered, the border rectangular at the hind angles and continued for a short distance along the hind margin then recursive, medial emargination opposite scutellum clearly defined ( Fig. 79B ). ELYTRA. Length 0.37 mm , width 0.33 mm pubescent as pronotum. MESOVENTRITE. Collar with a parallel-sided median extension; mid-keel narrow, parallel-sided, without anterior and posterior projections; keel very narrow tapering to a sharp point just below the interruption point of the mesocoxal margins; mesoventral lateral margins without serrations, humeri with large teeth ( Fig. 79C ). METAVENTRITE. Sparsely pubescent, disc simple, length 0.13 mm , width between spines 0.08 mm , spines long, sharply pointed ( Fig. 7B ); mesocoxal posterior margins not serrate. WINGS. Macropterous. GENITALIA. Male aedeagus as Fig. 6 Fa–b; female spermatheca globular. Remarks Distinguished from the other species of Cissidium from Brazil in this group by the recursive terminations of the posterior borders of the pronotum.