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 angusi sp. nov. urn:lsid:zoobank.org:act: A1B4A3E6-D811-4560-87A1-D36B12D2391B Fig. 63 Etymology Named after my colleague Dr Robert Angus . Material examined Holotype BRAZIL • ♀ ; Bocaiuva , Parana ; Dec. 1963 ; F. Plaumann leg.; FMNH . Paratypes BRAZIL • 4 ♀♀ ; same collection data as for holotype; one mounted verso, one mounted as a slide; MMUE , BMNH . Description SIZE. Habitus ( Fig. 63A ), length 0.95 mm . COLOUR. Yellow brown, head slightly darker, pubescence, legs and antennae slightly paler. HEAD. With a clearly marked linear depression behind the eyes, width across eyes 0.23 mm ; antennomeres III–XI length 0.42 mm , III–IX length 0.25 mm , X–XI length 0.17 mm ; mentum as Fig 4E though sides slightly more sinuous. PRONOTUM. Length 0.24 mm , width 0.32 mm , pubescent, without foveae; side margins rounded and then concave to acute hind angles, bordered, the border extending along the posterior margin to the medial emargination opposite the scutellum ( Fig. 63B ). ELYTRA. Length 0.55 mm , width 0.47 mm , pubescent, length of setae as pronotum. MESOVENTRITE. Medial extension of collar widening posteriorly; anterior margin of mid-keel wider than posterior, posterior margin not reaching anterior margin of mesocoxal cavities; keel with a series of ± eight setae tapering to point above the interruption of the mesocoxal borders; mesoventral lateral margins without serrations; humeri toothed ( Fig. 63C ). METAVENTRITE. Length 0.17 mm , width across spines 0.13 mm , with scattered setae, disc simple; posterior margins of mesocoxal cavities not serrate. WINGS. Macropterous. GENITALIA. Female spermatheca globular. Male not known. Remarks One of the three Brazilian species in this group, and distinguished by the parallel-sided median extension of the mesoventral keel together with the wide anterior angles of the mid-keel and the long tapering keel.