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 misellum sp. nov. urn:lsid:zoobank.org:act: BE7C5078-DF8C-4C85-B5EB-8F0D3B2ED665 Fig. 34 Etymology Johnson ms name after the Latin adjective misellus meaning poor, little. Material examined Holotype NEW CALEDONIA • ♂ ; Table d’Union , b Col d’Amieu ; MM holotype ; MMUE . Paratypes NEW CALEDONIA • 2 ♂♂ ; same collection data as for holotype; one mounted verso; MMUE , BMNH . Description SIZE. Habitus ( Fig. 34A ), length 0.60 mm . Fig. 34. Cissidium misellum sp. nov. A . Habitus. B . Pronotum, × 550. C . Mesoventrite showing median process of collar, mid-keel and keel, × 745. COLOUR. Dark brown, pubescence, legs and antennae dusky yellow. HEAD. Head without a linear depression between or behind the eyes, width across eyes 0.20 mm : antennomeres III–XI length 0.37 mm , III–IX length 0.19 mm , X–XI length 0.11 mm . globular; mentum and prementum obscured. PRONOTUM. Length 0.16 mm , width 0.24 mm , sparsely pubescent without foveolae but with six foveae along the posterior margin in two pairs of three the outer pair very small, the median two pairs larger, merging to form two large foveae; sides rounded slightly concave to acute hind angles, bordered, the border not continuing along the posterior margin which has a sinuous emargination in front of the scutellum ( Fig. 34B ). ELYTRA. Length 0.40 mm , width 0.32 mm ; pubescent and foveolate markedly contrasting with the pronotum. MESOVENTRITE. Median process of mesoventral collar almost reaching posterior margin of mid-keel; mid-keel parallel-sided, the posterior angles rounded not reaching mesocoxae, raised sharply before joining keel; keel with ± four setae, narrow, terminating in a point at the interruption of the mesocoxal borders; mesoventral lateral margins angled and serrate posteriorly; humeri toothed ( Fig. 34C ). METAVENTRITE. Length 0.15 mm , setose, disc simple, width across spines 0.09 mm , spines narrow, sharply pointed. WINGS. Macropterous. GENITALIA. Aedeagus as Fig. 6 Fa–b. Female not known. Remarks The short parallel sided mid-keel is only likely to be confused among the New Caledonian species with C. houailou sp. nov. from which it differs by its smaller size.