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 scutellaris ( Deane, 1931 ) Figs 5C , 43 Etymology Derivation unclear. Material examined Holotype AUSTRALIA • ♂ ; Queensland , Caves Track , Sinna Burra , Lamington Nat. Park ; 4 May 1966 ; leaf litter ; R.A. Crowson leg.; MMUE . Paratypes AUSTRALIA • 2 ♀♀ ; same collection data as for holotype; MMUE • 2 ex. ; Queensland , Picnic Rock Trail , O’Reilly’s , Lamington Nat. Park ; 3 Sep. 1966 ; fungus bark sample ; R.A. Crowson leg.; MMUE • 2 ♀♀ ; Queensland , Maiala Nat. Park , Mt. Glorious , Brisbane ; 4 Aug. 1966 ; mixed leaf litter ; R.A. Crowson leg.; BMNH . Fig. 43. Cissidium scutellare ( Deane, 1931 ) . A . Habitus. B . Pronotum, × 655. C . Mesoventrite showing median process of collar, mid-keel and keel, × 1480. Description SIZE. Habitus ( Fig. 43A ), length 0.67 mm . COLOUR. Yellow brown, head darker, pubescence, legs and antennae dusky yellow. HEAD. With a shallow medial depression between eyes, width across eyes 0.22 mm ; mentum with rounded anterior angles; antennomeres III–XI, length 0.37 mm , III–IX length 0.21 mm , X–XI length 0.16 mm . PRONOTUM. Length 0.19 mm long, width 0.30 mm , base with series of four foveae on each side the innermost pair being smaller, the pair opposite the scutellary angles being larger than the others, surface sparsely pubescent without foveolae; sides rounded, becoming almost parallel to rectangular hind angles, bordered, the border not continuing along the posterior margin, median emargination opposite scutellum sinuate ( Fig. 43B ). ELYTRA. 0.49 mm long, 0.40 mm wide, pubescent and foveolate contrasting with the pronotum. MESOVENTRITE. Medial extension of collar widely based tapering to mid-point of mid-keel; mid-keel widest anteriorly then sides concave to narrower hind angles, sharply raised medially with a domed top before the keel; keel without setae, narrow parallel-sided to blunt termination close to base of mesocoxae ( Fig. 5C ); mesoventral lateral margins evenly rounded, without serrations; humeri toothed ( Fig. 43C ). METAVENTRITE. Length 0.16 mm , sparsely pubescent, almost glabrous, disc simple, distance across spines 0.12 mm . WINGS. Macropterous. GENITALIA. Male aedeagus as Fig. 6 Ia–b. Female spermatheca globular. Remarks See remarks under C. deanei sp. nov. The broad median extension of the mesoventral collar coupled with the parallel-sided keel lacking setae distinguish this species.