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 greensladei sp. nov. urn:lsid:zoobank.org:act: 4F505BEE-816C-4B98-A537-37DA9480F89A Figs 6L , 7C , 25 Etymology Johnson ms name, in recognition of the late P. Greenslade, collector of this and other Solomon Island specimens. Material examined Holotype SOLOMON ISLANDS • ♂ ; Guadalcanal , Mt. Austen ; 22 Jul. 1963 ; no. 11278; P. Greenslade leg.; BMNH . Paratypes SOLOMON ISLANDS • 1 ♂ ; Guadalcanal , Kukum ; Jun.–Jul. 1966 ; no. 21759; P. Greenslade leg.; BMNH • 1 ♂ ; Mt. Austen ; 14 May 1963 ; no. 6048; P. Greenslade leg.; MMUE • 1 ♀ ; same collection data as for preceding but 29 Nov. 1963 ; no. 11031; MMUE • 1 ♂ ; same collection data as for preceding but 21 Sep. 1965 ; no. 19247; MMUE • 1 ♀ ; same collection data as for preceding but Feb. 1966 ; no. 21243; BMNH • 1 ♂ ; same collection data as for preceding but Mar. 1966 ; no. 21336; BMNH . Fig. 25. Cissidium greensladei sp. nov. A . Habitus. B . Pronotum, × 565. C . Mesoventrite showing median process of collar, mid-keel and keel, × 455. Description SIZE. Habitus ( Fig. 25A ), length 0.67 mm . COLOUR. Dusky yellow. HEAD. Shallowly foveolate between eyes, width across eyes 0.21 mm ; antennomeres III–XI 0.32 mm long, III–IX 0.16 mm long, X–XI 0.16 mm ; mentum as Fig.4A. PRONOTUM. Length 0.19 mm , width 0.29 mm , sparsely pubescent, base with a series of five or six foveae of approximately equal size and spacing but with a wider gap opposite the scutellum; sides sharply angled, slightly convexly curved to rectangular hind angles, front angles obtuse, not evenly rounded, conspicuously bordered, the border not continuing along the posterior margin which has a sinuous emargination before the scutellum ( Fig. 25B ). ELYTRA. Length 0.43 mm , breadth 0.37 mm ; foveolate, the foveolae more conspicuous and denser in the basal half. MESOVENTRITE. Medial extension of collar short, pointed; mid keel wider anteriorly, hind angles with carinae to mesocoxae, medially raised with a ridge; keel narrow with ± three setae tapering to a point past the mid-point of the mesocoxae; mesoventral lateral borders serrate in posterior half; humeri toothed ( Fig. 25C ). METAVENTRITE. Length 0.13 mm , no spines detected but two clear foveae may mark their insertion points if abraded, width across these 0.11 mm , with a large medial fovea on disc in front the mesocoxae ( Fig. 7C ), disc slightly depressed behind this; mesocoxal posterior margins serrate. WINGS. Macropterous. GENITALIA. Male aedeagus ( Fig. 6L ). Female spermatheca globular. Remarks Distinguished from other species from the Solomon Islands in this group by the narrower mesoventral mid-keel and the form of the male aedeagus.