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 clareae sp. nov. urn:lsid:zoobank.org:act: 60592E41-BF69-4746-87C0-58D9D06F6370 Figs 6G , 19 Etymology Johnson ms name, named after his wife Clare. Material examined Holotype SOLOMON ISLANDS • ♂ ; Guadalcanal , Mt. Austen ; 14 Jul. 1964 ; no. 16411; P.J.M. Greenslade leg.; BMNH . Paratypes SOLOMON ISLANDS • 1 ♀ ; Guadalcanal , Mt. Austen ; 14 May 1963 ; no. 6018; P. Greenslade leg.; BMNH • 2 ♂♂ , same collection data as for preceding but 20 May 1963 ; no 6100; BMNH • 2 ♂♂ , same collection data as for preceding but 19 Jun. 1963 ; no. 6487; BMNH • 1 ♂ ; same collection data as for preceding but 1 Jul. 1963 ; no. 1269; MMUE • 1 ♀ ; same collection data as for preceding but 29 Jun. 1963 ; no. 11031; BMNH • 1 ♂ ; same collection data as for preceding but 22 Jul. 1963 ; no. 11278; MMUE • 1 ♀ ; same collection data as for preceding but 13 Oct. 1963 ; no. 11326; MMUE • 1 ♂ ; Mt. Jonapau ; 3500–3750 ft a.s.l. ; 6 May 1965 ; P. Greenslade leg.; BMNH • 1 ♂ ; Nuhu ; 1000 ft a.s.l. ; 28–31 Oct. 1965 ; forest litter ; P.N. Lawrence leg.; MMUE • 1 ♀ ; Popomanasiu ; 5000 ft a.s.l. ; Oct. 1965 ; litter sample 6 ; no. 20489; P. Greenslade leg.; BMNH • 1 ♀ ; New Georgia , Kolombangara ; nr Kuzi ; 50 ft a.s.l. ; 8 Sep. 1965 ; 781–800 m a.s.l. ; valley litter ; P.N. Lawrence leg.; BMNH • 1 ♀ , same collection data as for preceding; 3–9 Sep. 1965 ; forest litter ; BMNH . Additional material SOLOMON ISLANDS • 1 ♀ ; New Georgia , Wagina Is.; 3 Jul. 1965 ; no. 23223; P. Greenslade leg.; BMNH . Description SIZE. Habitus ( Fig. 19A ), length 0.66 mm . COLOUR. Yellow. HEAD. Without a clear linear depression behind the eyes, width across eyes 0.21 mm ; antennomeres III–XI length 0.44 mm ; mentum as Fig 4A. Fig. 19. Cissidium clareae sp. nov. A . Habitus. B . Pronotum, × 530. C . Mesoventrite showing median process of collar, mid-keel and keel, × 425. PRONOTUM. Length 0.20 mm , width 0.28 mm , sparsely pubescent with a series of six foveae along the posterior margin in two pairs of three separated by a wider median gap; lateral margins sharply angled, concave posteriorly to rectangular hind angles, strongly bordered, the border not extending along the posterior margin which has a sinuous emargination before the scutellum ( Fig. 19B ). ELYTRA. Length 0.44 mm , width 0.39 mm , pubescent, foveate in basal third. MESOVENTRITE. Medial extension of collar onto mid-keel pointed; mid-keel wider anteriorly, posterior corners clearly reaching mesocoxae, sharply raised medially before keel; keel with ± two setae, parallelsided to a blunt termination beyond interruption of mesocoxal margins; mesoventral lateral margins serrate in posterior half; humeri bluntly toothed ( Fig. 19C ). METAVENTRITE. Length 0.16 mm , with scattered pubescence and a shallow linear depression posterior to mesocoxae, disc in male strongly depressed, female with a small median fovea posterior to mesocoxae, width across the short triangular spines 0.12 mm ; posterior margins of mesocoxal cavities serrate. WINGS. Macropterous. GENITALIA. Male aedeagus Fig. 6G . Female spermatheca globular. Remarks Distinguished from the other Cissidium in this group from the Solomon Islands by the absence of a medial extension of the mesoventral collar.