Cissidium kolombangaricum, Darby, 2020

Darby, Michael, 2020, A revision of Cissidium Motschulsky (Coleoptera: Ptiliidae) with seventy seven new species, European Journal of Taxonomy 622, pp. 1-188 : 175-177

Cissidium kolombangaricum sp. nov.

urn:lsid:zoobank.org:act:CAB500DC-351D-47A1-828B-C9207ADA4519

Figs 6M , 110

Etymology

Johnson ms name, named after Kolombangara Island in the Solomon Islands where the specimens were collected.

Material examined

Holotype

SOLOMON ISLANDS • ♂; Kolombangara , near Kuzi; 8–9 Sep. 1965; forest litter on coral limestone; P.N. Lawrence leg.; BMNH.

Paratype

SOLOMON ISLANDS • 1 ♀; Kolombangara , north of Kuzi; 500 ft a.s.l.; 6 Oct. 1965; forest litter; no.721-750; P.N. Lawrence leg.; MMUE.

Description

SIZE. Habitus ( Fig. 110A ), length 0.72 mm.

COLOUR. Yellow brown, pubescence and antennomeres slightly paler.

HEAD. With a shallow transverse depression behind the eyes; eyes large, width across 0.21 mm; antennomeres III–XI length 0.29 mm, III–IX length 0.16 mm, X–XI length 0.13 mm; mentum sides slightly tapering posteriorly, front angles rounded.

PRONOTUM. Length 0.17 mm, width 0.30 mm, base with series of four or five foveae on each side, the two series hardly separated opposite scutellum; slightly smaller foveae anterior to these at sides of disc; lateral margins sharply angled, almost parallel to rectangular hind angles, front angles prominent, rounded, conspicuously bordered, borders not continued along the posterior margin, medial emargination in front of scutellum sinuous ( Fig. 110B ).

ELYTRA. Length 0.44 mm, breadth 0.40 mm, basal third rather sparsely foveate.

MESOVENTRITE. Median process of collar pointed; mid-keel widest anteriorly, sides straight to posterior angles with carinae to mesocoxal anterior borders, sharply raised with ridged top to junction with keel; keel foveolate and setose, parallel-sided to rounded termination beneath interruption point of mesocoxal margins; mesoventral lateral margins serrate ( Fig. 110C ).

METAVENTRITE. Length 0.12 mm, pubescence very sparse almost entirely confined to lateral borders, width across spines 0.11 mm, disc strongly, triangularly depressed with a distinct medial fovea posteriad to mesocoxae.

GENITALIA. Male aedeagus ( Fig. 6M ).

Remarks

The male aedeagus of this species separates it from the other Solomon Islands Cissidium .

Figures

Fig. 6. Figures to show genitalia types. – Spermathecae. A. Cissidium bilineatum sp. nov. B. Cissidium amboroense Darby, 2015. C. Cissidium sawadai Darby, 2015. D. Cissidium arcuatum sp. nov. E. Cissidium murphyi sp. nov. – Aedeagi. F. Cissidium petri Darby, 2015. G. Cissidium clareae sp. nov. H. Cissidium fraternum sp. nov. I. Cissidium tigrum Darby, 2015. J. Cissidium apterum sp. nov. K. Cissidium brachypterum sp. nov. L. Cissidium greensladei sp. nov. M. Cissidium kolombangaricum sp. nov. N. Cissidium mindanao sp. nov.

Fig. 110. Cissidium kolombangaricum sp. nov. A. Habitus. B. Pronotum, × 425. C. Mesoventrite showing median process of collar, mid-keel and keel, × 390.