Cissidium dewhurst, 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 : 76-77

Cissidium dewhurst sp. nov.

urn:lsid:zoobank.org:act:A543DF10-FBBF-4AAE-878A-C53CAEA25316

Fig. 48

Etymology

Named after the place of capture, noun in apposition.

Material examined

Holotype

MALAYSIA • ♂; Sabah, Kinabatangan district, SE end of Dewhurst Bay ; 2 Jun.1950; air sweep in primary forest; R.F. Inger and D.D.Davis leg.; FM( HD) #50.33; FMNH. Specimen found damaged, part of the remaining antenna was lost in the SEM.

Description

SIZE. Habitus ( Fig. 48A ), length 0.71 mm.

COLOUR. Dark brown, pubescence, antennae and legs paler.

HEAD. Frons obscured; eyes very prominent, width across 0.23 mm; antennomeres III–XI length 0.34 mm, III–IX length 0.18 mm, X–XI length 0.16 mm; mentum obscured.

PRONOTUM. Length 0.21 mm, width 0.30 mm, pubescent, setae confined mainly to lateral margins, with a pair of linear foveae at base; lateral margins rounded, slightly angled, hind angles rectangular, widely

bordered, border extending narrowly onto the posterior margin which has a sinuous emargination in in front of the scutellum ( Fig. 48B ).

ELYTRA. Length 0.43 mm, width 0.42 mm, pubescent, setae same length as pronotum, without foveolae.

MESOVENTRITE. Medial extension of collar broad; mid-keel lateral margins almost parallel, posterior corners not joining mesocoxal borders, barely raised at junction with keel; keel foveolate throughout (perhaps indicating presence of setae which have been abraded) tapering to blunt termination between the mesocoxae; mesoventral lateral margins shallowly serrate in posterior third; humeri toothed ( Fig. 48C ).

METAVENTRITE. Sparsely pubescent, with shallow medial depression, posterior margins of mesocoxal cavities not serrate.

WINGS. Macropterous.

GENITALIA. Male aedeagus as Fig. 6L . Female not known.

Remarks

The only species of Cissidium to have been described from Sabah.

Figures

Fig. 48. Cissidium dewhurst sp. nov. A. Habitus. B. Pronotum, × 530. C. Mesoventrite showing median process of collar, mid-keel, keel and lateral margin, × 565.

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.