Cissidium glabratum, 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 : 15-16

Cissidium glabratum sp. nov.

urn:lsid:zoobank.org:act:09C451E7-C2F0-4F98-AF07-2A6492B08B72

Fig. 10

Etymology

Johnson ms name after the glabrous dorsal surface.

Material examined

Holotype

MADAGASCAR • ♂; Perinet, forest of transition; 928 m a.s.l.; 15 Apr. 1969; H. Franz leg. (Mg10); MMUE.

Paratypes

MADAGASCAR • 4 ♀♀, same collection data as for holotype; one mounted verso, two on one pin; MMUE, BMNH.

Description

SIZE. Habitus ( Fig. 10A), length 0.90 mm.

COLOUR. Dark brown, appearing polished, antennomeres and legs dusky yellow.

HEAD. With a transverse depression interrupted medially behind the eyes, width across eyes 0.23 mm; antennomeres III–XI length 0.45 mm, III–IX length 0.21 mm, very thin and elongate, X–XI length 0.24 mm; mentum as Fig. 4A.

PRONOTUM. Length 0.23 mm, width 0.32 mm, glabrous with two large basal foveae; lateral margins rounded almost parallel in basal third, narrowly bordered to rectangular hind angles, not continued along the posterior border which has a sinuous emargination before the scutellum ( Fig. 10B).

ELYTRA. Length 0.58 mm, width 0.44 mm, glabrous.

MESOVENTRITE. Collar with a broad medial extension lacking reticulation; mid-keel very short, anterior corners rounded, posterior corners joining mesocoxae with well-defined carinae, sharply raised prior to junction with keel; keel narrow, with ± four setae, slightly widening before termination at interruption of mesocoxal borders; mesoventral lateral margins serrate; humeri toothed ( Fig. 10C).

METAVENTRITE. Length 0.18 mm, sparsely pubescent towards lateral margins, disc plain, width across the thin, sharply pointed spines 0.15 mm; posterior margins of mesocoxal cavities partially serrate.

WINGS. Macropterous in both sexes.

GENITALIA. Male aedeagus as Fig. 6 Fa–b. Female spermatheca globular.

Remarks

Lacks the two ancilliary foveae of C. franzi sp. nov. and distinguished from both that species and C. glabratum sp. nov. by the angulate pronotal side margins.