Cissidium noumeae, 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 : 58-60

Cissidium noumeae sp. nov.

urn:lsid:zoobank.org:act:6312A594-0589-4201-9780-98B097414FC7

Fig. 37

Etymology

Named after Noumea, the capital city of New Caledonia, close to which the insects were collected.

Material examined

Holotype

NEW CALEDONIA • ♀; Mont Koghis near Noumea; Sep. 1970; H. Franz leg.; MM holotype; MMUE.

Paratypes

NEW CALEDONIA • 1 ♀, 3 ♂♂; same collection data as for holotype; the ♀ mounted verso; MMUE, BMNH.

Description

SIZE. Habitus ( Fig. 37A ), length 0.76 mm.

COLOUR. Yellow brown, shining, antennae, legs and pubescence dusky yellow.

HEAD. With a shallow median depression between the eyes, width across eyes 0.24 mm; antennomeres III–XI length 0.37 mm, III–IX length 0.24 mm, X–XI length 0.13 mm; mentum as Fig. 4A but anterior border sinuous.

PRONOTUM. Length 0.23 mm, width 0.34 mm, sparsely pubescent, without foveolae but with a row of eight foveae along the posterior margin in two groups of four, the outer two in each group much small than the inner two; sides evenly and broadly rounded becoming parallel-sided in posterior half

before slightly obtuse hind angles, lateral borders wide, not continued along the basal margin, medial emargination in front of scutellum sinuous. ( Fig. 37B ).

ELYTRA. Length 0.49 mm, width 0.42 mm, sparsely pubescent and shallowly foveolate.

MESOVENTRITE. Collar with a tapering median extension widening posteriorly; mid-keel wide, parallelsided, the anterior angles rounded before reaching the collar, the posterior angles with broad, shallowly raised, partly effaced carinae to the mesocoxae; keel with two setae, broadly spatulate and reaching to the mid-point of the mesocoxae, the mesocoxae are not contiguous and separated in the holotype by a wide ‘u’-shaped perforation; mesoventral lateral margins rounded, serrate posteriorly; humeri strongly sloping, barely toothed ( Fig. 37C ).

METAVENTRITE. Glabrous, length 0.13 mm, width across spines 013 mm, spines small, short; margins of mesocoxal cavities not serrate.

WINGS. Macropterous.

GENITALIA. Female spermatheca globular.

Remarks

Differs from all other species described in this paper by the spatulate form of the mesoventral keel.

Figures

Fig. 37. Cissidium noumeae sp. nov. A. Habitus. B. Pronotum, × 547. C. Mesoventrite showing median process of collar, mid-keel and keel, × 760.

Fig. 4. Menta and submenta. A. Cissidium petri Darby, 2015, × 1380. B. Cissidium tigrum Darby, 2015, × 1220. C. Cissidium amboroense Darby, 2015, × 1260. D. Cissidium losbanos sp. nov., × 1100. E. Cissidium triangulum Darby, 2019, × 650. F. Cissidium pilosellum sp. nov., × 1420.