Cissidium pinense, 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 : 61-63

Cissidium pinense sp. nov.

urn:lsid:zoobank.org:act:7AAC3F0E-C71E-4988-8916-B9C5A59C0B36

Fig. 39

Etymology

Johnson ms name, after the place of collection.

Material examined

Holotype

NEW CALEDONIA • ♀; Pic du Pin; H. Franz leg.; MMUE.

Description

SIZE. Habitus ( Fig. 39A ), length 0.73 mm.

COLOUR. Dark red brown, antennae, legs and pubescence dusky yellow.

HEAD. With a very shallow linear depression between the eyes, width across eyes 0.23 mm; antennomeres III–XI length 0.45 mm, III–IX length 0.26 mm, X–XI length 0.19 mm; mentum tapering towards base but not as pronounced as Fig. 4F.

PRONOTUM. Fig. 39B , length 0.21 mm, width 0.31 mm, sparsely pubescent, six foveae across base the central four equally spaced, larger than the outside pair; lateral margins rounded anteriorly almost parallel-sided in basal half, hind angles slightly acute, bordered, the border not continued along the hind margin; median emargination opposite scutellum present only as a slight insinuation.

ELYTRA. Length 0.48 mm, width 0.42 mm sparsely pubescent and shallowly foveolate contrasting with the pronotum.

MESOVENTRITE. Collar with a long tapering median extension; mid-keel parallel-sided the front angles rounded before reaching the collar creating two converging depressions, hind angles with short carinae not reaching the mesocoxal anterior borders, strongly raised before keel to form a blunt projection; keel with ± three setae, broad, flat, tapering to a rounded termination between the mesocoxae; mesoventral lateral margins serrate in posterior half; humeri sloping posteriorly, barely toothed ( Fig. 39C ).

METAVENTRITE. Sparsely pubescent, disc simple, length 0.15 mm width between spines 0.14 mm, spines narrow, sharply pointed; margins of mesocoxal cavities not serrate.

WINGS. Apterous.

GENITALIA. Female spermatheca globular. Males not known.

Remarks

See remarks for C. amieuense sp. nov. On mesoventral characters, this species is only likely to be confused with C. houailou sp. nov., but the keel differs in being wider and more tapering.

Figures

Fig. 39. Cissidium pinense sp. nov. A. Habitus. B. Pronotum, × 445. C. Mesoventrite showing median process of collar, mid-keel and keel, × 600.

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.