Cissidium riparium sp. nov.

urn:lsid:zoobank.org:act: 3A299211-20B2-4DD6-9B38-09F2085ADED1

Figs 7A, 40

Etymology

Johnson ms name, after the riparian habitat of the specimen.

Material examined

Holotype NEW CALEDONIA • ♀; S, Riviere Bleu; H. Franz leg.; MM holotype; MMUE.

Description

SIZE. Habitus (Fig. 40A), length 0.58 mm.

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

HEAD. With a shallow linear depression between the eyes; width across eyes 0.19 mm; antennomeres III–XI length 0.31 mm, III–IX length 0.19 mm, X–XI length 0.12 mm; mentum as Fig 4A.

PRONOTUM. Length 0.15 mm, width 0.25 mm, almost glabrous but some scattered pubescence anteriorly and at sides, posterior margin with four large foveae separated medially into two pairs, and two pairs of smaller foveae outside these; lateral margins rounded straightening to almost parallel-sided before the rectangular hind angles, bordered, the border not continuing along the posterior margin, medial emargination in front of scutellum sinuate (Fig. 40B).

ELYTRA. Length 0.42 mm, width 0.33 mm with a few scattered setae, appearing glabrous.

MESOVENTRITE. Medial extension of collar very widely based, sharply tapering to a point before raised portion of mid-keel; mid-keel wide, sides concave, the hind angles with carinae reaching to the mesocoxa; anterior borders; keel with ± five setae in basal half tapering to parallel-sided and rounded termination at base of mesocoxae; mesoventral lateral margins serrate in basal half; humeri toothed (Fig. 40C).

METAVENTRITE. Sparsely pubescent, disc simple, length 0.14 mm, width between spines 0.11 mm (Fig. 7A); posterior margins of mesocoxal cavities serrate.

WINGS. Macropterous.

GENITALIA. Female spermatheca globular. Males not known.

Remarks

Distinguished from other New Caledonian species by the wide anterior margin of the medial collar extension.