Cissidium lamington Darby 2020, sp. nov.

Cissidium lamington sp. nov.

urn:lsid:zoobank.org:act: C49061B6-8A0D-4C18-9DD4-CA06BC9D4F13

Fig. 30

Named after the Lamington National Park, part of the Gondwana Forest World Heritage Area on the Gold Coast of Queensland, Australia where the insect was collected. Noun in apposition.

Holotype

AUSTRALIA • ♂; S. Queensland, Picnic Rock Trail, O’Reilly’s, Lamington Nat. Park; 3 Sep. 1966; R.A. Crowson leg.; MMUE.

SIZE. Habitus (Fig. 30A), length 0.72 mm.

COLOUR. Yellow brown.

HEAD. With a shallow fovea between the eyes, width across eyes 0.22 mm; antennomeres III–XI length 0.38 mm, III–IX length 0.25 mm, X–XI length 0.13 mm; mentum sides rounded.

PRONOTUM. Length 0.18 mm, width 0.30 mm, pubescent the setae sparse on the disc, more numerous near the sides, with a row in basal third of two pairs of four foveae separated by the width of the scutellum, lateral margins rounded then almost parallel-sided to rectangular hind angles, bordered, the border not continuing along the posterior margin which has a sinuous emargination opposite the scutellum (Fig. 30B).

ELYTRA. Length 0.49 mm, width 0.35 mm, foveolate in basal third, pubescence as pronotum.

MESOVENTRITE. Medial extension bluntly pointed; mid-keel widened anteriorly, posterior corners not reaching mesocoxae, sharply raised medially before junction with keel; keel with ± six setae, parallelsided, terminating below midpoint of the mesocoxae; mesoventral lateral margins with serrations in basal third; humeri toothed, the posterior border long (Fig. 30C).

METAVENTRITE. Length 0.18 mm, distance across the narrow, sharply pointed spines 0.10mm, disc simple; posterior margins of mesocoxae not serrate.

WINGS. Macropterous.

GENITALIA. Male aedeagus as Fig. 6 Fa–b. Females not known.

See remarks under C. deanei sp. nov. The narrow, pointed median extension of the mesoventral collar coupled with the setose keel distinguish this species.