Orcus frommi, Łączyński, 2012

Łączyński, Piotr, 2012, On the genus Orcus Mulsant with descriptions of new species (Coleoptera: Coccinellidae: Chilocorini), Journal of Natural History 46 (39 - 40), pp. 2401-2414 : 2404-2407

Orcus frommi sp. nov.

( Figures 1, 2 A–D, 3A)

Material

Holotype male. “ New Guinea (NE), Mt Otto, 2200 m, 24 June 1955 / J.L. Gressitt Collector ” ( BPBM).

Paratype female. “ New Guinea (NE), Garaina, 800 m, 16 January 1958 / J.M. Sedlacek Collector ” ( BPBM) .

Diagnosis

This species is similar to Orcus cinctus , but is easily distinguished by the blackish pronotal disc and purple and greenish elytral disc.

Description

Length 2.98–3.05 mm; TL / EW 1.01–1.03; PL / PW 0.20–0.22; EL / EW 0.91–0.93.

Body ( Figures 2A, 3A) rounded and convex, pronotal margins moderately broad; elytral margins moderately explanate. Head black; pronotum blackish except for yellowish anterior angles and lateral margins; labrum, ventral mouthparts and antennae pale brown. Scutellum black. Elytra with strong metallic reflection, predominantly greenish, darker along suture, with narrow purple line running just inside elytral margins, elytral margins yellow. Punctures on pronotum 1.0–1.5 diameters apart, moderately coarse and deep; punctation on elytra slightly sparser, with punctures very deep, about as large as eye facets or slightly larger, 1.5–2.0 diameters apart. Ventral surface black.

Head flat medially, weakly punctate, covered with rather sparse and short setae. Clypeus ( Figure 2B) strongly emarginate anteriorly. Eyes moderately large, finely faceted, dorsally separated by about 2.2 times width of eye; interocular distance about 0.54 times head width; inner margins of eyes slightly rounded, convergent anteriorly. Maxilla with terminal palpomere ( Figure 2C) about 1.9 times longer than wide, outer margin about 2.2 times as long as inner, subparallel along basal half, tapering apically. Labium with terminal palpomere ( Figure 2C) at base about 0.8 times as wide as penultimate at apex. Antenna composed of nine antennomeres, antennomere 9 slightly longer than antennomere 8 and tapering to apex.

Prothorax about 0.9 times basal width of elytra; pronotal base bordered; pronotal hypomeron with fovea vestigial; prosternum smooth; prosternal process ( Figure 2C) truncate at apex, at middle about 0.25 times as wide as longer procoxal diameter; prosternum in front of coxae about 0.5 times as long as procoxal longitudinal diameter. Mesoventral intercoxal process ( Figure 2D) about 0.94 times mesocoxal longest diameter, covered with sparse short hair; meso-metaventral junction almost straight. Metaventrite ( Figure 2D) with complete discrimen; postcoxal lines weakly arcuate laterally, joined at middle, before junction each recurving posteriorly.

Elytral epipleuron ( Figure 2A) with maximum width at metaventrite, narrowing posteriorly but complete to apex, with foveae vestigial.

Legs moderately stout; tarsal claw with distinct, subtriangular basal tooth.

Abdomen ( Figure 1A,D) with five ventrites in both sexes; postcoxal lines of first ventrite joined at middle, posteriorly almost reaching hind margin of ventrite I and weakly recurving anteriorly; ventrite I along midline about 2.8 times longer than ventrite II; ventrite V with apical margin rounded in both sexes. Abdominal segment VIII ( Figure 1B,C) with sternite rounded in both sexes. Male genital segment as in Figure 1F.

Male genitalia ( Figure 1E,I,J). Penis guide scarcely shorter than parameres; apex of penis as in Figure 1J.

Female genitalia ( Figure 1G,H). Coxites triangular; sperm duct consists of two parts of almost same diameter; spermatheca ( Figure 1H) with distinct, very long gland. Infundibulum proper absent ( Figure 1G), but bursal appendix present in the form of a sclerotized spur.

Distribution

Papua New Guinea.

Etymology

This species is dedicated to the memory of Erich Fromm, a twentieth century humanistic philosopher and founder of humanistic psychoanalysis.