Orcus popperi, 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 : 2410-2413

publication ID	https://doi.org/ 10.1080/00222933.2012.707244
persistent identifier	https://treatment.plazi.org/id/AD72A825-FFEC-DA46-FE7C-FD30FEFFA3CF
treatment provided by	Carolina
scientific name	Orcus popperi
status	sp. nov.

Treatment

Orcus popperi sp. nov.

( Figures 3C View Figure 3 , 5 View Figure 5 , 6 View Figure 6 )

Material

Holotype male. “N. Guinea: NE, Bulldog Rd. , 2700–2800 m, 40 km SW Wau / 22–31 May 1967 / J.M. Sedlacek Collector ” ( BPBM).

Paratypes. “N. Guinea: NE, Bulldog Rd. , 2700–2800 m, 40 km SW Wau / 22–31 May 1967 / J.M. Sedlacek Collector ” (9: BPBM) .

Diagnosis

The coloration of this species is unique within the genus and separates it easily from all its congeners.

Description

Length 3.45–3.65 mm; TL / EW 1.10–1.15; PL / PW 0.22–0.28; EL / EW 0.98–1.02.

Body ( Figures 3C View Figure 3 , 5A View Figure 5 ) rounded and convex, pronotal margins moderately broad; elytral margins moderately explanate. Head and pronotum greenish; labrum, ventral mouthparts and antennae blackish. Scutellum black. Elytra predominantly greenish, darker along suture, with strong metallic reflection. Punctures on pronotum 1.5–2.0 diameters apart, moderately coarse and deep; punctation on elytra slightly sparser and deeper, with punctures about as large as eye facets or slightly larger, 2.0–2.5 diameters apart. Ventral surface black.

Head flat medially, weakly punctate, covered with very short setae except clypeus sparsely covered with moderately long setae. Clypeus strongly emarginate anteriorly. Eyes ( Figure 5E View Figure 5 ) medium-sized, finely faceted, dorsally separated by about 3.0 times width of eye; interocular distance nearly 0.58 times head width; inner margins of eyes slightly rounded, convergent anteriorly. Maxilla with terminal palpomere ( Figure 5B View Figure 5 ) about 1.5 times longer than wide, outer margin about 1.8 times as long as inner, subparallel along basal half, weakly tapering apically. Labium with terminal palpomere ( Figure 5B View Figure 5 ) at base about 0.85 times as wide as penultimate at apex. Antenna ( Figure 5D View Figure 5 ) composed of nine antennomeres, antennomere 9 1.6 times as long as antennomere 8 and tapering to apex.

Prothorax about 0.85 times basal width of elytra; pronotal base bordered; pronotal hypomeron with fovea vestigial; prosternum smooth; prosternal process ( Figure 5B View Figure 5 ) truncate at apex, at middle about 0.16 times as wide as longer procoxal diameter; prosternum in front of coxae about 0.70 times as long as procoxal longitudinal diameter.

Mesoventral intercoxal process ( Figure 5C View Figure 5 ) about 0.50 times mesocoxal longest diameter, covered with very sparse short hair; meso-metaventral junction almost straight. Metaventrite ( Figure 5C View Figure 5 ) with complete discrimen; postcoxal lines weakly arcuate laterally, joined at middle. Elytral epipleuron ( Figure 5A View Figure 5 ) with maximum width at metaventrite, narrowing posteriorly but complete to apex, without foveae.

Legs moderately stout; mid and hind tibiae with strong triangular tooth ( Figure 5A,C View Figure 5 ); tarsal claw with distinct, subtriangular basal tooth.

Abdomen ( Figure 6A View Figure 6 ) with five ventrites in both sexes; postcoxal lines of first ventrite joined at middle, posteriorly almost reaching hind margin of ventrite I, incomplete laterally; ventrite I along midline about 2.3 times longer than ventrite II; ventrite V with apical margin weakly rounded in both sexes. Abdominal segment VIII ( Figure 6B,C View Figure 6 ) with sternite emarginate medially in male, rounded in female. Male genital segment as in Figure 6F View Figure 6 .

Male genitalia ( Figure 6E,H,I View Figure 6 ). Penis guide as long as parameres; apex of penis as in Figure 6H View Figure 6 .

Female genitalia ( Figure 6D,G View Figure 6 ). Coxites triangular; sperm duct consists of two parts of different diameter; spermatheca as in Figure 6D View Figure 6 with distinct gland. Infundibulum proper absent ( Figure 6G View Figure 6 ), but bursal appendix present in the form of a sclerotized spur.

Distribution

Papua New Guinea.

Etymology

This species is dedicated to the memory of Karl Popper who devoted his life to the study and development of the broad field of philosophy of science.

New records