Oroides, Tomaszewska, Wioletta & Ślipiński, Adam, 2012

Tomaszewska, Wioletta & Ślipiński, Adam, 2012, Oroides pakaluki new genus and new species of Coccidulini from New Guinea (Coleoptera: Coccinellidae), Zootaxa 3174, pp. 44-50 : 45-48

Oroides gen. nov.

(Figs. 1–4)

Type species. Oroides pakaluki sp. nov.

Etymology. The generic name is derived from the Oro (Northern) Province of Papua New Guinea where the beetle was found. Gender masculine.

Diagnosis. Oroides differs from all known Coccinellidae in the corylophid-like body, short and strongly

heteromeroid trochanters, broad and flattened femora receiving narrow tibiae in dorsal grooves, procoxal cavities

circular with very long and narrow slits and antennal scape bearing large sensory areas. Description. Body (Figs. 1, 2A) broadly oval, weakly convex with anterior margin of pronotum arcuate and

entirely covering head from above; body resembling an oversized Corylophus Stephens (Corylophidae) ; fully

winged.

Head ( Fig. 2 E) 0.75 times as long as wide;

subantennal grooves absent. Eyes large, moderately

coarsely facetted, dorsally about 0.5 times length of

head capsule, not emarginate, with inner orbits

arcuate or weakly converging towards vertex;

interfacetal setae absent. Antennal insertions

somewhat frontal, not visible from above. Antenna

( Fig. 3 A) 11-segmented; scape 2.4 times as long as

pedicel, asymmetrically produced externally with a

few large pits along outer edge ( Fig. 3 B); pedicel

asymmetrical, distinctly narrower than scape, 0.7

times as long as wide; antennomere 3 distinctly

broadening towards apex, 1.6 times longer than

wide, and about 1.5 times as long as 4; antennomere

4 about 0.75 times as long as 5; antennomeres 3 and

4 glabrous, without punctation or microsculpture;

antennomeres 6 and 7 strongly transverse. Antennal

club asymmetrical, 4-segmented, compact with

large sensory areas. Anterior clypeal margin

arcuate; labrum large, shallowly emarginate.

Mandible ( Figs. 3 D, 3E) with single apical tooth;

prostheca large, shortly setose; mola reduced and

weakly sclerotized, without molar tooth. Maxillary

cardo weakly transverse; galea small ( Fig. 3 F),

rounded with tuft of stiff apical setae; lacinia

vestigial; terminal palpomere as long as wide,

weakly expanded toward apex, obliquely truncate

apically ( Fig. 3 F). Mentum transverse, about 1.6

times broader than long; anterior margin emarginate FIGURE 1. Oroides pakaluki sp. nov., habitus.

medially; ventral surface smooth, moderately coarsely punctate and sparsely setose latero-apically; prementum nearly as long as broad; ligula parallel-sided; labial palps separated by distance about equal to width of palpiger; apical palpomere longer and as broad as penultimate one; submentum distinct.

Pronotum ( Fig. 2 F) arcuate anteriorly, covering head from above; anterior and lateral edges not margined; hind edge sinuate with distinct marginal line; hind angles weakly prominent posteriorly and acute. Prothoracic hypomeron ( Fig. 2 D) deeply concave posteriorly, receiving fore femora; notosternal suture distinct. Prosternal process moderately broad, rounded apically, reaching far behind coxae and widening from mid length of coxa towards apex; surface smooth. Prosternum arcuate; anterior margin simple with complete bordering line; procoxal cavity oval, with very long and narrow slit between prosternum and hypomeron.

Mesovenrite ( Fig. 3 C) deeply concave anteriorly, receiving apex of prosternal process; meso-metaventral process about as broad as corresponding coxal diameter; articulation arcuate anteriorly with suture well visible; without internal knob.

Scutellum triangular, weakly transverse; surface punctate and setose. Elytra ( Fig. 2 A) with lateral margins very narrow, visible from above for half of their length; surfaces ( Fig. 2 C) finely, irregularly and moderately densely punctate and setose; elytral epipleuron oblique; broad anteriorly, obsolete in apical third; without foveae for receptions of legs, ( Fig. 2 B).

Metaventrite large; metaventral postcoxal lines shallow, joined medially, complete, arcuate but posteriorly angled apically; postero-lateral parts of metaventrite, metaepimera and hind coxa deeply concave receiving hind femora in repose ( Fig. 3 H); metendosternite stalk nearly as long as broad; tendons separated by about half width of stalk and placed on laminae.

Legs short and stout, flattened; trochanters long oval; trochantero-femoral attachment strongly oblique ( Figs. 2 B, 3C); femora large, oval with deep grooves nearly throughout for receiving tibiae; tibiae subcylindrical, narrowing gradually towards their apices; hind tibia with short double spurs weakly visible among stout spines surrounding tibial apex; tarsi short and slender, 4-segmented; pretarsal claws appendiculate.

Abdomen ( Fig. 3 H) with 6 ventrites; ventrites 1 and 2 solidly fused with trace of suture laterally, and combined 1.3 times longer than 3–6; abdominal postcoxal lines separate medially, Diomus - type, incomplete, extending down from base and running parallel to and near hind margin of ventrite 1; ventrite 5 smooth and simply setose, with hind margin rounded; hind margin of male ventrite 6 weakly emarginate ( Fig. 3 G), tergite VIII rounded. Sternite IX with central part membranous; apodeme of male sternum IX rod like ( Fig. 4 D).

Male genitalia ( Figs. 4 A–C). Parameres articulated with phallobase, well developed, simple and separated, slightly shorter than penis guide, densely setose along at least half of their length; penis guide simple with lateral sides symmetrical; tegminal strut simple. Penis arcuate with base with both arms equally developed and apex spirally pointed.

Female unknown.

Figures

FIGURE 2. Oroides pakaluki sp. nov.; A) body, dorsal view; B) body, ventral view; C) elytra, detail of sculpture; D) prothorax, ventral; E) head, ventral; F) pronotum.

FIGURE 3. Oroides pakaluki sp. nov.; A) antenna; B) antennal scape; C) prosternal process and meso-metaventral junction; D) mandible, dorsal; E) mandible, inner view; F) maxilla, ventral; G) abdominal apex; H) abdomen.

FIGURE 4. Oroides pakaluki sp. nov.: A) male genitalia, ventral; B) penis; C) tegmen, inner view; D) male terminalia.