Chilocorellus Miyatake, 1994

Zhang, Xiaoning, Liang, Xinyue, Chen, Xiaosheng & Wang, Xingmin, 2020, Three new species of the genus Chilocorellus Miyatake (Coleoptera, Coccinellidae, Sticholotidini) from the Philippines, ZooKeys 937, pp. 115-127 : 115

publication ID	https://dx.doi.org/10.3897/zookeys.937.50139
publication LSID	lsid:zoobank.org:pub:2E284E4E-50AD-43B9-8008-3F77FD10D60C
persistent identifier	https://treatment.plazi.org/id/78EDFD52-141E-5A14-BE89-82EDFE2EC1D6
treatment provided by	ZooKeys by Pensoft
scientific name	Chilocorellus Miyatake, 1994
status

Treatment

Genus Chilocorellus Miyatake, 1994

Type species.

Chilocorellus luzonicus Miyatake, 1994.

Diagnosis.

Chilocorellus is similar to Synonychimorpha Miyatake, 1994 in general appearance, with body rounded and glabrous; dorsal surface predominantly yellowish, elytral epipleuron broad (Fig. 1a-c View Figure 1 ); antenna with 11-antennomeres, long, antennal club distinctly 3-antennomeres, terminal antennomere elongate, and apically distinctly pointed (Fig. 1d, f View Figure 1 ). It can be distinguished from Synonychimorpha by its prosternal process in the form of an approximately ovoid prominence without carinae (Fig. 1l View Figure 1 ). In Synonychimorpha , prosternal process is square.

Description.

Body rounded, moderately to strongly convex, sub-hemispherical; dorsal surface apparently glabrous (Fig. 1a-c View Figure 1 ).

Head strongly hypognathous and small (Fig. 1c, d View Figure 1 ). Frons wide and flat with punctate (Fig. 1d View Figure 1 ). Clypeus short and transverse with anterior margin emarginate medially (Fig. 1e View Figure 1 ). Eyes large, coarsely faceted, inner eye canthus absent (Fig. 1c, d View Figure 1 ). Antennae with eleven antennomeres, scape and pedicel robust, scape elongate and curved near base, pedicel approximately as broad as scape; flagellum with nine antennomeres, antennomeres 3-5 slender, antennomeres 6-8 subequal in length and width; three terminal antennomeres comparatively wider than other antennomeres, forming a fusiform club with setae (Fig. 1d, f View Figure 1 ). Labrum transverse, rounded anteriorly and covered with long dense setae (Fig. 1g View Figure 1 ). Mandible subtriangular with two apical teeth, sharp and smooth; the two parts of mandibles asymmetrical, mola normal with two molar teeth on the left and one molar tooth on the right (Fig. 1h, i View Figure 1 ). Maxillary palp with four palpomeres, palpomere 1 small, palpomere 2 geniculate and at least two times as long as wide, palpomere 3 obviously short, terminal one slender and sharp, with strong obliquely truncated apex (Fig. 1j View Figure 1 ). Labial palp with three palpomeres, palpomere 1 tiny, palpomere 2 robust, terminal palpomere slender with setae, strongly conical, pointed apically; ligula membranous; insertion of labial palps visible ventrally on prementum; mentum trapezoidal, distinctly narrowed basally (Fig. 1k View Figure 1 ). Pronotum moderately transverse, broadly arcuate in both of frontal and lateral view, anterior margin emarginate; hind margin rounded; lateral margin rounded; not conspicuously angulate (Fig. 1a-c View Figure 1 ). Scutellar shield triangular (Fig. 1a, c View Figure 1 ). Elytra with prominent humeral angles, convex, anterior margin almost equal in width to hind margin of pronotum, lateral margins rounded, broadly explanate; dorsal surface glabrous, with dense and similar-sized punctation (Fig. 1a-c View Figure 1 ). Elytral epipleuron broad and gently complete apically, approximately 1/4 width of elytra. Hind wings well developed (Fig. 1a, b View Figure 1 ). Prosternum T-shaped, with golden pubescence and inconspicuous punctures; prosternal process significantly narrower than the transverse procoxa, prosternal carina absent; hypomeron broad without foveate (Fig. 1l View Figure 1 ). Meso- and metaventral processes broad, as wide as midcoxal diameter, with golden pubescence and inconspicuous punctures; metaventral postcoxal lines angled at the middle joint and complete (Fig. 1m View Figure 1 ). Metendosternite stalk distinctly shorter (0.5 or less) than broad, tendons widely separated and placed near apices of arms (Figs 1n View Figure 1 , 2n View Figure 2 , 3n View Figure 3 ). Legs robust with dense pubescence; pro and hind coxae transverse but mid coxae oval; trochanter sub-triangular, robust; femora thick, as long as tibia, but tibia slender, half as wide as femora; tarsi with four tarsomeres, tarsomere 3 minute, tarsomere 4 slender, longer than other tarsomeres; claws bidentate with two teeth (Fig. 1o-q View Figure 1 ). Abdomen with five ventrites; ventrite 1 slightly longer than ventrite 2, abdominal postcoxal lines incomplete, not recurved reaching the hind margin of ventrite 1; ventrites 2-4 sub-equal in length; ventrite 5 longer than ventrite 4, with hind margin rounded (Fig. 1r-1 View Figure 1 , s). Segment VIII, hind margin of male sternite emarginate and hind margin of female sternite rounded; tergite with hind margin rounded (Fig. 1r-1 View Figure 1 , s). Male terminalia, sternite IX and X sclerotized, with hind margin rounded (Fig. 1r View Figure 1 - 2 View Figure 2 ). Male genitalia: tegmen slender and symmetrical, basal piece membranous; tegminal strut T-shaped and widened apically; penis guide slender in ventral and lateral views, parameres slender, setose at apex. Penis slender and long, curved; penis capsule asymmetrical, inner arm developed, outer arm reduced; the front part and apex of penis tubular with teeth (Fig. 1t, u View Figure 1 ). Female genitalia: coxites triangular, setose apically; styli conspicuous (Fig. 1x View Figure 1 ).