﻿Revision of Aplosonyx Chevrolat, 1836 (Coleoptera, Chrysomelidae, Galerucinae) from China, with descriptions of three new species

﻿Abstract In this study, 21 species of the leaf-beetle genus Aplosonyx in China are described, including three new species, Aplosonyxancorellasp. nov., Aplosonyxnigricornissp. nov. and Aplosonyxwudangensissp. nov., and 1 new record, Aplosonyxduvivieri Jacoby, 1900. Additionally, Aplosonyxancorafulvescens Chen, 1964 is elevated to species. A key to the Chinese species of Aplosonyx is provided.


Introduction
The genus Aplosonyx was established by Chevrolat (1836). Galleruca albicornis (Wiedemann, 1821) was designated as type species by Duponchel and Chevrolat (1842). Although Gistel (1848) emended it to Haplosonyx, Aplosonyx is regarded as the valid name (Maulik 1936;Gressitt and Kimoto 1963;Kimoto 1989;Yang 1995   Diagnosis. This species differs from A. fulvescens Chen in the antennae with antennomeres 1-6 yellow and antennomeres 7-11 brown, pronotum and elytron densely covered with large punctures, and the aedeagus apex is distinctly pointed. However, the pronotum and elytron of A. fulvescens are sparsely covered with punctures, the antennae are brown with antennomeres 1-3 yellow, and the aedeagus is narrowed in the middle with its apex slightly pointed; in lateral view the apex is strongly bent. This species differs from A. ancorella sp. nov. in the abdomen having no black spots, and the interstices of punctures in the elytron not being wrinkled.
Redescription. Male. Length 9.8-12.6 mm, width 5.8-6.6 mm. Head, pronotum, abdomen, and leg orange, elytra orange or reddish brown, antennae with antennomeres 1-6 yellow and antennomeres 7-11 brown, scutellum black, ventral surface of the thorax black with yellow middle, pronotum with single purple or black spot at base, elytron with a broad purplish band from anterior to middle, extending forward along suture and expanding again on base.
Pronotum approximately 2 × as wide as long, lateral border margined, widest at anterior 1/3; disc with transverse furrow, densely covered with large punctures, the interstices of punctures slightly narrower than diameter of punctures, with sparse small punctures in base and apex area of pronotum.
Scutellum triangular, finely covered with punctures. Elytra wider than pronotum, 0.8 × as long as body, 1.6 × as long as wide, epipleura basally widened, dorsal surface slightly convex, irregularly covered with large and deep punctures, the interstices of punctures narrower than diameter of punctures and lightly covered with small punctures in interstices.
Female. Length 9.6-13.2 mm, width 5.6-6.7 mm. Antennae slightly thinner than in male, antennomere 2 shortest, antennomere 3 approximately 2.5 × as long as second; antennomere 4 longest, 1.2 × as long as antennomeres 2 and 3 combined; apical sternite without incisions. Diagnosis. This species can be distinguished from other Chinese species by the yellow antennae with black antennomeres 5-8, the apex of the pronotum with four raised areas, and blue or purplish blue elytra. This species differs from A. sublaevicollis in pronotum being widest at anterior 1/3. Redescription. Male. Length 12.2-14.0 mm, width 6.8-7.4 mm. Head, pronotum, scutellum, and ventral surface of body yellow, antennae yellow with antennomeres 5-8 black, legs black with femur yellow, elytra blue or purplish blue.
Vertex covered with several large punctures; Interocular space 2.6 × as wide as transverse diameter of eye. Interantennal space 1.9 × as wide as transverse diameter of antennal socket. Frontal tubercles transverse, distinctly raised, each separated by a deep furrow; antennae slender, extended to the middle of the elytra, 0.65 × as long as body; antennomeres 1-3 shiny; antennomeres 4-11 covered with pubescence, antennomere 2 shortest, antennomere 3 twice as long as second; antennomere 4 longest, slightly longer than antennomeres 2 and 3 combined; antennomeres 5-10 gradually shortened, shorter than antennomere 4; antennomere 11 slightly longer than antennomere 10, pointed.  Pronotum approximately 1.6 × as wide as long, lateral border margined, widest at anterior 1/3, apex of disc with four raised areas, middle of disc with deep transverse furrow; closely covered with large punctures in furrow and with sparsely small punctures in other parts of pronotum.
Scutellum triangular, finely covered with punctures. Elytra wider than pronotum, 0.75 × as long as body, 1.9 × as long as wide, with lateral margins straight and subparallel, epipleura basally widened, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, irregularly covered with large punctures, the interstices of punctures wider than diameter of individual punctures, approximately 2 × as wide as diameter of punctures and lightly covered with small punctures in interstices.
Aedeagus slender, parallel-sided, basally widened, apex slightly pointed, in lateral view base and apex slightly bent.
Antennae slightly thinner than in male, antennomere 2 shortest, antennomere 3 approximately 1.5 × as long as second; antennomere 4 longest, 1.4 × as long as antennomeres 2 and 3 combined; apical sternite without incisions.  Diagnosis. This species can be distinguished from other congeners by the black pronotum and elytra, all margins of pronotum and elytra yellow, including the yellow suture. This species differs from A. orientalis in the color of the body, the slender aedeagus, and in lateral view the apex is strongly bent.
Redescription. Male. Length 9.0-10.2 mm, width 5.0-6.0 mm. Head and abdomen yellow, antennae and ventral surface of thorax black, elytra black with all margins yellow, including the suture of elytra; scutellum black with apex yellow; femur and tibia outside black inside yellow, tarsus and claws brown.
Pronotum 2 × as wide as long, lateral border margined, widest at posterior corners, disc with deep transverse furrow, less distinct in middle; closely covered with large punctures in furrow and with sparsely small punctures in other parts of pronotum.
Scutellum triangular, finely covered with punctures. Elytra wider than pronotum, 0.75 × as long as body, 1.6 × as long as wide, epipleura wide at anterior 1/4, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, irregularly covered with punctures, the interstices of punctures lightly wider than diameter of individual punctures and covered with small punctures in the interstices.
Aedeagus slender, parallel-sided, slightly narrowed in middle, strongly narrowing in apical tenth, ending in pointed apex, in lateral view apex strongly bent.
Distribution. China: Yunnan.  Diagnosis. This species can be distinguished from other Chinese species by yellow body, antennae, legs, labrum, and mandible black, and dense punctures on the elytra. This species differs from A. flavipennis in the head, pronotum, scutellum, and ventral surface of the thorax all being yellow.
Pronotum approximately 2 × as wide as long, lateral border margined, widest at posterior corners; disc with deep transverse furrow, covered with large punctures in furrow and with sparsely small punctures in other parts of pronotum.
Scutellum triangular, covered with fine punctures. Elytra wider than pronotum, 0.7 × as long as body, 1.65 × as long as wide, with lateral margins straight and almost parallel, epipleura wide at anterior 1/4, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, regularly covered with large deep punctures, the interstices of punctures narrower than diameter of punctures, and covered with small punctures in interstices.
Female. Length 9.4 mm, width 4.7 mm. Antennae slightly thinner than in male, antennomere 2 shortest, antennomere 3 twice as long as second; antennomere 4 longest, 1.7 × as long as antennomeres 2 and 3 combined; apical sternite without incisions.  Diagnosis. This species can be distinguished from other Chinese species by the dark bluish green color of the head, pronotum, and elytra.
Pronotum approximately 1.6 × as wide as long, lateral border margined, widest at anterior 1/3, disc with transverse furrow, finely covered with punctures, only with several large punctures in furrow.
Scutellum triangular, smooth, impunctate. Elytra wider than pronotum, 0.8 × as long as body, 1.65 × as long as wide, epipleura wide at anterior 1/3, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, regularly covered with punctures, partially arranged in ten rows in each elytron, interstices between punctures approximately 3.5 × as wide as diameter of individual punctures and lightly covered with small punctures.
Aedeagus slender, parallel-sided, basally widened, middle narrowed, apex pointed, in lateral view base and apex slightly bent.
Female. Length 4.4-5.0 mm, width 2.5-3.0 mm. Antennae slightly thinner than in male, antennomere 2 shortest, antennomere 3 Diagnosis. This species can be distinguished from other Chinese species by its black head and pronotum, and the elytra without any spots. This species differs from A. duvivieri in the color of the head, pronotum, scutellum, and ventral surface of thorax being black.
Pronotum approximately 1.8 × as wide as long, lateral border margined, widest at posterior corners; disc with deep transverse furrow, closely covered with large punctures in furrow and sparsely with small punctures in other parts of pronotum, the interstices of punctures equal to diameter of individual punctures in furrow, and smooth, impunctate in middle of furrow.
Scutellum triangular, finely covered with punctures. Elytra: wider than pronotum, 0.8 × as long as body, 1.7 × as long as wide, epipleura moderately wide at anterior 1/4, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, regularly covered with large and deep punctures, partially arranged in twenty rows in each elytron, the interstices between punctures wider than the diameter of individual punctures, approximately 2 × as wide as diameter of punctures and lightly covered with small punctures in the interstices.
Aedeagus slender, parallel-sided, basally widened, narrowed in middle, apex distinctly pointed, in lateral view base and apex distinctly bent.
Distribution. China: Yunnan. Diagnosis. Chen (1964) described the subspecies Aplosonyx ancora fulvescens from three specimens collected in Hainan and Fujian. Examination of the type specimen and the additional seven specimens revealed that this subspecies differs from Aplosonyx ancora in antennae with antennomeres 1-3 yellow and antennomeres 4-11 brown, the pronotum and elytra sparsely covered with small punctures, the apex of the aedeagus slightly pointed,  in lateral view apex is bent, the base is wide, and it gradually narrows to the apex. The pronotum and elytra of Aplosonyx ancora are densely covered with punctures, the antennomeres 1-6 yellow, the aedeagus apex is distinctly pointed. Because these differences are constant among the specimens examined, we elevate the subspecies fulvescens to species level. This species is also similar to Aplosonyx ancorella sp. nov., which differs in the antennae with antennomeres 1-7 yellow and antennomeres 8-11 brown, the abdomen with five pairs of black spots, and the pronotum and elytra densely covered with large punctures.
Head, pronotum, abdomen and leg yellow, elytra reddish brown, antennae brown with antennomeres 1-3 yellow, scutellum black, ventral surface of thorax black with yellow middle, pronotum with 1 small black spot in base, elytra with a broad purplish band from anterior to middle, which extends forward along suture and expends again on base.
Pronotum approximately 2 × as wide as long, lateral border margined, widest at posterior corners, disc with transverse furrow, sparsely covered with several large punctures, the interstices of punctures equal to diameter of individual punctures.
Scutellum triangular, finely covered with punctures. Elytra wider than pronotum, 0.78 × as long as body, 1.65 × as long as wide, epipleura wide at anterior 1/4, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, irregularly covered with punctures, the interstices of punctures equal to diameter of individual punctures and lightly covered with small punctures in the interstices.
Aplosonyx gancuicus (Chen, 1942 Diagnosis. This species can be distinguished from other species by the elytra with a broad black band at the side, which extends along the lateral margin of each elytron, and three black spots on each side of the suture.
Redescription. Male. Length 6.1 mm, width 3.6 mm. Head, antennae, pronotum, scutellum, legs, and ventral surface of body black, elytra yellow, each elytron with a broad black band and three black spots.
Scutellum triangular, finely covered with punctures. Elytra: wider than pronotum, 0.7 × as long as body, 1.6 × as long as wide, epipleura moderately wide at anterior 1/3, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, covered with large deep punctures, partially arranged in ten rows in each elytron, the interstices between punctures wider than diameter of individual punctures, approximately 2 × as wide as the diameter of individual punctures and lightly covered with small punctures in interstices.
Distribution. China: Gansu.  Diagnosis. This species can be distinguished from other species by its black pronotum, and each elytron with five black spots: one at the base near the scutellum, a pair in the middle, and apically two spots which are connected. This species differs from A. omeiensis in having a black head and pronotum, the abdomen yellowish brown, and the shape of the spots on the elytra.

Aplosonyx nigriceps
Redescription. Male. Length 4.5-5.0 mm, width 2.7-3.2 mm. Head, pronotum and scutellum black, antennae, ventral surface of the thorax and legs brown, abdomen yellowish brown, elytra yellow, each elytron with five black spots, one at base near scutellum, a pair in the middle, and a pair of apical spots which are connected.
Pronotum 1.9 × as wide as long, lateral border margined, widest at anterior 1/3; disc with deep transverse furrow, less distinct in middle; closely covered with large punctures in furrow and with sparsely small punctures in other parts of pronotum.
Scutellum triangular, finely covered with punctures. Elytra: wider than pronotum, 0.7 × as long as body, 1.5 × as long as wide, epipleura wide at anterior 1/3, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, regularly covered with large and deep punctures, partially arranged in ten rows in each elytron, the interstices between punctures wider than diameter of individual punctures, approximately 2.5 × as wide as the diameter of individual punctures and lightly covered with small punctures in interstices.
Distribution. China: Hubei, Sichuan. Elytra wider than pronotum, 0.7 × as long as body, 1.6 × as long as wide, epipleura wide at anterior 1/3, posteriorly gradually narrowing towards apex; dorsal surface slightly convex, covered with punctures in irregular rows, the interstices 2 × as wide as diameter of punctures and slightly covered with fine punctuation.
Distribution. China: Sichuan.  Diagnosis. This species can be distinguished from other species by the antennae with first antennomere yellow, and antennomeres 2-11 black; the legs are black with yellow femurs. This species differs from A. cinctus in having the aedeagus widened towards middle, in lateral view moderately bent. Redescription. Male. Length 9.5-10.4 mm, width 5.0-5.8 mm. Head, pronotum, elytra, scutellum, and abdomen yellow; antennae black with first antennomere yellow; ventral surface of thorax black and in middle area yellow; legs black with femur, inner sides of tibiae, coxae and trochanters are yellow.
Pronotum approximately 2 × as wide as long, lateral border margined, widest at posterior corners; disc with deep transverse furrow, closely covered with large punctures in furrow and with sparse small punctures in other parts of pronotum, in furrow the interstices between the punctures equal to diameter of individual punctures.
Scutellum triangular, finely covered with punctures. Elytra: wider than pronotum, 0.75 × as long as body, 1.55 × as long as wide, epipleura wide at anterior 1/4, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, regularly covered with large and deep punctures, partially arranged in twenty rows in each elytron, the interstices of the punctures in rows approximately 2 × as wide as diameter of punctures and slightly covered with fine punctuation.
Aedeagus gradually widening from base to middle, gradually narrowing from middle towards apex, at one tenth from apex strongly narrowing, ending in a pointed apex. in lateral view moderately bent, with distinctly bent apex.
Distribution. China: Guangdong, Guangxi, Yunnan; Vietnam, Laos, Thailand, Myanmar, India. Diagnosis. This species can be distinguished from the other species by its black pronotum and yellow elytra with a broad blackish band in the middle, which extends along the suture and onto the base.
Redescription. Male. Length 4.6-5.4 mm, width 3.0-3.4 mm. Head, antennae, pronotum, scutellum ventral surface of body black or brown; elytra yellow with a broad blackish band in middle, which extends along suture and expends on base.
Pronotum approximately 1.5 × as wide as long, lateral border margined, widest at posterior corners; disc with deep transverse furrow, sparsely covered with large punctures in furrow.
Scutellum triangular, finely covered with punctures.  Elytra wider than pronotum, 0.75 × as long as body, 1.8 × as long as wide, epipleura wide at anterior 1/3, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, regularly covered with large and deep punctures, partially arranged in ten rows in each elytron, the interstices between punctures wider than diameter of individual punctures, 2 × as wide as the diameter of individual punctures and lightly covered with small punctures in interstices.
Female. Length 4.8-5.5 mm, width 2.8-3.2 mm. Antennae slightly thinner than in male, antennomere 2 shortest, antennomere 3 longer than antennomere 2, twice as long as second; antennomere 4 longest, 1.6 × as long as antennomeres 2 and 3 combined; apical sternite without incisions. Diagnosis. This species can be distinguished from other species by each elytron with two longitudinal black stripes, and the apex with one black spot. This species differs from A. tianpingshanensis in the aedeagus apex being distinctly pointed; in lateral view the apex is moderately bent.
Redescription. Male. Length 4.6-4.9 mm, width 2.5-3.0 mm.  Head, antennae, pronotum, elytra and leg yellow, vertex, scutellum, and ventral surface of the body black, pronotum with a black spot in middle, each elytron with two longitudinal black stripes, and apex with one black spot.
Pronotum 1.8 × as wide as long, lateral border margined, widest at posterior corners; disc with deep transverse furrow, covered with closely large punctures in furrow and with sparsely small punctures in other parts of pronotum.
Scutellum triangular, with rounded apex, smooth, impunctate. Elytra: wider than pronotum, 0.75 × as long as body, 1.65 × as long as wide, epipleura wide at anterior 1/3, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, regularly covered with large and deep punctures, partially arranged in ten rows in each elytron, the interstices of punctures in rows wider than diameter of punctures, approximately 2 × as wide as diameter of punctures and lightly covered with small punctures in interstices.
Distribution. China: Gansu, Shaanxi.  Diagnosis. This species can be distinguished from other species by the yellow body, black legs, and yellow antennae with the apical two or three antennomeres black.
Pronotum approximately 2 × as wide as long, lateral border margined, widest at posterior corners; disc with deep transverse furrow, closely covered with large punctures in furrow and sparsely with small punctures in other parts of pronotum, the interstices of punctures equal to diameter of individual punctures in furrow, smooth and impunctate in middle of furrow.
Scutellum triangular, finely covered with punctures. Elytra: wider than pronotum, 0.8 × as long as body, 1.7 × as long as wide, epipleura wide at anterior 1/4, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, regularly covered with large and deep punctures, partially arranged in twenty rows in each elytron, the interstices of punctures wider than diameter of individual punctures, approximately 2 × as wide as diameter of punctures and lightly covered with small punctures in interstices.
Aedeagus slender, parallel-sided, basally widened, apex distinctly pointed, in lateral view base and apex moderately bent.
Variability. The syntype studied has different coloration, antennae with antennomeres 1-3 yellow, ventral surface of the body, coxae, and trochanters yellow.
Distribution. China: Yunnan; Thailand, Myanmar, Malaysia, Indonesia. Diagnosis. This species can be distinguished from other species by its black head and pronotum, and the reddish brown elytra without any spots.
Pronotum 1.8 × as wide as long, lateral border margined, widest at posterior corners; disc with deep transverse furrow, less distinct, smooth and impunctate in middle; covered with several large punctures in furrow and with sparsely small punctures in other parts of pronotum. Scutellum triangular, finely covered with punctures. Elytra: wider than pronotum, 0.75 × as long as body, 1.65 × as long as wide, epipleura wide at anterior 1/4, posteriorly gradually narrowing towards apex, dorsal surface convex slightly, covered with large punctures regularly, partially arranged in ten rows in each elytron, the interstices of punctures wider than diameter of punctures, approximately 2 × as wide as diameter of punctures, covered with small punctures. Metasternum 2 × as long as the mesosternum. Ventral surface of abdomen with five ventrites, ventrite 1 longest, ventrites 2-4 gradually shortened, apical ventrite slightly longer than ventrite 3, with two subtriangular incisions.
Aedeagus slender, parallel-sided, basally widened, narrowed in middle, apex round with slightly pointed, in lateral view base and apex slightly bent.

Aplosonyx sublaevicollis
Pronotum approximately 2 × as wide as long, lateral border margined, widest at posterior corners; middle of disc with transverse furrow; closely covered with large punctures in furrow and with sparsely small punctures in other parts of pronotum.
Scutellum triangular, smooth, impunctate. Elytra: wider than pronotum, 0.8 × as long as body, 1.7 × as long as wide, epipleura wide at anterior 1/4, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, irregularly covered with large punctures, the interstices of punctures wider than diameter of individual punctures, approximately 2 × as wide as diameter of individual punctures and lightly covered with small punctures in interstices.
Aedeagus slender, parallel-sided, basally widened, narrowed in middle, apex distinctly pointed, in lateral view base and apex distinctly bent.
Female. Length 8.8-10.6 mm, width 4.6-5.4 mm. Antennae slightly thinner than in male, antennomere 2 shortest, antennomere 3 approximately 1.5 × as long as second; antennomere 4 longest, 1.5 × as long as antennomeres 2 and 3 combined; apical sternite without incisions. Diagnosis. This species can be distinguished from the other Chinese species by each elytron having two broad longitudinal black stripes, and the apex with two black spots. This species differs from A. pictus in the aedeagus being slightly narrowed in the middle, and the apex widened.
Redescription. Male. Length 5.0-5.3 mm, width 3.0-3.2 mm. Head, antennae, pronotum, elytra and legs yellow, vertex, scutellum and ventral surface of the body black, margin and apex of abdominal ventrite yellow, pronotum with a black spot in middle, each elytron with two longitudinal black stripes, and apex with one pair of black spots.
Pronotum approximately 1.8 × as wide as long, lateral border margined, widest at posterior corners; disc with deep transverse furrow, covered with several punctures in furrow and with sparsely small punctures in anterior angle.
Scutellum triangular, smooth, impunctate. Elytra: wider than pronotum, 0.75 × as long as body, 1.75 × as long as wide, epipleura wide at anterior 1/3, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, regularly covered with large and deep punctures, partially arranged in ten rows in each elytron, the interstices of punctures wider than diameter of punctures, approximately 2 × as wide as diameter of punctures and lightly covered with small punctures in interstices.
Distribution. China: Gansu, Shaanxi, Hunan, Hubei, Guizhou.  Diagnosis. This species can be distinguished from other Chinese species by each elytron having five black spots, the pronotum with three obvious black spots. This species differs from A. omeiensis in the aedeagus being slightly widened at the middle, and the base expanded into a fan shape.
Head, antennae, pronotum, elytra, and leg yellow; vertex, scutellum, and ventral surface of the body black, apical ventrite of abdomen yellow, pronotum with three black spots, one large black spot in the middle, and one small black spot on each side; each elytron with five black spots, middle and apex with one pair of spots and base with one spot.
Pronotum approximately 2 × as wide as long, lateral border margined, widest at posterior corner; disc with transverse furrow, less distinct in middle; sparsely covered with several large punctures in furrow.
Scutellum triangular, finely covered with punctures. Elytra: wider than pronotum, 0.78 × as long as body, 1.7 × as long as wide, epipleura wide at anterior 1/3, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, regularly covered with large and deep punctures, partially arranged in ten rows on each elytron, the interstices of punctures 2 × as wide as diameter of punctures and lightly covered with small punctures.
Aedeagus slender, slightly widened at middle, basally enlarged in a fan shape, apex pointed, in lateral view slightly bent.

Diagnosis.
The new species closely resembles A. ancora and A. fulvescens. In A. ancora, the antennae with antennomeres 1-7 yellow and antennomeres 8-11 brown, abdomen with five pairs of black spots, the pronotum and elytra densely covered with large punctures, and the interstices of the punctures in the elytra are somewhat wrinkled. In A. fulvescens, the antennae with antennomeres 1-3 yellow and antennomeres 4-11 brown, the pronotum and elytra are sparsely covered with small punctures.
Description. Male. Length 10.8-12.0 mm, width 5.8-6.2 mm. Head, pronotum, abdomen and leg yellow, elytra reddish brown, antennae with antennomeres 1-7 yellow and antennomeres 8-11 brown, scutellum black, ventral surface of thorax black with yellow middle, pronotum purple or black, with lateral margin and anterior margin yellow, elytra with a broad purplish band from anterior to middle, which extends forward along suture and expends again on base, abdomen with five pair of black spots at side on each visible sternites.
Vertex finely and sparsely covered with punctures. Interocular space 1.9 × as wide as transverse diameter of eye. Interantennal space 1.3 × as wide as transverse diameter of antennal socket. Frontal tubercles transverse, each separated by a deep furrow; antennae slender, 0.7 × as long as body; antennomeres 1-3 shiny; antennomeres 4-11 with short hairs, antennomere 2 shortest, antennomere 3 approximately 1.5 × as long as second; antennomere 4 longest, approximately 2 × as long as antennomeres 2 and 3 combined; antennomeres 5-10 gradually shortened, shorter than antennomere 4; antennomere 11 slightly longer than antennomere 10, pointed. Pronotum approximately 2 × as wide as long, disc with transverse furrow, densely covered with large punctures, the interstices of punctures distinctly narrower than diameter of punctures and with sparsely small punctures in apex of pronotum.
Scutellum triangular, finely covered with punctures. Elytra: wider than pronotum, 0.7 × as long as body, 1.5 × as long as wide, epipleura wide at anterior 1/4, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, irregularly covered with large and deep punctures, the interstices of punctures narrower than diameter of punctures and lightly covered with small punctures in interstices. their interstices somewhat wrinkled.
Etymology. The name refers to the similarity with Aplosonyx ancora. Diagnosis. The new species closely resembles A. nigriceps but differs due to each elytron with five black spots in A. nigriceps; in this new species each elytron has six black spots, and the aedeagus apex is rounded.
Description. Male. Length 5.0 mm, width 3.2 mm. Head, antennae, pronotum, scutellum, ventral surface of thorax, abdomen, and legs black, elytra yellow, each elytron with six black spots, base, middle and apex with one pair of spots.
Pronotum 2 × as wide as long, lateral border margined, widest at anterior 1/3; disc with transverse furrow, less distinct in middle; covered with several large punctures in furrow and with sparsely small punctures in other parts of pronotum. Scutellum triangular, only on base sparsely covered with small punctures. Elytra wider than pronotum, 0.7 × as long as body, 1.65 × as long as wide, epipleura wide at anterior 1/3, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, regularly covered with large punctures, partially arranged in ten rows in each elytron, the interstices of punctures in rows approximately 2.5 × as wide as the diameter of punctures and lightly covered with small punctures in interstices.
Etymology. The species name refers to the black antennal color. Diagnosis. The new species closely resembles A. yunlongensis in spots of elytra, but the pronotum of A. yunlongensis has three obvious black spots. The new species is different in that the black spots on both sides of pronotum are small and almost invisible. The new species also closely resembles A. tianpingshanensis in the aedeagus, where the apex is wide and flat in A. tianpingshanensis, while the new species is round and slightly pointed. The interstices of punctures on elytra of new species are narrower than that on the elytra of A. yunlongensis and A. tianpingshanensis.
Description. Male. Length 5.0 mm, width 3.1 mm. Head, antennae, pronotum, elytra and leg yellow, vertex, scutellum, and ventral surface of the body black, apical ventrite of abdomen yellow, pronotum with a black spot in middle, the black spots on both sides are small and almost invisible. each elytron with five black spots, middle and apex with one pair of spots and base with one spot.
Pronotum approximately 1.8 × as wide as long, lateral border margined, widest at anterior 1/3; disc with transverse furrow, the punctures are evenly distributed on the disc. Scutellum triangular, smooth, impunctate.
Elytra: wider than pronotum, 0.8 × as long as body, 1.6 × as long as wide, epipleura wide at anterior 1/3, posteriorly gradually narrowing towards apex, dorsal surface slightly convex, regularly covered with large and deep punctures, partially arranged in ten rows in each elytron, the interstices of punctures lightly wider than diameter of individual punctures and covered with small punctures in the interstices.
Etymology. This new species was named after the type locality. Distribution. China: Hubei.