Pectapalochrus omega (Evers, 1965)

Tong, Junbo, Tshernyshev, Sergei E., Liu, Haoyu & Yang, Yuxia, 2023, First record of the genus Pectapalochrus Tshernyshev, 2016 (Coleoptera, Malachiidae) from China, Biodiversity Data Journal 11, pp. 104877-104877 : 104877

publication ID	https://dx.doi.org/10.3897/BDJ.11.e104877
persistent identifier	https://treatment.plazi.org/id/895E6F47-4005-58D0-95A6-61BAAE7A572D
treatment provided by	Biodiversity Data Journal by Pensoft
scientific name	Pectapalochrus omega (Evers, 1965)
status

Treatment

Pectapalochrus Pectapalochrus omega Apalochrus omega Evers, 1965 - Evers 1965: 149 (type locality: Mongolia).

Pectapalochrus Pectapalochrus omega Flabellapalochrus omega (Evers, 1965): Evers, 1987 - Evers 1987: 59.

Pectapalochrus Pectapalochrus omega Dromanthomorphus omega (Evers, 1965): Wittmer, 1990 - Wittmer 1990: 112; Mayor, 2007 - Mayor 2007: 416.

Pectapalochrus Pectapalochrus omega Pectapalochrus omega (Evers, 1965): Tshernyshev, 2016 - Tshernyshev 2016a: 351.

Pectapalochrus Pectapalochrus omega Apalochrus boops Evers, 1968 - Evers 1968: 33. Synonymized by Evers 1969: 188.

Materials

Type status: Other material. Occurrence: recordedBy: Guodong Ren; individualCount: 3; sex: 1 male, 2 females; lifeStage: adult; occurrenceID: FC88DCF7-9E42-5A67-8D3C-E8A8250B640F; Location: country: China; stateProvince: Ningxia; county: Zhongwei; municipality: Shapotou ; Event : year: 1987; month: 6; day: 8; Record Level : institutionID: Museum of Hebei University ; institutionCode: MHBU Type status: Other material. Occurrence: recordedBy: Guodong Ren; individualCount: 1; sex: 1 male; lifeStage: adult; occurrenceID: ECC90ED4-65B2-5B5E-8A71-FA2142F862B8; Location: country: China; stateProvince: Ningxia; county: Zhongwei; locality: Gantang , Shapotou ; Event : year: 1987; month: 6; Record Level : institutionID: Museum of Hebei University ; institutionCode: MHBU Type status: Other material. Occurrence: recordedBy: Kang Lou; individualCount: 2; sex: 2 female; lifeStage: adult; occurrenceID: F444DB70-F6B2-5201-ACEA-6C3381451A88; Location : country: China; stateProvince: Ningxia; county: Yanchi ; locality: Qingyangjing ; verbatimElevation: 1469; verbatimLatitude: 37.96°N; verbatimLongitude: 107.18°E; Event : year: 2017; month: 5; day: 19; Record Level : institutionID: Museum of Hebei University ; institutionCode: MHBU Type status: Other material. Occurrence: recordedBy: Kang Lou; individualCount: 1; sex: 1 female; lifeStage: adult; occurrenceID: 5CE8568D-3B16-5F49-8558-C1810667F443; Location : country: China; stateProvince: Ningxia; county: Yanchi ; locality: Xijingtan ; verbatimElevation: 1343; verbatimLatitude: 37.87°N; verbatimLongitude: 107.57°E; Event : year: 2017; month: 5; day: 27; Record Level : institutionID: Museum of Hebei University ; institutionCode: MHBU Type status: Other material. Occurrence: recordedBy: Kang Lou; individualCount: 1; sex: 1 male; lifeStage: adult; occurrenceID: 2625194C-EB6B-5C7A-BE4F-B1021003ED0C; Location : country: China; stateProvince: Ningxia; county: Yanchi ; locality: Zhouzhuangzi ; verbatimElevation: 1452; verbatimLatitude: 37.74°N; verbatimLongitude: 107.36°E; Event : year: 2017; month: 6; day: 10; Record Level : institutionID: Museum of Hebei University ; institutionCode: MHBU GoogleMaps GoogleMaps GoogleMaps GoogleMaps GoogleMaps GoogleMaps

Description

Male. Length of body 3.5-4.7 mm, width at widest part of elytra 1.5-2.3 mm and at the base of elytra 1.2-1.6 mm.

Head capsule black. Antennae yellow to black: antennomere 1 yellow with a dark spot on inner side; 2 entirely yellow; 3-8 yellow to black; 9-11 entirely black. Mouthparts black. Pronotum black. Elytron with variable black and yellow markings, from black with a small yellow spot near apex to yellow with two black stripes at humerus and apical third. Scutellar shield black. Legs yellow to black (Fig. 1 View Figure 1 a). Ventral surface black. Vesicles yellow. Dorsum with double pubescence consisting of adpressed pubescence and sparse white stiff bristles. Sculptures evenly punctuated, stronger on elytra than on other parts.

Head almost as wide as pronotum (Fig. 1 View Figure 1 a). Frons flat, interocular area not depressed and lacking protuberances (Fig. 2 View Figure 2 a). Antennae long and flabellate, projecting beyond middle of elytra; antennomere 1 widened and club-shaped; 2 small and almost completely hidden by 1; 3 enlarged, right triangular; 4-10 serrate to flabellate and almost equal in length; 11 elongate and slender (Fig. 2 View Figure 2 b). Labial palps with 3 palpomeres, apical palpomere subcylindrical (Fig. 2 View Figure 2 c). Maxilla with cardo short; palpomere 2 triangular; palpomere 3 small; palpomere 4 cylindrical and robust (Fig. 2 View Figure 2 d). Clypeus distinct and membranous (Fig. 2 View Figure 2 e). Mandible robust, with a subapical tooth just behind apical tooth (Fig. 2 View Figure 2 f).

Pronotum subrounded, lateral sides evenly rounded, anterior margin slightly convex, posterior margin straight, with a distinct transverse depression at base (Fig. 1 View Figure 1 a).

Scutellar shield small and transverse, with smoothed edges (Fig. 1 View Figure 1 a).

Elytra subparallel, widened behind the base and evenly rounded at apices, base of elytra distinctly wider than pronotum. Humeri distinct, slightly protruding. Elytral apices evenly rounded (Fig. 1 View Figure 1 a).

Hind wings normally developed.

Legs slender. Hind femora not reaching elytral apices. All tibiae thin and straight (Fig. 1 View Figure 1 a). All tarsi with 5 tarsomeres; tarsomere 2 of the anterior tarsi with comb extending over the segment; tarsomere 5 longest and tarsomere 4 shortest in all legs. Claws long and sharp, with small rounded bases (Fig. 2 View Figure 2 g).

Metathorax simple, lacking appendages. Pygidium transverse, with almost straight distal side (Fig. 2 View Figure 2 i). Ultimate abdominal ventrite bilobed, short and transverse (Fig. 2 View Figure 2 h). Tegmen elongate; aedeagus wide, approximately parallel-sided for basal 2/3 in ventral view, then slightly narrowing to blunt apex; endophallus with two rows of small spines (Fig. 2 View Figure 2 j-k).

Female. Length of body 3.5-4.6 mm, width at widest part of elytra 1.6-2.2 mm and at the base of elytra 1.1-1.6 mm.

Similar to male species, except for antennae short and serrate, fore-tarsi lacking comb, pronotum with an inconspicuous transverse depression at base (Fig. 1 View Figure 1 b).

Pygidium sub-trapezoid with apical margin almost straight (Fig. 3 View Figure 3 a). Ultimate abdominal ventrite divided, with long spiculum ventrale (Fig. 3 View Figure 3 b). Ovipositor elongate and membranous (Fig. 3 View Figure 3 c).

Diagnosis

This species is similar to P. pectinicornis (Erichson, 1840) in entirely black pronotum and yellow to black antennae and legs, but can be distinguished from the latter by the elytra with variable black and yellow markings, antennomere 3 scalene triangular in male and subcylindrical in female (Fig. 1 View Figure 1 , Fig. 2 View Figure 2 b). In P. pectinicornis , elytra are black with wide yellow rounded spots at apices, antennomere 3 is equicrural triangular in male and triangular in female ( Tshernyshev 2016a).

Distribution

China (Ningxia); Mongolia (Fig. 4 View Figure 4 ).