Allorhynchium diffinis (Giordani Soika, 1986)

Luo, Li, Zhang, Qiao-Hua, Chen, Bin & Li, Ting-Jing, 2020, Additions to the knowledge of the genus Allorhynchium van der Vecht, 1963 from China (Hymenoptera, Vespidae, Eumeninae), Journal of Hymenoptera Research 77, pp. 119-137 : 119

Allorhynchium diffinis (Giordani Soika, 1986)

Figs 20-28

Archancistrocerus diffinis Giordani Soika, 1986: 143-146.

Allorhynchium diffinis (Giordani Soika, 1986): Tan et al. 2018: 49-64.

Material examined.

6♀♀ 1♂, China, Sichuan Prov., Leshan City, Emeishan County, Shaxi Town , 29°25.083'N, 103°26.913'E, 926 m, 11.VIII.2011, Tingjing Li (CQNU) ; 2♀♀, China, Sichuan Prov., Yaan City, Lushan County, Taiping Town , Chunguang village , 30°18.794'N, 102°59.351'E, 964 m, 12.VIII.2018, Xue Zhang (CQNU) ; 1♀, China, Sichuan Prov., Yaan City, Lushan County, Shuangshi Town , Xichuan village , 30°16.129'N, 102°53.403'E, 982 m, 11.VIII.2018, Huachuan Wang and Qian Han (CQNU) .

Notes.

The species A. diffinis in the original description was identified on a single female from Sichuan, China ( Giordani Soika 1986) and A. radiatum Li et al., 2019 was related to it. In this study, some more specimens of A. diffinis , including one male were also collected from Sichuan. Meanwhile, some specimens ( Allorhynchium A, Figs 37-46 ) from Guangxi, China are similar to both A. diffinis and A. radiatum , and some other female specimens ( Allorhynchium B, Figs 47-52 ) from Guangdong, China are similar to A. radiatum by black body (Fig. 47 ). To precisely classify these specimens, COI genes of A. diffinis , A. radiatum , Allorhynchium A and Allorhynchium B are sequenced and analyzed. Four other COI sequences of A. argentatum , A. chinense , Anterhynchium flavomarginatum and Vespa mandarinia of the same family Vespidae are selected for comparison.

Sequence alignment results display that the same COI sequence occurs in Allorhynchium A, Allorhynchium B and A. radiatum , and 29 different nucleic acids are present in A. radiatum , Allorhynchium A, Allorhynchium B and A. diffinis (Suppl. material 1: Figure S1). ML tree topology reflects that A. diffinis is sister of A. radiatum , Allorhynchium A and Allorhynchium B, with 100% bootstrap value of support for the branch(Fig. 19 ); the genetic pairwise distance based on K2P (Kimura-2-parameter substitution model) ( Kimura 1980) among Allorhynchium A, Allorhynchium B and A. radiatum is 0 and the distance between A. diffinis and A. radiatum , Allorhynchium A, and Allorhynchium B is 4.3% (Table 2 ). According to Hebert’s view that the average difference of COI sequences within the same species is usually less than 2% ( Hebert et al. 2003), our results suggest that both Allorhynchium A and Allorhynchium B belong to A. radiatum , and A. diffinis and A. radiatum be valid species, respectively.

First description of male

(Fig. 21 ): sculpture, punctuation, setae, and coloration similar to female (Figs 20 , 23 , 26 ); body length 13.5 mm, with large yellow spots and bands (Fig. 21 ): clypeus (Fig. 24 ) wholly, wide band along lower inner eye orbit, large inter-antennal spot, scape ventrally, wide anterior band of pronotum, large spot on mesepisternum, tegula except a central translucent spot, parategula, two spots of metanotum, dorsal and posterior faces of propodeum largely, wide apical band on each of both terga I and II; head and mesosoma coarsely punctate, punctures of metasoma sparser than those of head and mesosoma; A13 (Fig. 25 ) blunt, short and bent backward not beyond the middle of A11; S2 (Fig. 27 ) protruding medially into a big and strong crest in lateral view and rounded apically; S7 (Fig. 28 ) with three distinct teeth at basal area; genitalia as in Fig. 22 : apex of penis valve not round in frontal view, apex of volsella slightly narrow in frontal view.

Diagnosis.

Body with large yellow markings: clypeus wholly, anterior half of pronotum, propodeum largely, tegula except brown spot, parategula, and wide apical bands on T1-T2; clypeal apex deeply emarginated and forming acute tooth on each lateral side; body with coarse punctures, punctures on both head and mesosoma denser than those on metasoma; A13 short, bent backward, and not beyond the middle of A11; S2 protruding medially into a big and strong crest and rounded apically; S7 with three distinct teeth at basal area.

Distribution.

China (Sichuan).

Figures

Figure 19. Maximum likelihood tree of eight COI sequences (The nodes are shown with their bootstrap values; Vespa mandarinia was used as the out-group)

Figures 20 - 28. Allorhynchium diffinis (Giordani Soika, 1986) 20 habitus (dorsal view) ♀ 21 habitus (dorsal view) ♂ 22 genitalia (front view), ♂ 23 clypeus, ♀ 24 clypeus, ♂ 25 apex of antenna, ♂ 26 metasoma (dorsal view), ♀ 27 S 2, ♂ 28 S 7, ♂.

Figures 37 - 46. Allorhynchium radiatum (Allorhynchium A, from Guangxi) 37 habitus (dorsal view), ♀ 38 habitus (dorsal view), ♂ 39 genitalia (front view), ♂ 40 clypeus, ♀ 41 clypeus, ♂ 42 apex of antenna, ♂ 43 - 45 variations of S 2, ♂ 46 S 7, ♂.

Figures 47 - 52. Allorhynchium radiatum (Allorhynchium B, from Guangzhou) 47 habitus (dorsal view) ♀ 48 head, (dorsal view) ♀ 49 clypeus, ♀ 50 metasoma (dorsal view), ♀ 51 mesosoma (dorsal view), ♀ 52 metasoma (ventral view), ♀.