Pseudoanthidium (Pseudoanthidium) yanruae Niu & Zhu, 2021

Niu, Ze-Qing, Luo, A-Rong, Griswold, Terry & Zhu, Chao-Dong, 2021, Review of the bee genus Pseudoanthidium Friese, 1898 (Hymenoptera: Apoidea Megachilidae: Anthidiini) of China with descriptions of three new species, Zootaxa 4996 (1), pp. 133-152 : 144-147

Pseudoanthidium (Pseudoanthidium) yanruae Niu & Zhu , sp. nov.

( Figs 8a–h , 9a–h )

Diagnosis: The new species is very similar to P. (P.) orientale , but its frons is black, without oval yellow spot ( Fig. 8b ), clypeus yellow, with two black longitudinal belt-shaped markings ( Fig. 8b ), mandible of female with six teeth ( Fig. 8d ), mandible of male with three teeth ( Fig. 9b ), S8 of male sub-trapezoid-shaped, basal median with a spiculum ( Fig. 9g ).

Description: Female, BL= 7.4 mm ( Fig. 8a ); head broader than long, HW: HL=59: 48 ( Fig. 8b ); gena slightly broader than eye, GW: EW=15: 12 ( Fig. 8c ); width of metasoma slightly narrower than the width between the tegu- lae, MtW: MsW=55: 60. Clypeus broader than long, with shallower and denser rounded punctures ( Fig. 8b ); vertex, frons and gena with deeper and denser rounded punctures ( Fig. 8c ); scutum and scutellum with rounded, dense punctures, size of punctures as same as that on vertex ( Fig. 8e ); disc of T1–T5 with smaller and denser rounded punctures ( Fig. 8g ); mandible widened apically, with 6 teeth ( Fig. 8d ); subantennal suture directed toward outer margin of antennal socket, distinctly arcuate outward ( Fig. 8b ); fore wing with two submarginal cells, the first one slightly shorter than the second one, basal vein straight, meeting vein Cu at acute angle, 1 st m-cu joining first submarginal cell, 2 nd m-cu slightly exceeding apical margin of second submarginal cell, marginal cell distal to stigma on costa longer than stigma, marginal cell longer than distance from its apex to wing tip, stigma nearly twice as long as broad, prestigma long, nearly twice as long as broad ( Fig. 8h ); pronotal lobe lamellate; omaulus rounded; axilla rounded posterolaterally ( Fig. 8e ); scutellum posterior margin rounded ( Fig. 8e ); propodeum without basal series of pits and without fovea behind spiracle ( Fig. 8f ); basal margin of T1 with carina ( Fig. 8g ); T6 with apical margin produced medially, slightly crenulate ( Fig. 8g ); tarsal claw with inner median tooth, arolium absent ( Fig. 8a ). Clypeus yellow, with two black longitudinal belt-shaped markings, paraocular area maculated up to top of eye ( Fig. 8b ); basal 2/3 part of mandible yellow ( Fig. 8d ); vertex black, with two yellow broad belt-shaped markings, and the markings extend downward to gena ( Fig. 8c ); frons black, without yellow spot ( Fig. 8b ); supraclypeal area black ( Fig. 8b ); pronotal lobe black; scutum black, apical margin with two narrow belt-shaped markings, and the markings bending backward along the lateral margin of scutum to the middle level of tegula ( Fig. 8e ), tegula yellow apically ( Fig. 8e ); axilla yellow ( Fig. 8e ); scutellum black, with two rectangle-shaped markings apicolaterally ( Fig. 8e ); metasomal tergum black, T1–T5 with two yellow bands respectively, and the bands on T1 obviously narrower than others ( Fig. 8g ); except middle femur yellow apically, out surface of fore tibia and middle tibia yellow, basal 1/3 part of hind tibia yellow, fore tarsus and middle tarsus blackish brown, other parts of all legs black ( Figs. 8a, 8c ). Pubescence sparse; apical margin of clypeus, periphery of antennal socket covered paler white hairs ( Fig. 8b ); vertex, scutum and scutellum covered with sparse yellowish-brown hairs ( Fig. 8a ); episternum covered sparse white hairs ( Fig. 8c ); coxa, trochanter, femur, out surface of middle basitarsus and hind basitarsus covered white hairs, inner surface of middle basitarsus covered yellowish-brown hairs, inner surface of hind basitarsus covered brownish hairs; S2–S5 with denser, longer yellowish-white hairs forming scopa ( Fig. 8a ).

Male, BL= 7.5 mm; head broader than long, HW: HL=54: 46 ( Fig. 9a ); gena slightly narrower than eye, GW: EW=13: 15; width of metasoma slightly narrower than the width between the tegulae, MtW: MsW=56: 60. Clypeus broader than long, with shallower and denser rounded punctures ( Fig. 9a ); vertex, frons and gena with deeper and denser rounded punctures; scutum and scutellum with rounded, dense punctures, size of punctures as same as that on vertex; mandible not widened apically, with 3 teeth ( Fig. 9b ); subantennal suture directed toward outer margin of antennal socket, distinctly arcuate outward ( Fig. 9a ); structural features of fore wing as same as that of female; pronotal lobe lamellate; omaulus rounded; axilla rounded posterolaterally; scutellum posterior margin rounded; propodeum without basal series of pits and without fovea behind spiracle; basal margin of T1 with carina; pygidial plate absent; tarsal claw with inner median tooth, arolium absent. Clypeus yellowish white, with two black longitudinal belt-shaped markings, but the markings not obvious, paraocular area maculated up to top of eye ( Fig. 9a ); supraclypeal area black, with a small sub-triangular yellow marking apically ( Fig. 9a ); mandible yellow ( Fig. 9b ); vertex black, with two yellow broad belt-shaped markings, and the markings extend downward to gena; frons black, without yellow spot ( Fig. 9a ); pronotal lobe black; scutum black, apical margin with two narrow belt-shaped markings, and the markings bending backward along the lateral margin of scutum to the middle level of tegula, tegula yellow apically; axilla yellow; scutellum black, with two rectangle-shaped markings apicolaterally; metasomal tergum black, T1–T6 with two yellow bands respectively, the bands on T1–T3 broad, belt-shaped, and that on T4–T6 large, tetragonal ( Fig. 9c ); T7 markedly narrower than T6, two lobed ( Fig. 9c ); S3 with comb of long, wavy bristles; disc of S4 with long hairs ( Fig. 9d ); S5 posterior margin concave, with two well separated median lobes and comb at apex of apicolateral projection ( Fig. 9e ); S7 square-shaped ( Fig. 9f ); S8 sub-trapezoid-shaped, basal median with a spiculum ( Fig. 9g ); genitalia as in Fig. 9h .

Type material: Holotype: ♀, China, Yunnan, Jingdong Xian (24º24′N, 100º48′E), 2.V.1957, leg. Zeng-Hao ZHU; paratypes: 1 ♀, China, Yunnan, Dali, Diancang Shan (25º39′N, 100º06′E), 14.IV.2009, leg. Rui ZHANG; 1 ♀, China, Yunnan, Pu’er Xian, Ximahe Wetland Park (22º48′N, 100º58′E), 24.IV.2018, leg. Yong WANG; 1 ♂, China, Yunnan, Dali, Diancang Shan (25º39′N, 100º06′E), 14.IV.2009, leg. Rui ZHANG.

Distribution: China (Yunnan).

Etymology: The specific name is dedicated to Professor Yan-Ru Wu for her contributions to bee taxonomy.

Remarks: This species appears closely related to P. orientale as indicated in the diagnosis and may prove to be synonymous. The number of mandibular teeth is likely not diagnostic. A female of P. orientale from Thailand has six teeth on one mandible and five on the other. That Thailand specimen is more heavily maculated than P. yanruae . The male associated with this species does not differ from P. orientale in the combs of S5 and the shape of the gonostylus.

Figures

FIGURE 8. Pseudoanthidium (Pseudoanthidium) yanruae Niu & Zhu, sp. nov., female, holotype. a: Body in lateral view; b: Head in frontal view; c: Head in lateral view; d: Mandible in lateral view; e: Mesosoma in dorsal view; f: Propodeum in dorsolateral view, showing the propodeal spiracle; g: Metasoma in dorsal view; h: Wing in frontal view. Scale bar: a, b, c, e, g, h, 1 mm; d, f, 0.5 mm.

FIGURE 9. Pseudoanthidium (Pseudoanthidium) yanruae Niu & Zhu, sp. nov., male, paratype. a: Head in frontal view; b: Mandible in lateral view; c: T5-T7 in dorsal view; d: S4 in frontal view; e: S5-S6 in ventral view; f: S7 in ventral view; g: Genitalia and S8 in frontal view; h: Genitalia in dorsal view. Scale bar: a, b, c, d, e, f, 1 mm; g, h, 0.5 mm.