Bathanthidium (Bathanthidium) fengkaiense Niu & Zhu, 2019

Niu, Ze-Qing, Ascher, John S., Griswold, Terry & Zhu, Chao-Dong, 2019, Revision of the bee genus Bathanthidium Mavromoustakis (Hymenoptera: Apoidea Megachilidae: Anthidiini) with description of a new species from China, Zootaxa 4657 (1), pp. 97-116 : 101-102

Bathanthidium (Bathanthidium) fengkaiense Niu & Zhu , sp. nov.

( Fig. 1 a–f, 2a–f)

Diagnosis: The new species belongs to Bathanthidium s. str. based on having fovea behind propodeal spiracle rounded and delimited by strong carina. It is very similar to B. hainanense Niu et al., 2012 , but the pattern of yellow markings on metasomal terga ( Fig. 2d ) is different from that of B. hainanense , T1–T2 of the new species black, without yellow marking, T3–T5 with broader yellow bands, and the band on T3 obviously interrupted medially ( B. hainanense T2 medially with a pair of small, stripe-like yellow markings, and bands on T3–T5 entire); mandible with four teeth, and the lowest tooth acute and obviously longer than others ( B. hainanense although with four teeth on mandible, but the lowest tooth slightly rounded).

Description: Female, BL=7.5 mm ( Fig. 1a ); head broader than long, HW: HL=55: 47 ( Fig. 1b ); gena narrower than eye, GW: EW=12: 15 ( Fig. 1c ); width of metasoma nearly as broad as the width between the tegulae. Clypeus broader than long, with round small and dense punctures; vertex, frons and gena with round large and dense punctures; mesoscutum and scutellum with round, dense punctures, size of punctures as same as that on vertex; T1–T5 with round, small and dense punctures; mandible widened apically, with 4 teeth, the lowest tooth acute and longest ( Fig. 1e ); subantennal suture directed toward outer margin of antennal socket; face without longitudinal median ridge ( Fig. 1b ); fore wing with two submarginal cells, the first one slightly longer than the second one, basal vein nearly straight, meeting vein Cu at acute angle, 2nd m-cu slightly exceeding apical margin of 2nd submarginal cell, marginal cell distal to stigma on costa longer than stigma; stigma nearly twice as long as broad, prestigma short, less than twice as long as broad ( Fig. 1f ); jugal lobe of hind wing less than half as long as vannal lobe, vein cu-v oblique and short, obviously less than half as long as second abscissa of M+Cu; pronotal lobe with a dorsal-anterior carina; omaular carina present, extending down only to middle of mesepisternum ( Fig. 1c ); axilla rounded and not produced posteriorly ( Fig. 1d ); metanotum without median spine; scuto-scutellar fovea open, each half of scutoscutellar fovea about four times as wide as long ( Fig. 1d ); fovea behind propodeal spiracle rounded, delimited by strong carina ( Fig. 2a ), basal zone of propodeum distinct laterally, with regular, shiny pits ( Fig. 2a ); basal margin of T1 with carina; pygidial plate absent; front and middle tibia with one spine on outer side ( Fig. 2b ), hind tibia without spine ( Fig. 2e ); outer surface of tibiae without tubercles; tarsal claws with inner median tooth, arolia present ( Fig. 2c ). Clypeus, mandible, vertex, frons, pronotal lobe, mesoscutum, scutellum, and all legs black; paraocular area at ventral extreme with a little sub-rectangle dull yellow mark ( Fig. 1b ); metasoma black, only T3–T5 with broader yellow bands, and the band on T3 obviously interrupted medially ( Fig. 2d ). Pubescence sparse; clypeus, paraocular area with sparse paler white short hairs; vertex, mesoscutum and scutellum covered with sparse blackish-brown short hairs; apical margin of S6 with fine and denser dull brownish-yellow hairs ( Fig. 2e ); S2–S5 with denser, longer golden-yellow hairs forming scopa for pollen-carrying ( Fig. 2f ).

Male, unknown.

Type material: Holotype: ♀, China, Guangdong, Fengkai Xian (32º00′N 113º24′E), 24.IV.2013, Ming-Hua ZHANG ; Paratype: 1 ♀, same label information as holotype.

Floral association: Ilex triflora (Aquifoliaceae) .

General distribution: China (Guangdong).

Etymology: The type location Fengkai (Guangdong province, China) is given as the specific name.

Figures

FIGURE 1. Bathanthidium (Bathanthidium) fengkaiense Niu & Zhu, sp. nov., female. a: Body in lateral view; b: Head in frontal view; c: Head in lateral view; d: Mesonotum in dorsal view; e: Mandible in frontal view; f: Wings in frontal view. Scale bars: 1mm.

FIGURE 2. Bathanthidium (Bathanthidium) fengkaiense Niu & Zhu, sp. nov., female. a: Fovea behind the spiracle in dorso- lateral view; b: Middle tibial spine in lateral view; c: Claw of hind leg in lateral view; d: Metasoma in dorsal view, showing the pattern of yellow markings on metanotum; e: Metasoma in lateral view, showing the scopa; f: Metasoma in ventral view, showing S6. Scale bars: 1mm.