Pseudoanthidium (Pseudoanthidium) tenellum ( Mocsáry, 1880 )

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 : 135

Pseudoanthidium (Pseudoanthidium) tenellum ( Mocsáry, 1880)

( Figs 1a–h )

Anthidium tenellum Mocsáry, 1880: 48 . Syntypes ♂ ♀, [ Hungary] “ Hungaria centrali et meridionali“, HNHM, examined.

Paranthidiellum campulodonta Wu, 1990: 246 . Holotype: ♂, China, Inner Mongolia, Alxa Meng, Ejin Qi, 20.VI.1986, leg. Jun- Shan BAO, IZCAS, examined. New synonym.

Pseudoanthidium (s. str.) campulodonta ( Wu, 1990) : Wu, 2006: 188, ♂, fig. 104.

Diagnosis: Male. Body length 6.5mm; body black, metasomal terga with reddish maculations ( Figs 1a, 1e ); mandible with 3 teeth; paraocular area maculated only up to the level of the antennal socket ( Fig. 1b ); gonostylus expanded subapically and widely, shallowly notched apically. ( Fig. 1f ); apical margin of S7 emarginate medially ( Fig. 1g ).

Material examined: Inner Mongolia, Alxa Meng, Ejin Qi (41º54′N, 101º00′E), 1 ♂, 20. VI .1986, leg. Jun- Shan BAO (holotype) .

Distribution: China (Inner Mongolia).

Remarks: The male holotype of Paranthidiellum campulodonta is not distinguishable from Pseudoanthidium tenellum (Mocsáry) described from Hungary and known to be present eastward as far as Tajikistan ( Ascher & Pickering 2021). The male sterna and genitalia are the same based on comparison of the holotype of P. campulodonta with topotypical specimens of P. tenellum . The only discernible distinction is the slightly coarser punctation of T5 and T 6 in the male, which is known to vary in some other species of Pseudoanthidium s. str. The shape of the gonostylus is unique among known Pseudoanthidium s. str.

Figures

FIGURE 1. Pseudoanthidium (Pseudoanthidium) tenellum (Mocsáry, 1880), male. a: Body in lateral view; b: Head in frontal view; c: Head in lateral view; d: Mesosoma in dorsal view; e: Metasoma in dorsal view; f: Genitalia in dorsal view; g: S7 in ventral view; h: S8 in ventral view. Scale bar: a, b, c, d, e, 1 mm; f, g, h, 0.5 mm.