Paradelia nototrigona Ge & Fan

Michelsen, Verner, 2007, Taxonomic review of Eurasian Paradelia Ringdahl (Diptera: Anthomyiidae) with descriptions of two new species, Zootaxa 1592, pp. 1-44 : 16

11. Paradelia nototrigona Ge & Fan in Jin et al., 1981

Figs. 60–64 .

Paradelia nototrigona Ge & Fan in Jin et al., 1981: 90, 92, figs. 14–18.

Descriptive notes. The present line drawings ( Figs. 60–64 ) by D.M. Ackland are based on a male specimen from Nepal (see below) in poor condition but unmistakable by the characteristic structure of sternite V ( Fig. 61 ): posterior lobes “hooked”, on distal angles with a single, strong seta. Sternite IV ( Fig. 60 ) is posteriorly expanded and long-setose, while sternite III remains very slender; surstyli ( Fig. 62 ) without lateral, subdistal constriction; and pregonite ( Fig. 63 ) with a single apical setula. Further, the species is without setulae on ventral and dorsal surfaces of wing vein C.

Relationships. The absence of lateral setae on posterior lobes of sternite V and the absence of a posterior submedian seta on the pregonites readily assign P. nototrigona to the P. intersecta section. The present, more specified placements in the P. intersecta subsection and the P. intersecta infrasection were based on a misinterpretation of the original illustrations of the male terminalia by Ge & Fan in Jin et al. (1981) in which I saw the presence of articulated digitiform appendages either distally or subdistally on the lobes of sternite V, as was also concluded by Griffiths (1987: 777). An unexpected new set of more detailed drawings kindly provided by D.M. Ackland ( Figs. 60–64 ) after the submission of the present paper requires a reconsideration of the issue. A placement of P. nototrigona in the P. lundbeckii subsection, as sister-species to the remaining species, is now regarded as most plausible based on the downward-angled distal part of the posterior lobes of sternite V formed by the angular lamella and setulose apex in combination. A placement outside the P. intersecta subsection is also supported by the simple shape of the surstyli without a lateral constriction.

Distribution. Previously only known from a series of males from China: Gansu province: Wenxian county, collected in ‘late spring’, 22.iii.1979, but D.M. Ackland has kindly informed me that he has found a male specimen in a collection of anthomyiids from Nepal: 27.58N 85.00E [Bagmati zone; Dhadang district], 11,100 ft., 1 male, in Malaise trap 11–12.v.1967, Can. Nepal Exped.

Figures

FIGURES 60 – 64. Paradelia nototrigona, male. 60. Sternite IV. 61. Sternite V, ventral and lateral views. 62. Cerci and surstyli, caudal and lateral views. 63. Pre- and postgonites, lateral view. 64. Phallus and phallapodeme, lateral view. Same scale for 62 – 64. D. M. Ackland del., after specimen from Nepal.