Paratanytarsus grimmii ( Schneider, 1885 )

Paratanytarsus grimmii ( Schneider, 1885) View in CoL

Diagnosis. Adult males of Paratanytarsus grimmii are closely related to P. laetipes ( Zetterstedt, 1850) and P. toyaprimus Sasa, 1988 , and share the following morphological features: anal point subtriangular with narrow anal crests, median volsella with spoon-shaped lamellae, and superior volsella subcircular with simple digitus. However, P. grimmii is distinguished from these species by the following characteristics: AR 0.92–1.05, frontal tubercles absent, anal crests parallel-sided, median volsella never reaching to tip of inferior volsella, superior volsella with only few microtrichia present on basidorsal side.

Description

Adult male (n = 6) Total length 3.8 mm wing length 1.58–1.98 mm, wing width 0.36–0.47 mm.

Coloration. Scutal ground yellowish green, stripes dark brown. Scutellum yellowish green. Postnotum dark brown. Abdominal tergites and legs yellowish green ( Fig. 1 View FIGURE 1 ).

Head. Microtrichia present on proximal and distal parts of inner margins of eyes.Antennae with 13 flagellomeres. AR 0.92–1.05 (0.96). Clypeus with 15–18 setae. Frontal tubercles absent. Palpomere II–V (in μm): 32–47, 99–119, 97–118, 141–165.

Thorax. Acrostichals 11–14. Dorsocentrals 6–12. Prealars 1. Scutellum with 4–6 setae.

Wing. Squama bare. Wing with setae entire surface as shown in Fig. 2A View FIGURE 2 .

Legs. Fore leg tibia with simple spur. Mid and hind legs tibial combs narrowly separated, and spur present on both combs. Mid leg basitarsus without sensilla chaetica. Length and proportion of legs as in Table 2 View TABLE 2 .

Hypopygium ( Fig. 2B–E View FIGURE 2 ). Anal point subtriangular, bare, anal crests parallel-sided, narrow. Anal tergite bands V-type, broadly separated, with 4–5 median setae placed on small tubercles. Superior volsella subcircular, with 6–8 setae and few microtrichia present on basidorsal side ( Fig. 2B–C View FIGURE 2 ). Digitus tapering to blunt apex, extending far beyond superior volsella. Median volsella short, reaching 2/3 of the inferior volsella, with approximately 10 spoon-shaped lamellae on distal 1/4 and 4–5 setiform lamellae on ventral 3/4( Fig. 2B–D View FIGURE 2 ). In one specimen, a triangular structure was observed at the basal part of the median volsella ( Fig. 2E View FIGURE 2 ). Inferior volsella thick, apically bent inward. Gonostylus crescent-shaped.