Neorhegmoclemina raptoria, Huerta & Dzul, 2010

Huerta, Herón & Dzul, Felipe, 2010, New species of Rhegmoclematini (Diptera: Scatopsidae) from Mexico, Zootaxa 2542 (1), pp. 18-32 : 27-29

Neorhegmoclemina raptoria n. sp.

Figs. 6 A–B

Type material. Holotype male, adult, slide mounted, labeled: “ HOLOTYPE Neorhegmoclemina raptoria n. sp. México, Hidalgo, Tlanchinol, Bosque Mesofilo de Montaña , Km 4 Carretera Tlanchinol-Apantlazol, 7- feb.-1997, trampa Malaise, Cols. Blackaller J., Salceda B. and Pérez A. GPS coordenadas: 20º 59’ 849’’ N; 98º 37’ 538’’ W; elevación: 1465 msnm”. (in CAIM).

Paratype: 1 female. Same data as holotype. (in CAIM) .

Diagnosis. Male terminalia symmetrical; a pair of medial claw-shaped penis valves. Spermatheca twisted.

Description. Female. Color. General body coloration brown. Head. Dark brown; eyes with interfacetal pubescence. Labella setose. Palpus brown, length 0.07 mm, with sparsely distributed setae and an apical sensory pit. Antennae brown, length 0.50 mm, with 10 brown flagellomeres; flagellomeres 1–9 with a single the whorl of sensilla chaetica on the medial portion; total flagellum length, 0.46 mm, last flagellomere clubshape, 0.06 mm, long, with sparse setae and sensilla.

Thorax. Dark brown, scutum sparsely covered with setae; scutellum with a single row of setae; anterior spiracular sclerite triangular, with 33 setae; supra-alar setae 11; antepronotum, proepimeron and proepisternum with scattered setae; anepisternum with 12 anterior setae; katepisternum with 7 setae, meron bare. Legs brown, with pale areas. Coxae brown; fore coxa longer than mid and hind coxae. Femora and tibiae with basal and distal brown rings, pale brown mesally. Tarsi brown, except for hind tarsomere 1, with subbasal narrow pale areas. Femora and tibiae with scattered setae; all tibiae with distal spine-like setae and a single row tibial “comb”. Tarsomeres armed with distal spine and ventral row of palisade setae. Claws curved; empodia present. Wing. Length 1.7 mm; width 0.7 mm; costal length/wing length proportion, 0.47. Veins R 1 and R 4+5 with row of short dorsal setae; M 1 and M 2 complete, M fork not constricted midway between origin and wing margin, both veins gradually diverging towards apex; M 1 3.8 times as long as M; macrotrichia present only on CuA 2. Halter pale brown.

Abdomen dark brown. Sternite 6 with two distinctive socket (alveolus) mesally at posterior margin; segment 7 with tergite and sternite concave posteriorly. Terminalia. Sternite 8 with posterior margin rounded, anterior margin with medial projection; genital fork with an inverse Y-shape, apex pointed; one pair of arms directed anterolaterally beyond the genital opening; two rounded lobes posteriorly. Spermatheca twisted, width, 0.13 mm. Cerci setose.

Male. As female, except as follows. Head. Palpus, length, 0.06 mm. Antennae lost. Thorax. Dark brown; anterior spiracular sclerite triangular, with 26 setae; supra-alar setae 12; anepisternum with 8 anterior setae.

Wing. Length, 1.76 mm; width, 0.8 mm; M 1 4.4 times as long as M; macrotrichia present only on the vein CuA 2. Halter pale brown. Abdomen dark brown. Sternite 6 with two distinctive socket (alveolus) mesally at posterior margin; sternite 7 ( Fig. 6A ) shield-shaped, apodemes separated (ca. 0.1 mm), length, 0.08 mm; tergite 7 concave posteriorly. Terminalia ( Fig. 6B ) symmetrical, length 0.31 mm; tergite 9 triangular in posterior margin, gonocoxite square-shaped with distinctive mesal line sclerotized; gonostyle (gonoforceps s. str. of Cook, 1955a) setose, tapering at apex, with lateral setae well development. Aedeagus (penis s. str. Cook) complex, with lateral shoulders medially, elongate posteromedial projection (broken in specimen examined during slide preparation). Penis valve (s. str. Cook) strongly sclerotized claw-shaped, adjacent base forming diagonal barlike structure.

Distribution. Mexico (Hidalgo).

Bionomics. All specimens were collected by means of Malaise traps.

Etymology. The name raptoria stands for the distinctive claw-like process of the male terminalia.

Discussion. Similar species are known in Neorhegmoclemina Cook from the Nearctic ( Neorhegmoclemina parvum Cook and N. bisaccatum Cook ) and the Neotropical regions ( N. abruptinervis (Duda) , N. acrolophia Cook , N. asymmetricum Cook , N. constricta (Edwards) , N. trichioneura (Duda) and N. willistoni (McAtee)) . Two other undescribed species from Chile were reported by Amorim & Haenni (1996) in the genus and an extinct species in Dominican amber was referred to by ( Cook 1990), but not formally described, while, Amorim (2009) mentioned more undescribed species for Central America.

N. constricta (Edwards) can be distinguished from the remaining species of the genus based on the lack of the well-developed apodemes on sternite 7. All other species of the genus present a pair of anterior apodemes on sternite 7, but differ in the shape of the sclerite. The most notable differences of N. raptoria n. sp., in relation to the remaining species of the genus, concern the strongly sclerotized, claw-shaped sclerite, which is possibly the penis valve. The male terminalia of N. raptoria resemble those of N. parvum Cook , but both species differ additionally in the shape of tergite 9.

Figures

FIGURE 6. Neorhegmoclemina raptoria n. sp. (holotype): Male (A, B). A. Sternite 7, dorsal view. B. Terminalia, ventral view. Scale (mm): 0.064.