Neorhegmoclemina yolotli Huerta & Dzul

Huerta, Heron & Dzul, Felipe, 2015, A distinctive new species of Genus Neorhegmoclemina Cook (Diptera: Scatopsidae) from Mexico, Zootaxa 3911 (3), pp. 369-380 : 370-374

publication ID	https://doi.org/ 10.11646/zootaxa.3911.3.4
publication LSID	lsid:zoobank.org:pub:402EAF60-6644-4083-BECA-D2F1E88750D4
DOI	https://doi.org/10.5281/zenodo.6119284
persistent identifier	https://treatment.plazi.org/id/03CF87FE-FFF7-E304-FF44-FF3EFBE3FE24
treatment provided by	Plazi
scientific name	Neorhegmoclemina yolotli Huerta & Dzul
status	sp. nov.

Treatment

Neorhegmoclemina yolotli Huerta & Dzul View in CoL , sp. nov.

( Figs. 1–9 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 )

Type material. Holotype male, Mexico, Guerrero, Chilpancingo, Ayutla de los Libres, Localidad La Unión, Rancho “El Camalote”, Trampa Malaise, 7-Abr. al 16-Mayo 2009, 70 msnm, Col. W. B. Marin. Paratypes: 1 female, 1 male, same date of holotype.

Diagnosis. First tarsal segment of hind leg with a distinctive apical spine; male sternite 7 triangular; tergite 7 concave, U-shaped; female with 8 flagellomeres, unusual for the genus; spermatheca elongate, sac-like.

Description. Male. Body length approximately 1.2 mm. Head ( Fig.1 View FIGURE 1 A, B): dark brown, longer than wide in lateral view; eyes large, holoptic, with short hairs between facets; ommatidia with similar dimensions, in lateral view at the level of the base of scape, a row of 5 ommatidia disposed from inner to outer ocular margin ( Fig. 1 View FIGURE 1 B); three ocelli, equal in size. Antenna uniformly brown, longer than head ( Fig. 1 View FIGURE 1 D, 2A); scape square; pedidel subcylindrical; flagellum with 10 flagellomeres, flagellomeres I–IX wider than long, flagellomere X elongated; one row of setae on each flagellomere; flagellomeres covered with microtrichia and sensillae, flagellum length, 0.27 mm; frontoclypeus setose; occiput pilose, with a pair of lateral occiput sensillae; tentorium short ( Fig. 1 View FIGURE 1 B); Lshaped internal sclerite at base of labella ( Fig. 1 View FIGURE 1 A); palpus brown, small ( Fig. 1 View FIGURE 1 E, F), as long as pedicel, setose, length 0.048 mm, with two subapical sensory pits, one short ( Fig. 1 View FIGURE 1 E, dorsolateral view), the other wide and shallow ( Fig. 1 View FIGURE 1 F, ventrolateral view); cardo-stipes setose; labellum light brown, longer than the palpus.

Thorax: dark brown, longer than wide; scutum rather sparsely covered with short setae and microtrichia; a regular row of 5 supra-alar setae; scutellum rounded, with a row of setae along posterior margin; antepronotum and proepimeron setose; anterior spicular sclerite with 14 setae ( Fig. 1 View FIGURE 1 C), longer than high, spiracle small, located posterolaterally; pleural sclerites microtrichiose; anepisternal setae 11, katepisternals 6, subalars 4, posterior spiracular sclerite with 1 setae; no meral setae; postnotal phragma well developed, extending into abdominal segment 2.

Legs: ( Fig. 3 View FIGURE 3 A–D) coxae pale brown, fore coxa well-developed, nearly as long as tibia; femora and tibiae similar in length, brownish, femora with apical and tibiae sub-basal brown rings; fore femur enlarged, mid and hind femora normal; tarsomere I of all legs longer than the following segments; tarsomere 1 of hind leg armed with an apical spine ( Fig. 3 View FIGURE 3 D); tarsomere IV on all legs shorter than other segments; claws pointed; empodium welldeveloped.

Wing: ( Fig. 2 View FIGURE 2 B, C) C, radial veins and bM sclerotized, posterior veins faint, infuscated; R1 and R4+5 with an irregularly arranged row of short setae dorsally; membrane covered by microtrichia ( Fig. 2 View FIGURE 2 C); Sc faint. Wing length/section costal 1, 2.7; WL/C2, 3.75; WL/C3, 2.5; WL/C1+C2, 1.6; cross-vein R-M reduced; M fork long, symmetrical, 3.0 times longer than the base of M; M1 and M2 without macrotrichia, fork slender mesally, faint towards wing apex; wing fold between medial and cubital veins present; CuA1 and CuA2 without macrotrichia; CuA1 ending beyond level of the apex of C, faint apically; CuA2 slightly sigmoid, not reaching wing margin; anal veins absent; no macrotrichia on wing cells. Wing length, 0.82 mm, width, 0.40 mm; C extending 0.58 of wing length; 15 dorsal setae on R4+5, 11 dorsal setae on R1; fork of M before apex of C. Halter bearing diminute setae on knob, stem bare.

Abdomen: Dark brown, seven pregenital segments; sternites 1 and 2 unsclerotized; tergites 1 to 6 and sternites 3 to 6 simple sclerotized plates, bearing short setae; spiracles 1 to 6 located at pleural membrane, which is longitudinally ribbed; segment 7 modified ( Fig. 4 View FIGURE 4 A–B), sternite triangular ( Fig. 4 View FIGURE 4 A, 6A), length, 0.10 mm, width, 0.14 mm; tergite 7 ( Figs. 4 View FIGURE 4 B, 6B) concave, U-shaped, length, 0.067 mm, width, 0.11 mm.

Male terminalia: capsule-like ( Figs. 5 View FIGURE 5 A–B, 6C, D), length, 0.096 mm, width, 0.11 mm; gonocoxite concave, with a pair of posterolateral setae; aedeagus complex, V-shaped, extending to base of parameres, with a distinctive medial pointed process; a pair of lateral setose lobes, with one basal and 6 distal setae; paramere shorter than gonostyle, not setose, distally forked into a pair of lobes; gonostyle curved, setose, rounded apically; anterior opening of the genitalia heart-shaped, with heavily sclerotized borders; short and truncate sclerite, medially with a rounded hole in the posterior margin.

Female: Similar to male, with usual gender differences. Head ( Fig. 7 View FIGURE 7 ): antenna longer than head, flagellum with only 8 flagellomeres ( Fig. 7 View FIGURE 7 ) (on only known female), flagellomeres II–VIII wider than long, flagellomere VIII more elongated; a single regular row of setae at each flagellomere; flagellomeres covered by microtrichia and sensillae, flagellum length, 0.20 mm; cardo-stipes narrow; labella large, setose; palpus brown, setose, pyriform, similar in length to pedicel, length, 0.054 mm, with two sensory pits, one short (dorsolateral view) and other subapical (ventrolateral view), wide and shallow.

Thorax: dark brown, longer than wide; scutum rather sparsely covered with short setae and pilosity. Supra-alar setae 5; anterior spiracular sclerite with 20 setae; anepisternals, 23; sub-alars, 3; katepisternals, 9; posterior spiracular sclerite with one longer and 4 short setae; no meral setae. Legs: ( Fig. 8 View FIGURE 8 A–D) coxae pale brown; femora with apical and tibiae with subbasal brown rings; fore femur swollen, similar in length to tibia; femora and tibiae of mid and hind leg similar in length, brownish with lighter annulation; tarsomere I on all legs longer than the other segments, and especially on hind leg, armed with an apical spine ( Fig. 8 View FIGURE 8 D).

Wing: ( Fig. 9 View FIGURE 9 A) C extending 0.57 of wing length; wing length/section costal 1, 3.6; WL/C2, 3.6; WL/C3, 2.2; WL/C1+C2, 1.83. Length 0.91 mm, width 0.41 mm; 16 dorsal setae on R4+5, 12 dorsal setae on R1; M forking before apex of C; CuA1 ending beyond apex of C; CuA2 slightly sigmoid, ending before apex of C.

Abdomen: Dark brown, sternites 1 and 2 unsclerotized; tergites 1 to 6 and sternites 3 to 6 simple sclerotized plates, bearing short setae; segment 7 simple, unmodified, sternite trapezoid in shape, tergite subrectangular.

Female terminalia ( Fig. 9 View FIGURE 9 B): sternite 8 weakly sclerotized, with a pair of distal setose lobes; genital furca very weakly sclerotized, T-shaped; tergite 8 triangular, with a pair of spiracles; spermatheca elongate, sac-like ( Fig. 9 View FIGURE 9 C), curved mesally, 0.15 mm long.

Etymology. We name this species yolotli-, a word meaning “heart” in Nahuatl language, in reference to the shape of the anterior opening of the male genitalia. The term is used as an apposition.