Himantigera xanthopoda, Fachin & Hauser, 2018

Fachin, Diego Aguilar & Hauser, Martin, 2018, Taxonomic revision of the Neotropical genus Himantigera James, 1982 (Diptera: Stratiomyidae: Sarginae), including the description of two new species and a key to the known species, Zootaxa 4531 (4), pp. 451-498 : 475-479

Himantigera xanthopoda nov. sp.

( Figs 5 , 22 , 31 , 37 , 43 , 54 , 75–77 , 102–105 , 111 , 117 ) http://zoobank.org/NomenclaturalActs/ 0626C676-B558-4470-8C30-563F11BF749E

Diagnosis (male). Legs entirely yellow to white ( Fig. 117 ). R 2+3 originating well beyond r–m, at a distance two times longer than r–m ( Fig. 31 ). Abdomen elongate, wider apically, widest at fourth segment ( Fig. 54 ).

Material examined. HOLOTYPE: ♂, COSTA RICA, Puntarenas Prov. [Province], Estación Biológica Monteverde , 1540 m, 10°19’23”N 84°48’38”W, 13.vi.2000, N.E. Woodley (USNM-USNMENT01447641). PARATYPES: 1 ♂ (left antenna and right wing slide-mounted), COSTA RICA, same date as holotype (USNM- USNMENT01447642). 1 ♂, Puntarenas Prov. [Province], San Vito, Estación Biológica Las Alturas , 1500 meters, 8°57’N 82°50’W, iii.1992, Malaise trap, P. Hanson (USNM-USNMENT01447643) ; 2 ♂, San Vito, Estación Biológica Las Alturas , 1500 meters, 8°57’N 82°50’W, iv.1992, Malaise trap, P. Hanson (1 ♂, USNM- USNMENT01447644; 1 ♂, MZUSP-MZ 052813) ; 1 ♂, Las Alturas , 8.95°N 82.83°W, iv.1992, 1500m, Malaise trap, P. Hanson ( LACM) ; 1 ♂, Las Alturas , 8.95°N 82.83°W, 11–13.vi.1998, B. Brown, V. Berezovskiy, Malaise trap #2, 1500m ( LACM) . 1 ♂, NICARAGUA, Matagalpa Prov. [Province], Selva Negra Mountain Resort, lower forest, 1200–1300 meters, 12°59.89’N 85°54.64’W, 18.vi.2007, mercury vapor light, N.E. Woodley (USNM- USNMENT01447685) .

Additional material: 1 ♂, MEXICO, Chiapas, Município de Angel Albino Corzo (Jaltenango), above Finca Custepec , 1371 m, 11.viii.1981, D.E & L.A. Breedlove ( UCB) .

Description. Male. Length: body, 8.0–12.0 mm; wing, 7.0–10.0 mm. Head ( Fig. 22 ). Upper frons narrower than widest margin of frontal callus. Frontal callus margin divergent towards face. Arista-like terminal flagellomere with four setae basally ( Fig. 5 ). Thorax. Legs entirely yellow, except hind tarsomeres white. Wing ( Fig. 31 ). R 2+3 originating well beyond r–m, at a distance two times longer than r–m ( Fig. 37 ). Alula with microtrichia only along anterior half ( Fig. 43 ). Abdomen ( Fig. 54 ). Elongate, two times longer than wide, widest at fourth segment; entirely dark; tergites 1–3 with strong metallic green reflections, tergites 4–5 and sternites with coppery reflections; long golden pilosity laterally on tergites 1–3; short yellow pilosity on tergites 4–5 and sternites. Terminalia ( Figs 75–77 , 102–105 ). Genital capsule as wide as high, its posterior margin weakly pointed dorsally; medial process of synsternite weakly developed ( Fig. 105 ), few thin setae apically. Anterior end of phallus distally to anterior margin of genitalia. Gonostylus at least two times longer than wide, pointed apically. Epandrium slightly wider than long ( Fig. 75 ).

Female. Unknown.

Etymology. The specific epithet is feminine and it comes from the Greek word xanthos, meaning yellow, and podos, meaning foot, as a reference to the yellow leg color.

Geographic distribution. Mexico (Chiapas), Nicaragua (Matagalpa), Costa Rica (Puntarenas) ( Fig. 130 ).

Comments. One additional specimen from Mexico (Chiapas) has the apical third of the hind femur dark brown, however, overall morphology and male genitalia fit with that of the other specimens.

Figures

FIGURE 130. Geographic distribution of Himantigera species. Squares represent holotypes, and circles paratypes and additional material.

FIGURES 1–6. Antennae of Himantigera species. 1. H. nigrifemorata, female. 2. H. silvestris, male. 3. H. superba, male. 4. H. amauroptera nov. sp., male paratype. 5. H. xanthopoda nov. sp., male paratype. 6. H. sp. A., female. Abbreviations: ar t flgm, arista-like terminal flagellomere; flg, flagellum; ped, pedicel; scp, scape.

FIGURES 13–24. Head in frontal view of Himantigera species. 13–16. H. nigrifemorata (13. Male, Mexico; 14. Female, Mexico; 15. Male, Costa Rica; 16. Female, Costa Rica). 17–18. H. silvestris (17. Male, paratype [CNC]; 18. Female). 19. H. superba, male. 20–21. H. amauroptera nov. sp., paratype (20. Male; 21. Female). 22. H. xanthopoda nov. sp., male holotype. 23. H. sp. A, female. 24. H. sp. B, male. Scale bar, 1.0 mm.

FIGURES 29–32. Wings of Himantigera species. 29. H. amauroptera nov. sp., male paratype. 30. H. amauroptera nov. sp., female paratype. 31. H. xanthopoda nov. sp., male paratype. 32. H. sp. A, female. Scale bar, 1 mm.

FIGURES 33–38. Detail of vein R 2+3 in wings of Himantigera species. 33. H. nigrifemorata, male. 34. H. silvestris, male, paratype [CNC]. 35. H. superba, male. 36. H. amauroptera nov. sp., male paratype. 37. H. xanthopoda nov. sp., male paratype. 38. H. sp. A, female. Black arrow points R 2+3 vein. Scale bar, 0.5 mm. Abbreviation: R 2+3, second branch of radius.

FIGURES 39–44. Wing base of Himantigera species. 39. H. nigrifemorata, male. 40. H. silvestris, male, paratype [CNC], Mexico. 41. H. superba, male, Peru. 42. H. amauroptera nov. sp., male paratype. 43. H. xanthopoda nov. sp., male paratype. 44. H. sp. A, female. Black arrow points Cu, basal to true cubital fork. Scale bar, 0.5 mm. Abbreviation: Cu, cubital vein or cubitus.

FIGURES 45–55. Abdomen in dorsal view of Himantigera species. 45–47. H. nigrifemorata (45. Male, Mexico; 46. Female, Mexico; 47. Female, Costa Rica). 48–49. H. silvestris (48. Male, paratype [CNC]; 49. Female). 50. H. jamesi [= H. superba], male holotype [SMNS], Brazil. 51. H. superba, male. 52–53. H. amauroptera nov. sp., paratype (52. Male; 53. Female). 54. H. xanthopoda nov. sp., male paratype. 53. H. sp. B, male. Scale bar, 1.0 mm.

FIGURES 75–77. Male terminalia of Himantigera xanthopoda nov. sp., paratype. 75. Epandrium, proctiger and cerci, dorsal view. 76. Genitalia, dorsal view. 77. Genitalia, ventral view. Abbreviations: cerc; cercus; epand, epandrium; gonst, gonostylus; goncx apod, gonocoxal apodeme; pm sh, parameral sheath; mps, medial process of synsternite; ph, phallus; prct, proctiger; synst, synstenite.

FIGURES 96–105. Male terminalia of Himantigera species (phallus, T9, T10, S10 and cerci removed; phallus only not removed in 96 and 104). 96–98. H. superba (96. Dorsal view; 97. Lateral view; 98. Posterior view). 99. H. amauroptera nov. sp., paratype, posterior view. 100–101. H. sp. B (100. Dorsal view; 101. Ventral view). 102–105. H. xanthopoda nov. sp., paratype (102. Dorsal view; 103–104. Lateral view; 105. Posterior view). Scale bar, 0.1 mm. Abbreviations: gonst, gonostylus; goncx apod, gonocoxal apodeme; mps, medial process of synsternite; ph, phallus; synst, synstenite.

FIGURES 106–111. Himantigera species, habitus, dorsal, male. 106–107. H. nigrifemorata (106. Mexico; 107. Costa Rica). 108. H. silvestris, paratype [CNC]. 109. H. superba. 110. H. amauroptera nov. sp., paratype. 111. H. xanthopoda nov. sp., holotype. Scale bar, 1 mm.

FIGURES 112–117. Himantigera species, habitus, lateral, male. 112–113. H. nigrifemorata (112. Mexico; 113. Costa Rica). 114. H. silvestris, paratype [CNC]. 115. H. superba. 116. H. amauroptera nov. sp., paratype. 117. H. xanthopoda nov. sp., holotype. Scale bar, 1 mm. Red arrow points to the fore leg of H. silvestris.