Neodexiopsis nigrocalyptrata, Couri & Gomes & Carvalho, 2023

Couri, Márcia Souto, Gomes, Lucas Roberto Pereira & Carvalho, Claudio José Barros de, 2023, Neodexiopsis Malloch (Diptera, Muscidae) from Ecuador: description of new species and a key to the species, Revista Brasileira de Entomologia (e 20230017) 67 (3), pp. 1-9 : 4-6

Neodexiopsis nigrocalyptrata new species urn:lsid:zoobank.org:act:73DDC2D4-9DED-4B41-8779-89E29508C1C2 ( Figs 3A–F , 6C ) Diagnosis: The species is morphologically close to N. nigerrima (Malloch, 1934), which occurs in Chile and Argentina but lacks the anteroventral seta on the hind tibia, and the calypteres in females are dark brown. Both characters easily distinguished this species from other Neodexiopsis species recorded in Ecuador.

Description: Male. Length: body: 3.8 mm; wing: 4.2 mm.

Color: General color black, sometimes shining under certain lights. Parafacial, fronto-orbital plate, gena, face, and frons black. Antenna, arista, and palpus dark brown. Calypteres dark brown with darker margins; halter black. Wing smoky and darker on the longitudinal upper third. Mesonotum, pleurae, and legs are dark brown. Abdomen dark brown without clouds.

Head: Eyes bare; inner and outer vertical setae long. Frontal row with four pairs of long setae, second shorter, upper backward directed. Ocellar setae long, forward-directed, and divergent from one another. Postpedicel about 2.5–2.8 times the length of the pedicel. Arista larger on the basal fourth and very short pubescent stage.

Thorax: Acrostichal hairs distinct, more or less in two rows, pair pre-scutellar developed. Presuturals one; supra-alar one; post supra-alar one. Scutellum with two long pairs of setae, the apical one slightly longer than the basal one. Anepisternum with ground setulae and five long setae, inferior one longer. Katepisternum with three short discal cilia and three usual setae of 1 + 1 + 1. Fore femur with an anterodorsal and anteroventral complete row of setae; posterior surface with few setae. Fore tibia on the posterior surface with one long median seta; dorsal and ventral surfaces with long seta on the apical third; posterior surface with one preapical seta, ventral surface with one apical seta. Mid femur with one anterior supramedian seta; posterior surface with two preapical setae. Mid tibia with one median anterodorsal and one posteroventral setae, one dorsal preapical and one ventral and one dorsal apical. Hind femur with anterodorsal and anteroventral complete rows of spaced setae. Hind tibia with one anterodorsal supramedian seta, one dorsal preapical, one ventral and one dorsal apical.

Abdomen: Tergites 1 + 2 – 4 with two lateral pairs of setae; tergite 5 with a series of setae on disc and apex. Sternite 5 ( Fig. 3A ) trapezoid with many setae on all surfaces. Sternite 7 and syntergosternite 7 + 8 as in Fig. 3D .

Terminalia : Cercus is longer than wide, longer than surstylus ( Fig. 3C–D ). Surstylus long ( Fig. 3C–D ). Hypandrium tubular and long;

phallapodeme with the same diameter in all extensions ( Fig. 3C ). Pregonites are longer than postgonites ( Fig. 3C ).

Female: Similar to male, except head with a frontal row with six pairs of setae, the first and the fifth as long as ocellar seta, remaining shorter than half-length of the long ones. Ovipositor long; tergites narrow, epiproct and cerci long, with long seta on external margins; three spermathecae rounded ( Figs 3E–F ).

Material examined: Holotype male: ECUADOR: 13107. ( EC) Loja: Cajanuma Podocarpus National Park, trail Bosque Nublado, 3000m, 16/02/2009 - 20/02/2009 ( YPT). Leg. Marc Pollet & Anja De Braekeleer , sorted by Marc Pollet – sample code EC/2009-31/ MP & ADB-002 ( UTPL).

Paratypes: Same label as holotype:13107, Trail Los Miradores , 3000m, 20/02/2009 - 27/02/2009 ( YPT). sample code EC/2009-34/ MP & ADB- 004, 5♀♀ ( MNRJ); 13105, trail Bosque Nublado , sample code EC/2009-34/ MP & ADB- 002, 13♀♀ ( UTPL) , 12♀♀ ( RBINS) , 7♀♀ ( DZUP); 13063, trail Bosque Nublado , sample code EC/2009-31/ MP & ADB- 001, 3♀♀ ( UTPL); 13113, sample code EC/2009-34/ MP & AD 5-010, 2♀ ( RBINS); 13115, trail Oso de anteojos, sample code EC/2009-34/ MP & ADB- 012, 7♀♀ ( RBINS); 13154, sample code EC/2009-37/ MP & ADB- 010, 6♀♀ ( UTPL); 13155, trail Oso de anteojos, sample code EC/2009-37/ MP & ADB- 011, 4♀ ( UTPL); 13109, sample code EC/2009-34/ MP & ADB- 006, 3♀♀ ( UTPL) , 4♀♀ ( RBINS); 13064, 16/02/2009 - 20/02/2009, sample code EC/2009- 31/ MP & ADB- 002, 24♀♀ ( MNRJ); 13145, trail Bosque Nublado , sample code EC/2009-37/ MP & ADB- 001, 8♀♀ ( DZUP); 13153, sample code EC/2009-37/ MP & ADB- 009, 2♀♀ ( DZUP); 13170, trail Bosque Nublado , sample code EC/2009-37/ MP & ADB- 013, 1♀ ( UTPL) , 2♀♀ ( RBINS); 13155, trail Oso de anteojos, sample code EC/2009-37/ MP & ADB- 011, 3♀♀ ( RBINS); 13074, trail Oso de anteojos, 16/02/2009 - 20/02/2009, sample code EC/2009-31/ MP & ADB- 012, 2♀♀ ( DZUP); 13106, trail Los Miradores , 20/02/2009 - 27/02/2009, sample code EC/2009-34/ MP & ADB- 003, 4♀♀ ( UTPL) , 3♀♀ ( RBINS); 13146, trail Bosque Nublado , 27/02/2009 - 05/03/2009, sample code EC/2009-37/ MP & ADB- 002, 7♀♀ ( UTL) , 4♀♀ ( RBINS); 13104, trail Bosque Nublado , 20/02/2009 - 27/02/2009, sample code EC/2009-34/ MP & ADB- 001, 6♀♀ ( UTPL) , 5♀♀ ( RBINS); 13065, trail Los Miradores , 16/02/2009 - 20/02/2009, sample code EC/2009-31/ MP & ADB- 003, 3♀♀ ( MNRJ); 13066, trail Los Miradores , 16/02/2009 - 20/02/2009, sample code EC/2009-31/ MP & ADB- 004, 1♀♀ ( RBINS) , 9♀♀ ( MNRJ); 13106, trail Los Miradores , 20/02/2009 - 27/02/2009, sample code EC/2009-34/ MP & ADB- 003, 4♀♀ ( RBINS); 13108, trail Los Miradores , ( WPT), sample code EC/2009-34/ MP & ADB- 005, 8♀♀ ( DZUP); 13147, trail Los Miradores , 27/02/2009 - 05/03/2009, sample code EC/2009-37/ MP & ADB- 003, 2♀♀ ( UTPL) , 2♀♀ ( RBINS). Zamora Chinchipe: 13102, San Francisco, Reserva Biológica San Francisco, trail Canal , 2000m, 03º58’30’’S 79º04’25’’W, 17-25/02/2009 ( YPT), leg. M. Pollet & A. De Braekeleer , sorted by M. Pollet , sample code EC/2009-33/ MP & ADB- 015, 1♀ ( UTPL); same label as holotype, except 13144, sample code EC/2009-36/ MP & ADB- 016, 1♀ ( DZUP); 13068, trail Los Miradores , 16/02/2009 - 20/02/2009 ( WPT), sample code EC/2009-31/ MP & ADB- 006, 6♀♀ ( DZUP); 13051, sample code EC/2009-30/ MP & ADB- 003, 1♀ ( DZUP); 13050, trail Rio San Francisco , sample code EC/2009-30/ MP & ADB , 1♀ ( UTPL); 13156, 27/02/2009 - 05/03/2009, sample code EC/2009-37/ MP & ADB- 012, 6♀♀ ( DZUP) .

Etymology: The specific name is derived from the Latin word nigreos, meaning black, and refers to the dark color of the lower calypter.

Figures

Figure 3 Neodexiopsis nigrocalyptrata new species: A.Sternite 5, dorsal view; B.Cercal plate and surstylus,dorsal view; C.Cercal plate and surstylus and phallic complex, lateral view; D.Sternite 7 and syntergosternite 7 + 8, dorsal view; E. Ovipositor, dorsal view; F.Spermatheca. Scale: 0.1 mm.

Figure 6 Neodexiopsis, habitus lateral view:A.N. bicoloratta new species, male paratype;B.N. longialata new species, female paratype;C.N. nigrocalyptrata new species, female paratype; D. N. plana new species, female paratype; E. N. secunda new species, male holotype.Scale:1.0 mm.