Antrops nitidicollis (Becker) KITS & MARSHALL, 2013

KITS, JOEL H. & MARSHALL, STEPHEN A., 2013, <p class = " HeadingRunIn " align = " left "> <strong> Generic classification of the Archiborborinae (Diptera: Sphaeroceridae), with a revision of <em> Antrops </ em> Enderlein, <em> Coloantrops </ em> gen. nov., <em> Maculantrops </ em> gen. nov., <em> Photoantrops </ em> gen. nov., and <em> Poecilantrops </ em> gen. nov. </ strong> </ p>, Zootaxa 3704 (1), pp. 1-113 : 61-62

Antrops nitidicollis (Becker) , comb. nov.

( Figs. 14 , 114–118 , 216 )

Olina nitidicollis Becker 1920: 184

Archiborborus nitidicollis: Comb. Richards 1967: 3

Archiborborus orbitalis var. latifrons Duda : 143: Syn. Norrbom in Roháček et al. 2001: 22.

Description. Head blackish brown, interfrontal plates, suture between gena and postgena, and a median band on gena black, with striated microsculpture. Occiput covered with microtomentum, dorsal margin of microtomentum below level of postocellar bristles, face with a thin band of microtomentum below base of antenna and across lunule, frons and gena shiny. Ocellar bristles just anterior to median ocellus. Subvibrissal and anterior genal bristles about 0.25X length of vibrissa. Gena about 0.8X eye height.

Thorax blackish brown. Mostly shiny, with microtomentum only on laterotergite. Acrostichal setae in 2 rows. Halter brown.

Legs blackish brown, shiny. Mid tibia with 1 anteroventral, 1 posteroventral, 6 apical bristles. Hind tibia with 1 anteroventral bristle just distal to half, 2 ventroapical bristles. The ventroapical bristles are separated by an unmodified seta and may represent the first and third ventroapical bristles found in other groups.

Wing clear, with reduced microtrichia at base.

Abdominal tergites blackish brown, heavily sclerotized. Syntergite 1+2 with microtomentum on basal half, extending in middle to or near posterior margin, tergite 3 with microtomentum on basal third sometimes extending posteriorly in middle, tergites 4–5 shiny, sternites shiny. Male without setae on pleural membrane, female with setae and sclerotized bases on sides of segments 3–5.

Male postabdomen: Sternite 5 as described for the species group. Surstylus with medial ridge thin, projecting past anterior edge, at about same level as posterior cleft, ventral tooth narrow, anteroventral corner smoothly rounded ( Fig. 115 ). Pregonite indistinct, fully fused with postgonite. Postgonite with lobes barely separated, anterior lobe quadrate, posterior lobe pointed, long, with a narrow tab projecting from medial face. Basiphallus narrow, with long epiphallus and preepiphallus. Distiphallus with small, setose dorsal knob ( Fig. 114 ).

Female postabdomen: Tergites 6–7 and sternites 6–7 wider than long, moderately sclerotized, covered with microtomentum. Tergites with 3 posterior strips, sternites with 2 posterior strips. Tergite 8 shiny, widest anteriorly, posterior margin emarginated medially, anterior corners nearly meeting sternite 8 laterally. Epiproct with very short, broad anterior arms, covered with microtomentum except arms, with 2 pairs of setae ( Fig. 116 ). Cerci narrow. Sclerites of sternite 8 narrow anteriorly, becoming gradually wider posteriorly, microtomentum covering posterior quarter, apices pointed but without hooks. Hypoproct depressed and emarginated antero-medially ( Fig. 117 ). Spermathecae round, apical invagination meeting basal invagination, sclerotized duct about half as long as spermatheca ( Fig. 118 ).

Type material. Olina nitidicollis : Lectotype ♂ (by present designation): ECUADOR: [Carchi:] Tulcán, 1902, G. Rivet ( MNHN; examined). The specimen is double-mounted (minuten in a strip of card) and is in good condition. A red lectotype label has been added to the pin . Paralectotype: ECUADOR: [Carchi:] El Angel , 3000m, 1903, P. Rivet ( MNHN) .

Archiborborus orbitalis var. latifrons : Holotype ♂: PERU: [Cuzco:] Cuzco , 22 Mar 1905, 3500 m ( SMTD; examined).

Other material examined. COLOMBIA: Nariño: Pasto , 2700 m, Solanum andigenum , 9 Dec 1955, L. Posada (7 ♂, 2 ♀, USNM) . ECUADOR: Azuay: Cuenca , 28 km S, 2500–2800 m, 15 Mar 1965, L.E. Peña (1 ♂, CNCI) ; Tarqui , 2800 m, 16 Mar 1965, L.E. Peña (1 ♂, CNCI) ; as above but 7–8 Mar 1965 (5 ♂, 1 ♀, CNCI) ; Carchi: Cerro Chiles , 3200–3300 m, 26–27 Jun 1965, L.E. Peña (1 ♂, CNCI) ; El Ángel , 2700 m, 23–25 Jun 1965, L.E. Peña (2 ♂, CNCI) ; Cañar: El Tambo, 2800 m, 4–7 Mar 1965, L.E. Peña (1 ♂, CNCI) ; Chimborazo: Tixán , 8 mi NE Alausí, 2800 m, 14 Feb 1955, E.I. Schlinger & E.S. Ross (4 ♂, 4 ♀, CASC, USNM) ; Cotopaxi: Latacunga , 45km NNE, 3700 m, shrub grass páramo, carrion traps, 19–25 Jul 1985, S. & J. Peck (1 ♂, DEBU) ; Napo: Papallacta , 10500 ft, 29 Jan 1958, R.W. Hodges (1 ♀, USNM) ; Pichincha: Cotocollao , 10000', 27 Apr 1958, R.W. Hodges (1 ♂, USNM) ; Cotopaxi Natl. Pk., Quebrada Mishahuaicu , 3600 m, along stream, pan traps, 26 Oct–8 Nov 1999, S.A. Marshall (6 ♂, DEBU) ; Pichincha Pk. , 4 km W Aloag, 3000 m, pasture at ravine edge, carrion trap, 19–25 Jul 1985, S. & J. Peck (45 ♂, 20 ♀, DEBU) ; Quito, 10 km NW, Valley nr. Hostería San Jorge , stream valley, sweeping, 23 Oct 1999, S.A. Marshall (1 ♂, DEBU) ; as above but 3000 m, pans in grasspile (3 ♂, DEBU) .

Comments. This species was described from two male specimens from Ecuador. A. Norrbom located and borrowed these syntypes from the MNHN (labelled as this species by Becker, although not explicitly marked as types) and allowed us to examine them. The specimen from Tulcán has the surstyli visible and it is designated as the lectotype to clarify the application of this name. The genitalia of the paralectotype are not visible and we did not dissect the specimen, so its identity is unconfirmed .

The type of A. latifrons is the only specimen of this species known from Peru, but the genitalia match specimens from Ecuador closely. Little material of this group was available from Peru, and this species may prove to be more widespread there; alternatively, the locality could be incorrect although we have no other evidence to suggest this is the case.

Figures

FIGURES 13–18. Archiborborine wings: (13) Antrops annulatus; (14) A. nitidicollis; (15) A. tetrastichus; (16) Coloantrops daedalus; (17) Maculantrops hirtipes; (18) Poecilantrops stellans.

FIGURES 109–118. Antrops terminalia. A. mucarensis: (109) male, phallus, postgonite, and phallapodeme, lateral view, (110) male, surstylus, anterior view, (111) female, tergite 8, epiproct, cerci, (112) female, sternite 8, lateral margins of tergite 8, hypoproct, (113) female, spermathecae; A. nitidicollis: (114) male, phallus, postgonite, and phallapodeme, lateral view, (115) male, surstylus, anterior view, (116) female, tergite 8, epiproct, cerci, (117) female, sternite 8, hypoproct, (118) female, spermathecae.

FIGURES 213–221. Antrops distribution maps. (213) A. cochabamba (circles), A. juninensis (stars); (214) Antrops cotopaxi; (215) A. eurus (circles), A. versabilis (stars); (216) A. nitidicollis; (217) A. yungas; (218) A. cochinoca (circles), A. mucarensis (stars); (219) A. orbitalis (circles), A. tumbrensis (stars); (220) A. pecki; (221) A. guandera (stars), A. tetrastichus (circles).