Coenosia patagonica, Patitucci & Mulieri & Couri & Domínguez, 2023

Patitucci, Luciano Damian, Mulieri, Pablo Ricardo, Couri, Marcia Souto & Dominguez, Martha Cecilia, 2023, Phylogeny of the old and fragmented genus Austrocoenosia Malloch reveals new evidences on the morphology and evolution of the genera Coenosia Meigen and Neodexiopsis Malloch (Diptera: Muscidae), Arthropod Systematics & amp; Phylogeny 81, pp. 611-653 : 611

Coenosia patagonica sp. nov.

Male (Fig. 24A).

Length. Body: 3.75-4.2 mm, wing: 3.70-4.0 mm. Head: (Fig. 24B ). Frons at vertex about one third of the head width. Frons, fronto-orbital plate, parafacial and gena black with grey pollinosity; 3-4 pairs of frontal setae. Frons longer than wide, with frontal triangle long, light brown, reaching lunula. Gena height similar to the width of postpedicel. Fronto-orbital plate with 3-5 little setulae, close to parafacialia. Antenna black, apical angle of postpedicel acute; in lateral view inserted at the mid-level of the eye; arista with its longest microtrichia shorter than its basal diameter. Thorax: (Fig. 24C ). Black with grey pollinosity, with two thin dark-brown vitta at dorsocentral rows of setae; anterior and posterior spiracles grey. Chaetotaxy: acr s short and irregular, the anterior presutural acr s with similar length to the extra anterior presutural dorsocentral seta (eaDC); dorsocentrals 1+3, eaDC is less than one third of the aDC. Katepisternum with 1-2 setulae. Wing: Tegula yellow. Both calypters whitish hyaline with white margins; halter yellow. Legs: Coxae grey. Fore femur grey with apical tip yellow, mid and hind femora yellow with a black apical ring or a dorsal band. Tibiae yellow. Tarsus black. Fore femur with a row of strong pd, a row of strong pv setae, and a row of av setae at basal third. Mid femur with 4-5 setae on anterior surface on basal half, 2-3 pv and 2-3 av setae on basal third, 2 preapical setae on pd to posterior surface; mid tibia with one ad and one pd median setae, with similar length, ad positioned below of the pd seta. Hind femur with a complete row of ad and a row of av setae, with 2-3 pv setae on basal third. Similar size of claws and pulvilli of the three legs. Abdomen: (Fig. 24D ). Black, with grey pruinosity, tergites 1+2-5 with two dark brown spots. Tergite 6 not visible in dorsal. Sternite 5 broader than long, apical margin concave with a “U” shape, with a depressed area at the base, and without membrane; setae concentrated on the lobes and some long and strong on apical margin (Fig. 24E ). Terminalia: Cercus curved in lateral view, keels present at basal half, apical margin little concave. Surstylus longer than broad, narrowing towards the apex, straight, sclerotized (Fig. 24F-H ). Hypandrium tubular, wider than long, with several spines on ventral surface. Aedeagus with pregt developed sclerotized; pgt developed; epiphalus long and not sclerotized, and distiph tubular, sclerotized at base, and without spine on ventral surface (Fig. 24H, I ).

Female (Fig. 25A, B).

Length. Body: 3.95-4.40 mm, wing: 3.55-4.10 mm. Differs from male as follows: Thorax: Chaetotaxy: acr s long and irregular, the anterior presutural pair longer than the anterior presutural dorsocentral seta. Katepisternum with 6-8 setula. Ovipositor: Tergites 6 and 7 with two long and thin sclerotized plates, tergite 8 with two long and wide sclerotized plates; epiproct triangular, with hair-like setae, shorter than cercus (Fig. 25C ). Sternites 6 and 7 with one long and wide plate; sternite 8 with two small, linear, and sclerotized plates each with 4-5 setae on distal margin; hypoproct triangular, setulose, with several strong setae on distal margin (Fig. 25D ). Spermathecae (Fig. 25E ).

Type material examined.

Holotype. Male; MACN [pinned]. Original labels: "Arg. Chubut Parque Nacional / Lago Puelo ( Gendarmería Malaise) / 42°05,947'S 71°40,937' W / I-2012 Mulieri & Patitucci leg." print. on white paper; "MACN-Ent / 34730" print. on white paper, black frame; “Holotype” print. on red paper, black frame. Paratypes. Four females, 5 males; MACN [pinned]. Original labels: "Arg. Chubut Parque Nacional / Lago Puelo ( Gendarmería Malaise) / 42°05,947'S 71°40,937' W / I-2012 Mulieri & Patitucci leg." print. on White paper; "MACN-Ent / 34731 [to] 34739" print. on white paper, black frame; “Paratype” print. on red paper, black frame (MACN). Paratypes. One female and 1 male; MLP [pinned]. Original labels: "Arg. Neuquén, Villa Pehuenia / 1187 m a.s.l. Malaise / -38.884503, -71.166194 / 9/11.II.2018 Mulieri leg." Print. on white paper, “Paratype” print. on red paper, black frame. One female; MLP [pinned]. Original labels: "Arg. Río Negro, PNN Huapí / Mallín Playa negra 797 m / -41,357809, -71,571683 / 19/I-05/II/2009 / Garré & M.de Oca leg. / ARG.DWN-280 / Malaise trap. MLP" print. on white paper, “Paratype” print. on red paper, black frama. Paratypes. Two females; IFML [pinned]. Original labels: "R. Argentina / Neuquén / Truran Kura / 8 km NW S.M. de los / andes- 1.000 m.s.n.m. / 18/X/1986 / col. M. y P. Gentili" print. on white paper, black frame; "Trampa / Malaise" print. on white paper; “Colección / Inst. Fund. M. Lillo / (4000) S.M. de Tucumán / Tucumán - Argentina" print. on green paper; “Paratype” print. on red paper, black frame. 4 females, pinned, labels: "R. Argentina / Neuquén / Truran Kura / 8 km NW S.M. de los / andes- 1.000 m.s.n.m. / 25/X/1986 / col. M. y P. Gentili" print. on white paper, black frame; "Trampa / Malaise" print. on white paper; “Colección / Inst. Fund. M. Lillo / (4000) S.M. de Tucumán / Tucumán - Argentina" print. on green paper; “Paratype” print. on red paper, black frame. 1 female, IFML [pinned]. Original labels: "R. Argentina / Santa Cruz /Lago Argentino / Brazo Rico / 12-19-II-1980 / col. A. Willink" print. on white paper, black frame; "Trampa / Malaise" print. on white paper; “Colección / Inst. Fund. M. Lillo / (4000) S.M. de Tucumán / Tucumán - Argentina" print. on green paper; “Paratype” print. on red paper, black frame.

Additional material examined.

ARGENTINA - Chubut province • 2 females, 13 males, PNLA, Cabana La Cascada ; -42.888499, -71.592376; 532 m a.s.l.; Feb 2013; Mulieri, Patitucci & Olea leg.; MACN . - Neuquén province • 2 males; Las Ovejas ; -36.992243, -70.749499; 1262 m a.s.l.; 13 Feb 2018; Compagnucci & Patitucci leg.; Malaise trap; MACN • 2 females, 1 male; PNL, Ñorquinco; -39.146931, -71.232717; 1070 m a.s.l.; 09 Jan 2013; Mulieri, Patitucci & Olea leg.; MACN .

Distribution (Fig. 27C).

ARGENTINA: Chubut (new record), Neuquén (new record), Río Negro (new record), Santa Cruz (new record).

Remarks.

Coenosia patagonica sp. nov. is distinguished from its congeners by the coloration of its legs and its chaetotaxy. In addition, the male cercus has keels present at the basal half and the apical margin little concave, and surstylus longer than broad, whereas the female ovipositor is in tergite 8 with two long and wide sclerotized plates. In Stein’s key (1911), C. patagonica comes close to Coenosia rotundiventris Stein 1911, but differs in the coloration of legs. In Malloch’s key (1934), C. patagonica comes close to C. ignobilis Stein, 1911, but the coloration of the hind femur and the male terminalia can separate it from the latter.

Figures

Figure 24. Coenosia patagonica sp. nov. male. A Lateral view, B head, frontal view, C thorax, dorsal view, D abdomen, dorsal view, E fifth sternite, F cercus and surstylus, dorsal view (SEM), G cercus and surstylus, dorsal view, H cercus, surstylus and phallic complex, lateral view, I phallic complex, lateral view. Scale bar: 1 mm (A), 0.5 mm (B-D), 0.2 mm (E-H), 0.05 mm (I). Hypandrium, spicules on ventral surface - red arrows.

Figure 25. Coenosia patagonica sp. nov., female. A Lateral view, B head, frontal view, C ovipositor, dorsal view, D ovipositor, ventral view, E spermathecae. Scale bar: 1 mm (A), 0.2 mm (B), 0.5 mm (C, D), 0.1 mm (E).