Coenosia ignobilis Stein, 1911

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 ignobilis Stein, 1911

Male (Fig. 17A).

Length. Body: 3.05-3.27 mm, wing: 3.00-3.10 mm. Head: (Fig. 17B ). Frons at vertex about one third of the head width. Frons, fronto-orbital plate, parafacial and gena dark brown with grey pollinosity; 3-4 pairs of frontal setae. Frons longer than wide, with frontal triangle long, light grey, reaching lunula. Gena height less than 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 with similar length than its basal diameter. Thorax: (Fig. 17C ). Black with grey pollinosity, with a dark-brown vitta along acrosticals setae and a vitta between dorsocentral and intra-alar rows of setae; anterior and posterior spiracles grey. Chaetotaxy: acr s short and irregular, the anterior presutural acr s with similar length to the eaDC; dorsocentrals 1+3, eaDC is less than one third of the aDC. Katepisternum with 2-3 setulae. Wing: Tegula black. Both calypters whitish hyaline with white margins; halter yellow. Legs: Black, apex of fore femur, basal half of mid and hind femora, and 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 5-6 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, ad seta longer and placed more apically than pd seta. Hind femur with a complete row of ad and a row of av setae on apical half, with three pv seta on basal third, apical most is the longest of the three. Similar size of claws and pulvilli of the three legs. Abdomen: (Fig. 17D ). Black, with grey pruinosity, tergites 3-5 with two dark brown spots. Tergite 6 partly visible in dorsal view. Sternite 5 broader than long, apical margin concave with a “U” shape, and with membrane; setae concentrated on the lobes and some long and strong on apical margin (Fig. 17E ). Terminalia: Cercus curved in lateral view, keels only on basal two-thirds, apical margin straight (Fig. 17F, G ). Surstylus longer than broad, wide at base and tapering towards apex, straight, sclerotized (Fig. 17H ). Hypandrium tubular, wider than long, distal extreme exposing the phapod, and with several hairs on ventral surface. Aedeagus with pregt developed and sclerotized; pgt developed; epiphalus slightly sclerotized, and distiph tubular, sclerotized at base, and with spines on lateral surface (Fig. 17G, I-J ).

Female (Fig. 18A, B).

Length. Body: 3.70-4.40 mm, wing: 3.50-4.24 mm. Differs from male as follows: Legs: Mid and hind femora more yellow, hind tibia with one long ad, one short av, and one long pd setae on middle third. Ovipositor: Tergites 6, 7, and 8 with two long and wide sclerotized plates; epiproct triangular, with hair-like setae, shorter than cercus (Fig. 18C ). Sternites 6 and 7 with one long and wide plate; sternite 8 with one central plate and 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. 18D ). Spermathecae (Fig. 18E ).

Type material.

Paratype. Male; ZMUH [pinned, in good condition]. Original labels: "PARALECTOTYPE ♂ / Coenosia / Coenosia ignobilis / Stein, 1911 / Des.A.C. Pont 1999" printed, on white paper; " Coenosia / Coenosia ignobilis / Typo Stein" handwritten, on white paper; “Type” printed on red paper; "Chile [printed] / 20.IX.02 [handwritte] / Quillota [printed]" on green paper.

Additional material examined.

ARGENTINA - Chubut province • 2 females; PNLA, Cabana La Cascada ; -42.888499, -71.592376; 532 m a.s.l.; Feb 2013; Mulieri, Patitucci & Olea leg.; MACN • 5 females, 5 males; PNLA, Seccional Lago Verde ; -42.718803, -71.727470; 538 m a.s.l.; Oct 2014; Mulieri & Patitucci leg.; MACN • 1 female; PNLA, Puerto Mermoud ; -42.723248; -71.748801; 521 m a.s.l.; 25 Oct 2014; Torretta leg.; MACN • 3 males; PNLP, Gendarmería; -42.097468, -71.681953; 200 m a.s.l.; 07-11 Jan 2012; Mulieri & Patitucci leg.; MACN • 1 male; PNLP, Intendencia ; -42.085077, -71.614662; 195 m a.s.l.; 16 Jan 2011; Mulieri & Patitucci leg.; MACN • 1 female, 9 males; PNLP, La Playita ; -42.099032, -71.607425; 205 m a.s.l.; 09 Jan 2012; Patitucci leg.; MACN • 1 female; PNLP, Rio Azul ; -42.0916, -71.6155; 184 m a.s.l.; 17 Jan 2011; Mulieri & Patitucci leg.; MACN • 2 females; PNLP, Rio Turbio ; -42.228541, -71.666482; 204 m a.s.l.; 12 Jan 2011; Mulieri & Patitucci leg.; MACN . - Neuquén province • 1 female; Cerro Chapelco ; -40.197050, -71.298453; 1400 m a.s.l.; 15 Feb 1983; M. Gentili & P. Gentili leg.; IFML • 4 females, 1 male; San Martín de los Andes, Truran Kura ; 1000 m a.s.l.; 27 Sep 1986; M. Gentili & P. Gentili leg.; IFML . - Río Negro province • 3 males; PNNH, Lago Guillelmo ; -41.358807, -71.515071; 833 m a.s.l.; 14 Sep-01 Oct 2008; Garré & Montes de Oca leg.; MLP; Malaise . CHILE - Región de la Araucanía • 1 female; Angol ; -37.7800, -72.7500; 15 Sep 1926; JR Malloch det.; SM Lopes leg. MNRJ .

Distribution (Fig. 27G).

ARGENTINA: Chubut (new record), Neuquén (new record), Río Negro. CHILE: Arch. Juan Fernandez, R. de la Aruacania, R. de Valparaiso.

Remarks.

Stein (1911) described Coenosia ignobilis with male and female specimens from Chile. Later, Malloch (1934) studied a large series of male and female specimens from Argentina and Chile, presented a brief description, and considered it as part of Austrocoenosia . Later, Couri and Albuquerque (1979) observed a female specimen from the series of specimens studied by Malloch (op. cit), and included the species as part of the genus Neodexiopsis . Pont (2001) designated lectotypes and paralectotypes and established the original combination Coenosia ignobilis . Recently, Couri and Pont (2020) presented a redescription of the paralectotype housed in ZMUH.

Figures

Figure 17. Coenosia ignobilis, 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, G cercus, surstylus and phallic complex, lateral view, H detail of surstylus, distal tip (SEM), I phallic complex, lateral view, J detail of phallic complex, distal tip (SEM). Scale bar: 1 mm (A), 0.5 mm (B-G), 0.05 mm (H), 0.1 mm (I-J). Hairs on ventral surface of hypd and spines on lateral surface of distiph - red arrows.

Figure 18. Coenosia ignobilis, female. A Lateral view, B head, frontal view, C ovipositor, dorsal view, D ovipositor, ventral view, E spermathecae. Scale bar: 1 mm (A), 0.5 mm (B-D), 0.1 mm (E).