Coenosia inusitata (Malloch, 1934)

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

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Coenosia inusitata (Malloch, 1934)


Coenosia inusitata (Malloch, 1934) View in CoL

Male (Fig. 19A).

Length. Body: 4.43-4.8 mm, wing: 4.05-4.24 mm. Head: (Fig. 19B View Figure 19 ). Frons at vertex about one third of the head width. Frons, fronto-orbital plate, parafacial and gena black with grey pollinosity; 4-5 pairs of frontal setae. Frons longer than wide, with frontal triangle long, light grey, reaching lunula. Gena higher than the width of postpedicel. Fronto-orbital plate with 1-3 setula, close to parafacialia. Antenna black, apical angle of postpedicel acute; in lateral view inserted over the mid-level of the eye; arista with its longest microtrichia shorter than its basal diameter. Thorax: (Fig. 19C View Figure 19 ). Black with grey pollinosity, with three black vitta at dorsocentral and acrosticals rows of setae; anterior and posterior spiracles grey. Chaetotaxy: acr s short and irregular, the anterior presutural acr s longer than the anterior presutural dorsocentral seta (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 with grey pollinosity, apex of femora yellow. 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 long setae on ventral surface, 2 preapical setae on pd to posterior surface; mid tibia with one ad and one pd setae on median third, ad seta shorter and positioned below pd seta. Hind femur with a complete row of ad setae and a row of anterior setae which are positioned in dorsalventral direction (Fig. 19E View Figure 19 ), with 1-2 pv seta on basal third. Similar size of claws and pulvilli of the three legs. Abdomen: (Fig. 19D View Figure 19 ). Black, with grey pruinosity, tergites 3-5 with two dark brown spots. Tergite 6 not visible in dorsal view. Sternite 5 broader than long, apical margin strong concave, with a depressed area at the base, and without membrane; setae concentrated on the lobes and some long and strong on apical margin (Fig. 19F View Figure 19 ). Terminalia: Cercus curved in lateral view, keels only on basal half, apical margin straight. Surstylus longer than broad, curved at apex, sclerotized (Fig. 19G, H View Figure 19 ). Hypandrium tubular, wider than long, distal extreme not exposing the phapod. Aedeagus with pregt developed sclerotized; pgt developed; epiphalus sclerotized, and distiph tubular, sclerotized at base, and without spine on ventral surface (Fig. 19H, I View Figure 19 ).

Female (Fig. 20A, B).

Length. Body: 4.5 mm, wing: 4.3 mm. Differs from male as follows: Legs: Hind femur without a row of anterior setae which are located descendant in dorsalventral direction. Ovipositor: Tergites 6, 7, and 8 with two long and wide sclerotized plates; epiproct triangular, with spine-like setae, shorter than cercus (Fig. 20C View Figure 20 ). Sternites 6 and 7 with one long and thin plates; sternite 8 with one thin central plate and two small and sclerotized plates each with 4-5 setae on distal margin; hypoproct triangular, setulose, with several strong setae on distal margin (Fig. 20D View Figure 20 ). Spermathecae (Fig. 20E View Figure 20 ).

Type material.

Holotype. Male; USNM [pinned, in good condition] Original lables: "Angol - Chile [printed] / 19 Sept. 1926 [handwritten]" on white paper; "USNMENT / [QR code] / 01556237" printed on white paper; "Type No. [printed] / 49881 [handwritten] / U.S.N.M. [printed]" on red paper; " Coenosia / Coenosia inusitata / Type [handwritten] / det. JRMALLOCH [printed]" on white paper, black frame.

Additional material examined.

ARGENTINA - Neuquén province • 1 female, 1 male; Alumine, Rio Alumine ; -39.234610, -70.910481; 896 m a.s.l.; 12 Jan 2013; Mulieri, Patitucci & Olea leg.; MACN GoogleMaps 4 males; Arroyo Carreri, Ruta 13; -38.885904, -70.433105; 1160 m a.s.l.; 07 Feb 2018; Olea & Patitucci leg; MACN GoogleMaps .

Distribution (Fig. 27B).

ARGENTINA: Neuquén (new record). CHILE: R. de la Araucania.


Coenosia inusitata was described by Malloch (1934) with male and female specimens from Angol, Chile. Specimens captured by LDP and PRM were collected in open areas (steppe), close to rivers. The abdomen of only female specimen collected was photographed and then removed for the dissection of the terminalia.