Argentinomyia pollinosa ( Hull, 1942 )

Montoya, Augusto L. & Wolff, Marta, 2023, Taxonomic revision of the Neotropical genus Argentinomyia Lynch-Arribálzaga, 1891 (Diptera: Syrphidae), with description of 16 new species, Zootaxa 5234 (1), pp. 1-157 : 106-108

Argentinomyia pollinosa ( Hull, 1942)

( Figs 63 , 64 and 93B )

Rhysops pollinosa Hull, 1942: 10 . Type locality: Brazil. S„o Paulo , Batea, xi.1940, J. Lane coll. HOLOTYPE Female CNC. Refs.: Fluke, 1945: 26 ( Fig. 11 , head, lateral view, female); 1957: 279 (Figs 113–114, male genitalia); Marinoni & Thompson, 2004: 567

Rhysops pollinosa . Fluke, 1945: 26

Rhysops pollinosa . Fluke, 1957: 266

Rhysops pollinosus . Thompson, 1976: 44 Rhysops pollinosa . Cooper & Cumming, 1993: 70

Argentinomyia pollinosa . Marinoni & Thompson, 2004: 567

Argentinomyia pollinosus . Morales & K̂hler, 2008: 44

Type material. HOLOTYPE. Adult female, BRAZIL. S„o Paulo, 23°32’56.34”S, 46°38’19.98”W, 801 m, 1.xi.1940, J. Lane (Hull Collection)

Length (n= 3): Body, 8.5–9.0 mm; Wings, 6.7–7.5 mm.

Diagnosis. Female frontal triangle with two rounded brown pollinose maculae; 3 rd to 4 th terga with triangular maculae; metatibia yellow on basal 1/4; metafemur yellow with a black ring or smudge on apical margin; surstylus in lateral view with dorsal and ventral margins approximately of the same width in the whole length; hypandrium in ventral view expanded laterally towards the apex.

Redescription. MALE. Head ( Fig. 63A ): Frontal triangle and vertex subopaque black, the former broadly divided transversely by yellowish-brown pollen. Face pale greyish-yellow, almost white pubescent and with a similar pile. Face with a broad, shining, brownish-black middle vitta and a submedial, incomplete vitta partly bisecting the facial pubescence. Face with four transverse grooves; the pile of frontal triangle and vertex black. Frontal triangle black, brownish pollinose, pile black. Gena bluish-black, antennae yellowish. Ocellar triangle black, with black pile. Occiput pile fine, short and yellow. Antennae yellowish, short, ratio 1.1:1.0:2.2, scape and pedicel little longer than basoflagellomere; darker toward the end and dorsal on basoflagellomere; arista yellow at base and dark on apical third, pilose. Thorax ( Figs 63B–C , 64D ): Aeneous, mesonotum shining bright brassy-black with obscure, brownish pollinose vittae; with a pair of moderately separated vitta of light brownish yellow pollen, yellow pilose. Pleura grey brownish to rusty-colored pollen, yellow pilose. Scutellum with a pair of slender, pale bristles; fringe short and yellow. Wing ( Fig. 63C ): Hyaline, slightly tinged with brown near the apex, stigma dark yellowish-brown; microtrichose, except cell c bare on basal 1/4, cell bm bare on basal 3/4 and cell r bare on basal 4/5, cell cua bare on anterior 1/3; calypter wholly white-yellowish; plumula white, halter yellow, capitulum slightly brown yellow. Legs ( Fig. 63C ): Everywhere light orange-brown; metafemur yellow except the apical 1/5 narrowly brown; basal three protarsus brown, the apical one yellow-orange; another tarsus yellow; yellow to orange pilose. Abdomen ( Figs 63B ): Elongate, 1 st tergum shining black, 2 nd shining blue-black with an obscure, diffuse, brownish-orange, elongate, sublateral maculae along the outer portion of tergum; widely separated and equidistant from base and apex of 2 nd tergum; on 3 rd tergum with quite similar, slightly smaller maculae that begin at the base; on 4 th tergum with smaller and similar basal maculae; sterna yellowish; male genitalia: surstylus in lateral view ( Fig. 64A ) with dorsal margin slightly concave and ventral margin slightly convex, shorter than broad; hypandrium in ventral view ( Fig. 64C ) narrowed laterally towards the apex; aedeagal lobe in ventral view ( Fig. 64C ) with apex acute.

FEMALE ( Figs 63D–F ). Similar to male except for usual sexual dimorphism and differing in Frontal triangle with a broad, brownish pollinose crossband occupying the frontal depression; between this band and the ocelli a somewhat narrow.Abdomen with a broad lateral macula, reaching 1/4 of segment length; on 3 rd to 4 th terga, there are a pair of lineal maculae, apically rounded and separated for the edge, reaching the anterior 2/3 of the segment length.

Taxonomic notes. Argentinomyia pollinosa is similar in appearance to A. maculata differing from them by the female frontal triangle with a complete transverse black fascia ( Figs 63D, F ); metafemora yellow except the apical 1/5 narrowly brown; metatibiae yellow on basal 1/4 ( Figs 63A, C, D, F ); 3 rd to 4 th terga with quadrate maculae ( Figs 63B, E ). In A. maculata the female frontal triangle with two rounded brown pollinose maculae ( Figs 49D, F ); metafemora yellow with a black ring or smudge on apical margin; metatibiae mostly yellow ( Figs 49A, C, D, F ); 3 rd to 4 th terga with triangular maculae ( Figs 49B, E ) (see “diagnosis” under each species or key).

Geographical range. Argentinomyia pollinosa (n= 37) is known from Argentina (Tucumán) in Serra do Mar, Serra da Fartura and Serra de Mantiqueira in Brazil (Minas Gerais, Paraná: Ponta Grossa, Guarapuava, Refugio de Vida Silvestre dos Campos de Palmas , S „o José dos Pinhais; Santa Catarina, S„o Paulo) and Eastern slope of Cordillera de Mérida in Venezuela * (Aragua) ( Fig. 93B ). The species is present at low and middle altitudes (400– 2150 m) in the following biogeographical domains and provinces: Northern Andes : Venezuelan (500 m); Paraná (400–2150 m): Araucaria Forest (895–1274 m), Atlantic Forest (801–2150 m) , Paraná Forest (400 m) ; Chacoan: Chaco (915–1430 m).

Non-type material examined. ARGENTINA . Tucumán, Burruyacu, Villa Padre Monti , -26.488779, - 64.971602, 915 m, 5.ii.1948, R. A. Golbach (5♁, 5♀, WIRC) ; Villa Nougués , -26.850000, -65.383331, 1430 m, i.1931, R. K. (3♁, WIRC) . BRAZIL. Santa Catarina, Nova Teutonia, -27.183334, -52.383334, 300-500 m, 7.i.1960, F. Plaumann (6♀, USNM ENT 01406583 ; 01406575; 01406444; 01406570; 01406439; 01406420); Minas Gerais, 16 Km a SE de Itamonte Pq Nac Itamonte, -22,368504, -44,778372, 2150 m, 26.v.2011, M. G. Hermes (3♀ CEUFLA) ; Paraná, Ponta Grossa, Pq Estadual de Vila Velha-IAPAR, -25,246336, -50,02104, 895 m, 12.vi.1999, N. G. Ganho and R. C. Marinoni (1♁, 1♀, DZUP 42302 , 42088 ) ;- 25,1, -50,1, 969 m, 26.i.1987, PROFAUPAR (1♀, DZUP 43089 , Det. L. Marinoni) ; Guarapuava, Estância Santa Clara , -25,3833, -51,45, 1098 m, 10.vi.1986, PROFAUPAR (1♀, DZUP 43087 , Det. L. Marinoni) ; Refugio de vida silvestre dos campos de Palmas , -26,533807, -51,599362, 1200 m, A. Couto (4♀, DZUP) ; São José dos Pinhais, BR 277- Km. 54 (TELEPAR) -25,5667, -49,0167, 1050 m, 25.vii.1988, PROFAUPAR (4♁, 6♀, DZUP 43147 , 43095 , 43096 , 43148 , 43155 , 43151 , 43092 , Det L. Marinoni); 22.xii.1986 (1♀, DZUP 43093 ) ; Santa Catarina, Nova Teutonia , -27,183334, -52,383334, 400 m, 29.vii.1938, F. Plaumann (3♁, 2♀, BMNH) . VENEZUELA. Aragua, Rancho Grande , 10.066783, -67.543343, 500 m, 8-11.vi.1976, A.S. Menke and D. Vincent (1♀, USNM ENT 01443779 ) .

Figures

FIGURE 11. Argentinomyia agonis (Walker, 1849), male genitalia. A. Whole genitalia including epandrium, cercus and surstylus, lateral view; B. Epandrium, dorsal view; C. Hypandrium, ventral view.Abbreviations used in male genitalia structures are as follows: Ahp = apex of hypandrium (superior lobes); Cer = Cercus; Epd = Epandrium; Hyp = Hypandrium; Led = Aedeagal lobe; Sur = Surstyle. Scale bar: 0.05 mm. D–E. Natural habitus of male and female specimens in Puerto Villamil, Galapagos, Ecuador (iNaturalist catalogue number37254474; https://www.inaturalist.org/observations/37254474). Photo taken by ©Robert Siegel.

FIGURE 49. Argentinomyia maculata (Walker, 1852), male (USNM ENT 01406339): A. Head, frontal view (Detail of black ring or smudge on apical margin of metafemur); B. Detail of triangular maculae, dorsal view; C. Lateral view. Female (USNM ENT 01406336): D. Head, frontal view; E. Detail of triangular maculae, dorsal view; F. Lateral view. Scale bars: 5 mm.

FIGURE 63. Argentinomyia pollinosa (Hull, 1942), male (USNM ENT 01406570): A. Head, frontal view; B. Dorsal view; C. Lateral view. Female (USNM ENT 01406570): D. Head, frontal view; E. Dorsal view; F. Lateral view. Scale bars: 5 mm.

FIGURE 64. Argentinomyia pollinosa (Hull, 1942), male genitalia. A. Whole genitalia, lateral view; B. Epandrium, dorsal view; C. Hypandrium, ventral view. Scale bars: 1 mm. D. Natural habitus of a male specimen in Mozart 424, San Carlos de Bariloche, Río Negro, Argentina (iNaturalist catalogue number 37828673; https://www.inaturalist.org/observations/37828673). Photo taken by ©Paula Zermoglio.

FIGURE 93. Geographical distribution of Argentinomyia species in the North Andes and southeastern South America.