Tabanus glaucus Wiedemann, 1820

Dutra, Maria Carolina Pimenta, Amorim, Dalton De Souza & Carmo, Daniel Dias Dornelas Do, 2025, Taxonomic revision of the Tabanus nebulosus species group (Diptera: Tabanidae), Zootaxa 5588 (1), pp. 1-48 : 13-15

Tabanus glaucus Wiedemann

( Figs 26 A–D , 27 A–D , 28 )

Tabanus glaucus Wiedemann, 1819: 42 (list of species); 1821: 69 (list of species); Kertész, 1908: 234 (cat.; as syn. of T. cinerarius Wiedemann, 1828 ); Fairchild, 1967a: 97 (Wiedemann types), 1971: 94 (cat.); Moucha, 1976: 111 (cat.); Fairchild, 1984: 21, fig. 20, map 4 (rev.); Fairchild & Burger, 1994: 138 (cat.); Coscarón & Papavero, 2009b: 131 (cat.); Lima et al., 2015: 6 (list of species); Krolow & Henriques, 2017: 4 (list of species); Krolow et al., 2017: 111, table 2 (list of species); Henriques & Krolow, 2020; 440 (list of species); Henriques et al., 2023: Supplemental table (Amazon biogeography).

Tabanus cinerarius Wiedemann, 1828: 121 ; Walker, 1854: 212 (list of species); Hunter, 1901: 140 (cat.); Kertész, 1908: 234 (cat.); Lutz, 1928: 62, pl. 9, fig. 9 (list of species); Kröber, 1931b: 59, fig. 9 (tax.), 1934: 270 (cat.; Chelommia ); Pechuman, 1942: 55 (list of species; Chelommia ); Fairchild, 1967a: 96, 98 (list of species); Contreras-Lichtenberg, 2002: 197 (list of species).

Tabanus tenens Walker, 1850b : lxv (preocc. Walker, 1850a); Walker, 1854: 213 (list of species.); Fairchild, 1956: 29 (syn. list).

Tabanus confligens Walker, 1854: 326 (nom. nov. for T. tenens Walker, 1850 ); Kertész, 1908: 236 (cat.); Fairchild, 1956: 13 (syn.); Fairchild & Aitken, 1960: 7 (list of species).

Tabanus grandis Kröber, 1931a: 68 , fig. l ( Tabanus (Straba) ; preocc. Szilády, 1923); Kröber, 1934: 297 (cat.; Tabanus (Straba )); Fairchild, 1967b: 371 (list of species).

Distribution: Trinidad, eastern Colombia, Venezuela, Peru, eastern Bolivia, Brazil (Roraima, Pará, Maranhão, Paraíba, Rondônia, Acre, Amazonas, Pará, Mato Grosso, Tocantins, Bahia, Distrito Federal, Minas Gerais (new record), Mato Grosso do Sul, São Paulo, Rio de Janeiro).

Type-locality: “ Brazil ”

Diagnosis: Large specimens (18.7–23 mm). Frons narrow (FI: 4.7–5.8), divergent at base or nearly parallel (DI: 0.82–1.05); palpus mostly covered with black setulae. Wing brown infuscated, costal cell orange, never with a cloud on the fork of vein R 4+5. Scutum and scutellum with integument black and gray pruinosity. Femora black or at least darker than the tibiae. Abdomen orangish-brown, nearly always with a black dorsomedial integumental stripe (tergite 1 to 2 or sometimes more), dorsomedial pale triangles (tergite I to VI) and dorsolateral spots (tergite I to VI) of yellow or orange setulae when well-preserved.

Remarks: T. glaucus resembles T. nebulosus , differing by having a darker integument on the scutum, scutellum, and femora, a parallel or divergent frons at the base, wing brown infuscated with an orange costal cell, and never with a brownish cloud in the fork of vein R 4+5, abdomen usually presenting a black integumental stripe on the first two segments, dorsomedial triangles narrow and dorsolateral spots. T. nebulosus usually has lighter integument on the scutum, scutellum, and femora, frons almost always convergent at the base, wing with light brown clouds at crossveins and in the fork of vein R 4+5, costal cell hyaline or at most pale yellow, abdomen rarely have an integumental stripe on the first tergites, dorsomedial triangles broader and fainter, dorsolateral spots broader and rarely connected. The male is similar to the female, except for the reduced mouthparts, slender antenna lacking the ventral angle found in females, holoptic eyes with the facets well-demarcated, the largest ones occupy the the upper half of the eyes and are lighter than the smaller ones. This species has a wide distribution in South America and this is the first record for the state of Minas Gerais.

Examined material: BRASIL, Tocantins, Pq. Estadual do Lajeado , 10º10’02”S 48º10’34”W, xii.2017, Arm. Malaise em igarapé [malaise trap at river], G. Amora & J.O. Silva cols. [1♀] [ INPA] ; BRASIL, Pará, Óbidos, Colônia São Tomé, 01º50’46”S 55º02’23”W / 1–11.ix.2001, J.A. Rafael & J.F. Vidal, Malaise [1♀] [ INPA] ; BRASIL, Amazonas, Humaitá, Rio Ipixuna , 07º31’18”S 63º20’49”W, x.2014, Arm. Malaise, JA Rafael, FF Xavier-Fº, RM Vieira & RH Aquino [1♀] [ INPA] ; BRASIL, AM [Amazonas], Benjamin Constant, 4º25’3.96”S 70º3’37.73”W, Malaise em floresta [malaise trap at florest], x.2019, F. Xavier leg. [1♀] [ INPA] ; BRASIL, Rondônia, Ariquemes, Rio Ji-Paraná , 28.x1986 / 09°44’S 61°52’W, JA Rafael, Arm. Malaise [1♀] [ INPA]; BRASIL, Mato Grosso, Chapada dos Guimarães , 800m altitude, 18–26.xi.1983, Elias Binda / Campo Aberto, Armadilha Suspensa [canopy trap], 2 metros / Polo Noroeste [blue label] [Photographed] [1♂] [ INPA]; Utiariti, Rio Papagaio, Mt [Mato Grosso, BRASIL], x.1966, Lenko & Pereira [1♀] [ MZUSP]; BRASIL, MG [Minas Gerais], Perdizes, EDPA Galheiro, casa 4, 19º12’34” S 47°8’21” W, 15–29.i.2020, Capellari, Riccardi & Pirani, leg [3♀] [ MZUSP]; BRASIL, MG [Minas Gerais], Uberlândia, P.E. Pau Furado, Rio Araguari , 18º48’23”S 48°9’57”W, Malaise, 19.xi.2019 – 12-i.2020, RS Capellari, leg [1♂] [ MZUSP]; BRASIL, MG [Minas Gerais], Uberaba, IFTM Campus Uberaba , Malaise, 15.ix.2018, R . S. Capellari leg. [2♀] [ MZUSP]; Corrégo Azul , Araçatuba, SP [São Paulo], BRASIL, III- 1947, M.P. Barretto col. / 146 [1♀] [MZUSP]; 2- 946 [on the lateral of the label], Est. S. Paulo [São Paulo, BRASIL], Avanhandava, Barra Mansa, Barreto col. [1♀] [MZUSP]; I-945 [on the lateral of the label], Est. S. Paulo [São Paulo, BRASIL], Guatapará, Barreto col. [Photographed] [1♀] [MZUSP]; São Simão [BRASIL], I-38 [1♀] [MZUSP] .

Figures

FIGURE 26. T. glaucus. ♀. A. Dorsal habitus. B. Lateral habitus. C. Frons. D. Head, lateral view.

FIGURE 27. T. glaucus. ♂. A. Dorsal habitus. B. Lateral habitus. C. Frons. D. Head, lateral view.

FIGURE 28. T. glaucus distribution. Black: previously known distribution; Red: new records.