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Revision of Neotropical Genea Rondani (Diptera, Tachinidae, Tachininae, Leskiini)

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Revision of Neotropical Genea Rondani (Diptera, Tachinidae, Tachininae, Leskiini) Volume 51(31):481‑497, 2011 REVISION OF NEOTROPICAL GENEA RONDANI (DIPTERA, TACHINIDAE, TACHININAE, LESKIINI) 1 ENIO NUNEZ 2,3 MÁRCIA S. COURI ABSTRACT The Neotropical species of Genea Rondani, 1850 (Diptera, Tachinidae, Tachininae, Leski- ini) are revised by the examination of type-material of almost all species and a large material deposited in many scientific collections. G. australis (Townsend), G. brasiliensis (Townsend), G. gracilis James, G. jaynesi (Aldrich), G. major (Townsend), G. pellucens (Curran), G. tenuirostris (James), G. trifaria (Wiedemann) were keyed and redescribed with the first descriptions of male terminalia. G. longipalpis (Wulp) was not included in this study as no material was examined and the available data are restricted to the original description. G. glossata (Townsend) is proposed as a junior synonym of G. trifaria. G. paulistana sp. nov. from São Paulo is proposed as a new species. Key-Words: Identification; Key; Morphology; Revision; Taxonomy. INTRODUCTION included few Genea species parasitising Pyralids (Lepidoptera). Genea Rondani, 1850 (Diptera, Tachinidae) is The total number of neotropical species is due a genus of Leskiini with ten Neotropical and seven to the revision of the nomenclatural changes of the Nearctic species (O’Hara & Wood, 2004; Wood & Nearctic tachinids made by O’Hara & Wood (1998), Zumbado, 2010). where they formalized the previous changes implic- This is one of the oldest genera of the tribe itly applied by Wood (1987). In this sense, the Neo- and some of its species are recorded as parasitoids tropical genera Dejeaniopalpus Townsend, Jaynesleskia of the sugarcane borer Diatraea spp. (Lepidoptera, Townsend and Leskiomima Brauer & Bergenstamm Pyralidae). are synonymous of Genea Rondani. James (1947) presented a study on Genea Concerning the 10 known Neotropical species and suggested that G. glossata and G. trifaria were of Genea we confirm the synonymy between G. trifar- probably conspecific. Some years later, Guimarães ia (Wiedemann) and G. glossata (Townsend), previ- (1971) listed five species in the genus. Guimarães ously suggested by James (1947) and one new species (1977) published a catalogue of host parasites which G. paulistana spec. nov. was also described. 1. Universidade Severino Sombra. Rua Expedicionário Oswaldo de Almeida Ramos, 280, Centro, Vassouras, 27000-000, Rio de Janeiro, RJ, Brasil. 2. Museu Nacional, Universidade Federal do Rio de Janeiro. Quinta da Boa Vista, 20940-040, Rio de Janeiro, RJ, Brasil. 3. CNPq fellow. 482 Nunez, E. & Couri, M.S.: GENEA Rondani: Neotropical species The opportunity to study a copious material Dejeaniopalpus Townsend, 1916d: 312. Type species: of several scientific collections including the exami- Dejeaniopalpus texensis Townsend, 1916 (origi- nation of type material, led to this revision where nal designation). G. australis (Townsend), G. brasiliensis (Townsend), Jaynesleskia Townsend, 1934: 395. Type species: G. gracilis James, G. jaynesi (Aldrich), G. major Leskiomima jaynesi Aldrich, 1932 (original (Townsend), G. pellucens (Curran), G. tenuirostris designation). (James), G. trifaria (Wiedemann) are keyed and re- Leskiella James, 1947: 96. Type species: Leskiella described with the first descriptions of male termina- brevirostris James, 1947 (original designation). lia. Genea longipalpis (Wulp) was not included in this [Nearctic]. study as no material was examined and the available data are restricted to the original description. Genea glossata (Townsend) is proposed as a junior synonym Recognition of G. trifaria. Yellow and golden flies of variable length, rang- ing from 5.5 to 12 mm. MATERIAL AND METHODS Head: white coloured with silver or golden pru- The material examined belongs to the collec- inosity near vertex; dichoptics; eyes bare; antenna tions of the Museu de Zoologia da Universidade de yellow; scape erect and very close to each other; São Paulo (MZSP), Instituto Nacional de Pesquisa da arista slightly plumose; vitta yellow; frontal setae Amazonia (INPA) and National Museum of Natural row ending a little below the level of the anten- History (USNM), wherein most of the types of Genea nal insertion; face visible in profile; long probos- are housed. cis, mentum always surpassing the head height; The male terminalia were treated with potas- occiput with white pruinosity, the upper half of sium hidroxid (KOH 10%), neutralized with acetic head dark in ground colour otherwise white; beard acid (50%), placed through an alchoolic series (70%, white. 90%) and glycerin. After this treatment they were dissected, drawn and posteriorly put into a microvial Thorax: scutum with golden pruinosity; acrostichal with glycerin pinned with their respective specimen. setae 1+1 or 2+1; intra-alars 1+3; notopleurals 2; The drawings were made with a Wild M3C stereo- supra-alars 3, the second one the largest; postalars 2; scopic microscopic and a Leica DMLS microscopic, prosternum bare; proepisternum with one seta, bare both with camera lucida. The types of G. trifaria and above; 1 proepimeral seta; katepisternals setae 2:1; G. longipalpis were not examined because their loan anepisternals 5-7; merals 5-11; katepimeron bare or were not made possible. The terminology adopted with a few setulae. Wing usually long and a little bit in the decriptions are the same proposed by O’Hara narrower in males; vein R1 entirely setulose on dorsal (2002). surface (except in G. jaynesi, setulose basally on dor- sal surface), vein R4+5 setulose from base (sometimes with some ventral setulae) to crossvein r-m on dorsal RESULTS surface and sometimes, surpassing it; wing cell r4+5 narrowly open near apex; vein M1 rarely with few Genea Rondani, 1850 sparse setulae. Legs with medial surface of coxa en- tirely bare; fore femur with a row of anterodorsal, Genea Rondani, 1850: 172. Type species: Genea mac- posterodorsal and posteroventral setae each; fore uliventris Rondani, 1850 (= Stomoxys trifaria tibia with one anterodorsal row of setae; claws and Wiedemann, 1824) (by monotypy). pulvilli well developed in males, (except in the spe- Geneopsis Townsend, 1927: 212. Type-species, major cies where the females and males are alike, both pre- Townsend original designation). senting proclinate and reclinate orbital setae); hind Geneoglossa Townsend, 1935: 225. Type-species, glos- femur with one anterodorsal row of setae; hind tibia sata Townsend original designation). with one anterodorsal row of setae, the median one Leskiomima Brauer & Bergenstamm, 1891: 68, 102 the largest. (also 1892: 372, 406; subsequently spelled Leskiomera, error). Type species: Stomoxys tenera Abdomen: yellow and/or gold, presenting median Wiedemann, 1830 (by monotypy). apical brownish spots dorsally or dorsal brown Papéis Avulsos de Zoologia, 51(31), 2011 483 stripes; small lateral brown spots on T3 to T5 some- Male terminalia: sternite 5 square shaped with “V” times fused with the median apical spots or with shaped median cleft covered with setulae and usu- the dorsal brown stripes; median marginal setae, ally with a dark brown area around setae close to the sometimes present on T1+2 and always present on hind margin; high arched epandrium; hipandrium T3 (except in G. gracilis); row of marginals on T4 not fused dorsally; distiphalus with lateral arms short; and T5. ejaculatory apodeme fan shaped. Key to the Neotropical species of Genea (G. longipalpis not included) 1. Abdomen with median basal brownish spots like upside-down triangles [Venezuela, Colombia, Brazil, Ar- gentina] ......................................................................................................................G. jaynesi (Aldrich) Abdomen with a median dorsal brown stripe or at least median apical brown spots dorsally on T3 and/or T4 ...........................................................................................................................................................2 2. Palpus filiform or slightly clavate, with at most 1.2 times the length of the first flagellomere .....................3 Palpus exceptionally long, extending forward far beyond the lower facial margin, at least 1.5-2.0 times lon- ger than the first flagellomere ..................................................................................................................5 3. Large and robust flies; mentum with almost the same length of the head height; wing vein R1 dorsally setu- lose on the base; T5 deep yellowish, distinct from the other tergites [Honduras, Guatemala, Mexico] ....... ................................................................................................................................ G. pellucens (Curran) Small and delicate flies; mentum at least 1.3 times longer than head height; wing vein R1 entirely setulose on dorsal surface; T5 colour indistinct from the other tergites .................................................................4 4. Fronto-orbital plate broad with almost the same width of the eye at the level of the antennal insertion; vein M1 sometimes with few sparse setulae; T3 with one pair of median marginals; T3-T5 with a white pruinose band at the anterior margin [Brazil, Bolivia] ........................................................ G. australis (Townsend) Fronto-orbital plate narrow with half width of the eye at the level of the antennal insertion; vein M1 always bare; T3 without median marginals; T3 and T4 with transversal brown bands at the posterior margin fused to the median apical brown spots of these tergites [Brazil] ................................................G.
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