Eoneria ramirezi Gomes & Sepúlveda, 2023

Gomes, Lucas R. P., Sepúlveda, Tatiana A. & Pedraza-Lara, Carlos, 2023, Neriidae (Diptera: Schizophora) from Mexico: new species, new records and an identification key, Zootaxa 5264 (1), pp. 27-46 : 34-35

Eoneria ramirezi Gomes & Sepúlveda sp. nov.

( Figs 6 , 7 , 8B )

urn:lsid:zoobank.org:act:F72D9ABB-CBDC-4B94-9C83-45EC3C43DB76

Diagnosis. Head elongate, twice as long as antenna and dorsally straight. Arista apical. Inner process of pedicel triangular and narrow. Antennal base clothed with dense pruinescence and consequently opaque. Two fronto-orbital setae. Vibrissa absent. Gena and postgena wide and ventrally rounded, with a set of yellow setulae posteriorly. Parafacial wide and anteriorly rounded. Two well-developed notopleural setae. Pleuron with grey pruinescence; several dorsocentral setae reduced, only the last one developed and as long as the apical scutellar setae.

Description. Male. Body length 6.0 mm ( Fig. 6A, B ). Wing length 4.0 mm and width 1.0 mm. Brown with silvery pruinescence, except yellow face and white yellowish gena ( Fig. 6A, C ). Thorax brown with two dense silvery pruinose stripes which merge on posterior half and continue toward scutellum; postsutural scutum with intraalar narrow silvery pruinose stripe from transverse suture to level of postalar seta ( Fig. 6B, D ). Legs dark brown. Dorsal abdomen with longitudinal yellow stripe ( Fig. 6B ). Body setae spine-like.

Head. Antenna length half of head length ( Fig. 7A, B ).Arista apically bare, with basally brown.First flagellomere rectangular and short. Scape and pedicel same colour as antennal base. Flagellomere light brown. Palpus yellow. Antennal base with several dorsal sparse setulae. Frontal vitta orange ( Fig. 7B ). Fronto-orbital plate dark brown and silvery pruinose. Occiput brown with lateromedian yellow stripe; silvery pruinose and covered by black setulae. Parafacial broad and ventrally setulose.

Thorax. With 4–5 very short pre-sutural dorsocentral setae and 4 very short postsutural setae, prescutellar seta as long as anterior notopleural seta ( Fig. 6B, D ). Supra-alar and postalar setae almost same size as anterior and posterior notopleural setae; dorsocentral prescutellar seta slightly longer. Proepisternum ventrally yellow and dorsally brown and dense silvery pruinose; with one ventral seta. Basicosta with two well-developed setae preceded by several short black setulae; wing membrane entirely microtrichose; halter yellow. Coxae brown and dense silvery pruinose, the anterior one slightly yellowish. Fore coxa with two antero-apical setae and three anterolateral setae; anterolateral setae shorter and thicker. Mid and hind coxae with two lateral setae. Femora dark brown. Fore femur with anteroventral and posteroventral spine-like rows of setae, increasing in size distally and intercalated with shorter setae distally. Mid and hind femora without anteroventral and posteroventral setae. Mid femur anteriorly with 6–7 median setae. Tibiae semi-cylindrical, slightly widening distally and same colour as femora.

Abdomen. Syntergite 1+2 very setose, with 2 lateral marginal setae and 2–3 latero-dorsal marginal setae. Tergites brown and dense silvery pruinose; all tergites slightly darker distally. Sternites light brown to yellow. Syntergosternite 8, epandrium and cercus brown; epandrium twice longer than syntergosternite 8 ( Fig. 7 C ), folding ventrally to reach anterior half of segment 5 ventrally; cercus wide linear with rounded apex; surstylus linear ( Fig. 7 C, D ).

Female. Same as male, except: Body length 4.0–6.0 mm ( Fig. 6C, D ). Wing length 3.0–5.0 and width 0.7–2.0 mm. Oviscape brown; three times longer than the maximum width ( Fig. 7E, F ).

Etymology. Name in apposition. The specific name is in honor of Enrique Ramírez García, collector of the specimens and curator of Colección de Insectos del Bosque Seco, Estación de Biología Chamela, Universidad Autónoma de México, Chamela (EBCH).

Type-material. Holotype.Male. Mexico. Jalisco, Estación de Biologia Chamela ,trampa de fermento, 12.vi.1989, E. Ramírez ( EBCH) . Paratypes (72 males and 108 females). Same as holotype, 5 males and 6 females ( EBCH); same as holotype, except: 17.vii.1989, 1 male and 5 females ( EBCH) ; 20.vii.1989, 7 males and 2 females ( EBCH) ; 23.vii.1989, 2 males and 4 females ( CNIN) ; 5.vii.1989, 1 male ( EBCH) ; 8.vi.1989, 2 females ( EBCH) ; 15.v.1989, 5 males and 7 females ( EBCH) ; 14.v.1989, 1 male and 4 females ( EBCH) ; 12.v.1989, 4 males and 6 females ( CNIN) ; 21.v.1990, 1 male and 1 female ( CARF) ; 29.i.1990, 1 male ( EBCH) ; 16.v.1990, 3 males and 3 females ( CNIN) ; 16.x.1989, 2 males and 2 females ( CARF) ; 6.xii.1988, 2 males ( EBCH) ; 22.vii.1988, 1 female ( EBCH) ; 14.vi.1988, 1 male and 1 female ( CNIN) ; 7.xii.1988, 1 male ( EBCH) ; 19.vi.1991, 7 females ( EBCH) ; 17.vi.1991, 5 males and 13 females ( EBCH) ; 22.iv.1991, 3 males and 3 females ( EBCH) ; 19.vi.1991, 1 male ( EBCH) ; 24.vi.1991, 5 females ( EBCH) ; 10.vii.1989, 1 male ( EBCH) ; 5.vii.1989, 1 male ( EBCH) ; 23.viii.1989, 1 female ( EBCH) ; 5.x.1989, 1 male and 5 females ( CNIN) ; 6.ix.1989, 1 male ( EBCH) ; 7.ix.1989, 2 males and 5 females ( CNIN) ; 14.v.1990, 3 males ( EBCH) ; 3.vii.1990, 1 female ( EBCH) ; 8.vi.1989, 4 females ( EBCH) ; 5.vi.1989, 4 males and 2 females ( CNIN) ; 7.vi.1989, 1 male and 1 female ( EBCH) ; 1.v.1989, 1 female ( EBCH) ; 25.ii.1991, 3 males and 1 female ( EBCH) ; 1.iii.1991, 9 females ( EBCH) ; 24.iv.1991, 8 males and 4 females ( EBCH); McPhail, 1-8.x.1991, 1 female ( EBCH) ; 4.x.1993, 1 female ( EBCH). Michoacán. Km : 35 carretera 200, Playa Azul – Tecomán [18.22953, -103.12726], red aérea , 19.ix.1992, E. Ramírez, 1 male ( EBCH) .

Morphological variation. Body length 4.0–6.0 mm. Wing length 3.0–5.0 mm and width 0.7–2.0 mm. Some specimens bear medially divided silvery pruinose stripe on postsutural scutum that can reach the scutoscutellar suture; intra-alar silvery pruinose stripe absent. Fore coxa with 2–3 anterolateral setae; hind coxa with 1–2 lateral seta.

Distribution. Mexico (Jalisco and Michoacán).

Remarks. This species was collected in the Chamela-Cuixmala Biosphere Reserve (CCBR), Jalisco, Mexico. The reserve is located near the Mexican Pacific coast and is mainly composed of tropical dry forests ( Noguera et al. 2002). This new species is easily differentiated from known species of Eoneria in the vibrissa absent.

Figures

FIGURE 6. Eoneria ramirezi sp. nov.: male lateral (A) and dorsal (B), female lateral (C) and dorsal (D). Scale bar= 1 mm.

FIGURE 7. Eoneria ramirezi sp. nov.: male head lateral (A) and dorsal (B), male terminalia dorsal (C) and lateral (D), ovipositor dorsal (E) and lateral (F). Scale bar= 0.5 mm.

FIGURE 8. Distribution records of Neriidae in Mexico: Cerantichir enderleini Hennig, 1937 and Cerantichir mexicana sp. nov. (A); Eoneria blanchardi Aczél, 1951 and Eoneria ramirezi sp. nov. (B); Odontoloxozus longicornis (Coquillett, 1904) and Odontoloxozus pachycericola Mangan & Baldwin, 1986 (C); Glyphidops durus (Cresson, 1926) and G. filosus (Fabricius, 1805) (D); G. flavifrons (Bigot, 1886) and G. xanthopus (Schiner, 1868) (E); Nerius pilifer Fabricius, 1805, N. plurivittatus Bigot, 1886, and N. purpusianus Enderlein, 1922 (F). Circle= literature records. Star= new records.