Enderleiniella longiventris (Enderlein, 1912)

Mlynarek, Julia J., 2019, Revision of the New World genus Enderleiniella Becker, 1912 (Diptera, Chloropidae), ZooKeys 884, pp. 107-134 : 107

Enderleiniella longiventris (Enderlein, 1912) Figs 1 , 2 , 20-22 , 23-27

Tricimba longiventris Enderlein, 1911: 207 (type locality: Costa Rica).

Enderleiniella longiventris : Becker 1912: 192.

Description.

Total length 2.5-3.0 mm. Overall colour black. Head Frontal triangle black, shiny, microtomentose, 0.55-0.6 times length of frons; ocellar tubercle black, shiny, microtomentose; frons brown to black, paler antero-medially; cephalic setae dark, 12-15 fronto-orbital setae well-developed, interfrontal setulae on margin of frontal triangle and, seven or eight post-ocellar setulae small, posterior setulae proclinate; gena yellow, microtomentose, 0.08-0.09 times eye height; face yellow; scape and pedicel yellow, first flagellomere yellow apico-dorsally darker, first flagellomere round, arista brown, thin at base, pubescence sparse and short; palpus yellow clypeus and proboscis brown, proboscis geniculate and thin ( Fig. 1 ). Scutum. Black, pruinose, acrostichal, and dorsocentral setae in three punctuate rows, scutum longer than wide; outer postalar bristle very robust and long, scutellum black, trapezoidal, 1.2 times wider than long, microtomentose, rugose; apical scutellar setae strong, on tubercles on upper margin of scutellum, lateral scutellar setae much weaker than apical setae, on tubercles, longer than surrounding setae ( Fig. 2 ). Legs. Yellow, hind femur and hind tibia brown; femoral organ arranged in one line of three strong sensillae, tibial organ oval, pale, occupying middle third of hind tibia. Wing. Hyaline; veins brown; ratio of costal sectors C1: C2: C3: C4 - 1: 1.3: 1: 0.4; haltere yellow. Abdomen. As dark as thorax, sparsely microtomentose; syntergites 1+2 membranous under scutellum, slightly longer than other tergites. Male postabdomen ( Figs 23-27 ). Remnant of sternite 6 present; Epandrium large, bulbous, higher than long in lateral view, wider than high in posterior view, with several setae; surstylus half the height of epandrium, straight, parallel-sided, blunt-ended, surstylus with one or two anterior setae near base and short setae elsewhere; cercus elongate, straight with a narrow ventral projection, extending ventrally, cercus with sparse setae, one or two setae longer than others; distiphallus weakly sclerotised, straight, blunt ended.

Molecular data.

Accession number MK919191.

Type material.

Holotype ♂: COSTA RICA, H. Schmidt (Warsaw).

Other material examined.

COSTA RICA: Cartago: Rio Grande de Orosi nr Tapanti Natl. Pk. 1100-1150m, floodplain and forest, 9.x.1999, S. Marshall & M. Buck. (1♂, DEBU; DEBU00103967). MEXICO: Chiapas: 7 km N Cacahoatan, 22.iv.1983, W.N. Mathis (2♂, USNM; USNMENT01476013-USNMENT01476014, USNMENT01476026); Chiapas: Finca Prusia, 33 km S Jaltenango, 1000m, 10-12.v.1985, W.N. Mathis (3♂, 1♀, USNM; USNMENT01476015-USNMENT01476018); Chiapas: 9 km S Union Juaréz, 23.iv,1983, W.N. Mathis (1♂, USNM; USNMENT01476019); Chiapas, 20-25 mi. N Huixtla 3000', 4.vi.1969, B.V. Peterson (6♂, 1♀, CNC); Colima: 7mi NE Colima, 3.xii.1948 (1♀, USNM; USNMENT01476020); Tamaulipas: Liera, 10-6-1956, reared ex Colocasia sp. probably antiquorom (1♂, 2♀, USNM; USNMENT01476021-USNMENT01476023); San Luis Potosi: Naranjo, xii.1960, A. Fabergé, reared ex aroid flower (1♀, USNM; USNMENT01476024); Veracruz: Fortin de las Flores, 952m, 02.v.1985, W.N. Mathis (1♂, USNM; USNMENT01476025).

Remarks.

Although the holotype was collected in Costa Rica, most examined specimens of E. longiventris for this study are from Mexico. This is one of two species of Enderleiniella (the other is E. maculata ) whose known range extends into the Nearctic Region, with specimens recorded in the Mexican states of San Luis Potosi and Tamaulipas.

Figures

Figures 1 - 4. 1 Enderleiniella longiventris, head lateral view. 2 Enderleiniella longiventris, scutum and scutellum 3 Enderleiniella flavida, scutum and scutellum 4 Enderleiniella maculata, wing. Scale bars: 0.5 mm.

Figures 20 - 22. Enderleiniella longiventris. 20 Lateral habitus 21 dorsal habitus 22 geographic distribution.

Figures 23 - 27. Enderleiniella longiventris. 23 Male abdomen (lateral) 24 male genitalia (lateral) 25 male genitalia (posterior) 26 male genitalia (ventral) 27 male genitalia (posteroventral). Abbreviations: cer - cercus; hyp - hypandrium; phal - phallus; phap - phallapodeme; pog - postgonite; S 6 - remnant sternite 6; T 7 + 8 - tergite 7 + 8.