Enderleiniella flavida, Mlynarek, Julia J., 2019

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

Enderleiniella flavida sp. nov. Figs 3 , 15-19

Diagnosis.

Medium Oscinellinae with a shiny frontal triangle and thorax. occiput with single strong bristle behind eye; one anterior and one posterior notopleural bristle Scutellum pale yellow, contrasting in colour with the dark scutum.

Description.

Total length 2.2-2.5 mm. Overall colour black. Head. Frontal triangle black, shiny, 0.6-0.75 times length of frons; ocellar tubercle black, shiny; frons brown to black, paler antero-medially; cephalic setae pale, 7-10 fronto-orbital setae well-developed, interfrontal setulae on margin of frontal triangle and fronto-orbital setulae sparse and small, 4-6 post-ocellar setulae small; gena yellow, microtomentose, 0.08-0.1 times eye height; eye bare; occiput with a strong and stout seta projecting from a short tubercle just dorsal to posterior midpoint of eye; face yellow; scape, pedicel and first flagellomere yellow, first flagellomere round, arista brown, thin at base, pubescence sparse and short; palpus, clypeus and proboscis yellow; proboscis geniculate. Scutum. Black, shiny, acrostichal and dorsocentral setae in three punctuate rows, notopleural bristle one anterior and one posterior relatively thick and long; outer postalar setae very short, gold, cryptic and fine; dorsocentral setae weak, scutum as long as wide; scutellum yellow, trapezoidal, 1.4-1.6 times wider than long, microtomentose; apical scutellar setae strong, on small tubercles on upper margin of scutellum, lateral scutellar setae as strong as apical setae ( Fig. 3 ). Legs. Yellow; femoral organ small row of two or three tubercles, tibial organ oval, pale, occupying middle third of hind tibia. Wing. Hyaline; veins brown; ratio of costal sectors C1: C2: C3: C4 - 1: 2.1: 1.4: 0.6; haltere yellow. Abdomen. paler than thorax, sparsely microtomentose; syntergites 1+2 membranous under scutellum, marginally longer than other tergites. Male postabdomen ( Figs 17 , 18 ). Epandrium small, higher than long in lateral view, wider than high in posterior view, with several setae; surstylus 0.7 times as high as epandrium, with a slight curve at the base, parallel-sided, apex rounded, surstylus with short setae; cercus broad with three narrow ventral projection, extending ventrally laterally, cercus separated by very narrow anal membrane posteriorly, cercus with sparse setae, one setae longer than others; distiphallus weakly sclerotised.

Type material.

Holotype ♂: DOMINICA: S. Chiltern Est, 20.ii.1965, W.W. Wirth (USNM; USNMENT01476004). Paratypes: same data as holotype (2♂, 4♀, USNM; USNMENT1476005-USNMENT01476009); DOMINICA: W.I. 2mi E. Ponte Casse, 5.x.1966, R.J. Gagne. Bredin-Archibol-SmithsonianBio.Surv.Dominica (1♀, USNM; USNMENT01476010); DOMINICA: W.I. d’LeauGommier, 16.iii.1965, W.W. Wirth (1♂, USNM; USNMENT01476011) DOMINICA: St. David: Emerald Pool, rainforest, 20.xi.1994, L. Masner (2♀, LEM).

Etymology.

The species name is from the Latin flavida (yellow), referring to the colour of the scutellum.

Remarks.

It is the first time that a strong and stout seta projecting from a short tubercle just dorsal to posterior midpoint of eye on occiput has been described in the Chloropidae . It could be that this seta has the same evolutionary origin as those found on many other Chloropidae species that possess a long (but not stout) seta on the postgena.

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 15 - 19. Enderleiniella flavida. 15 Lateral habitus 16 dorsal habitus 17 male genitalia (lateral) 18 male genitalia (posterior) 19 geographic distribution.