Mesembrinella serrata Whitworth & Yusseff-Vanegas 2019, sp. nov.
Creators: name: Whitworth, Terry L.
name: Yusseff-Vanegas, Sohath
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Calliphoridae
Mesembrinella
Mesembrinella serrata

description: Mesembrinella serrata Whitworth, sp. nov.
(Figs 89–90, 179–180, 232, 275, 319, 363, 404, 448, 480)
Diagnosis. A small fly averaging 9.2 mm (8–10/5) in length. Wing with section IV 0.44 of section III; distal 2/3 of wing along costa faintly infuscated; subcostal sclerite with long tan setae; abdomen bluish with faint white tomentum; usually kat 1:1. Male: epiphallus of normal length (Fig. 179); hypophallic lobes broad, pear-shaped in dorsal view, with coarse serrations (Fig. 180). Female T6 of WV shape (Fig. 319), with suture midway.
Description. Male. Head. Frons 0.028 (0.025 –0.030 /2) of head width at narrowest. Fronto-orbital, parafacial and gena yellow-gold; frontal vitta dark red; frontal setae ascending about 30% of distance to vertex, to where frontal vitta is obliterated; gena with horizontal row of brown setae midway, otherwise with small, scattered brown setae; postgena yellow with fine yellow setae; occiput dark with pale yellow tomentum and fine yellow setae; median occipital sclerite shiny dark brown; antenna entirely orange with whitish tomentum, arista tan; palpus typical; eye with median facets 4x size of lateral facets; ocellar triangle small, anterior ocellus 2x size of posterior ocelli; row of long tan supravibrissal setae ascending about 1/8 of distance to antennal base.
Thorax. Dorsum dark brown with golden brown tomentum and a pair of brown lateral tomentose stripes with presutural stripe midway; pleura mostly orange with golden tomentum; chaetotaxy: ac 2:1, dc 2:3, ia 1, ph 1, ppn 3x 3, kat 1:1, rarely 2:1, meral setae typical, 1 pair of converging ap, sa and lat absent, 1 stout bas, 1 weak pb, 1 disc; subscutellum moderately developed; spiracles orange, medium-sized; legs: femora orange, tibiae and tarsi brown. Wing with distal 2/3 of costa faintly infuscated; subcostal sclerite with long tan setae; basicosta and tegula orange; section IV 0.44 of section III; disc of upper calypter pale with brown rim and short tan setae; lower calypter with yellowish disc and dark brown rim with long tan setae.
Abdomen. T1+2–3 mostly dark orange, rear of T3 bluish; T4–5 shiny blue with faint white tomentum; rear margins of T4 and T5 with stout marginal setae dorsolaterally, no setae mid-dorsally; disc of T5 bare. Terminalia in lateral view with surstylus as in Fig. 89; in posterior view, cerci very robust, pear-shaped, narrowed above, broadest midway and tapering distally to broad tips (Fig. 90); phallus in lateral view with medium-long, slender epiphallus with small backward curve (Fig. 179); in dorsal view, hypophallic lobes broad, pear-shaped, with coarse serrations along edge (Fig. 180). T6, STS7+8, pre- and postgonite, ejaculatory sclerite and ST6 as in Fig. 232; ST2–5 as in Fig. 275.
Female. Similar to male except frons 0.238 (0.28–0.29/3) of head width at narrowest. T6 of WV shape with suture midway; T7 divided midway; T8 as separate sclerites (Fig. 319); ST6–8 and hypoproct as in Fig. 363; spermathecae filiform (Fig. 404); ST1–5 as in Fig. 448.
Type material. HOLOTYPE ♂* (Peru, Madre de Dios; CNC; Fig. 480), labeled: Avispas [= Avispa], Madre / de Dios, PERU / 20 - 30.IX.1962 / L. Pena. 400m.; HOLOTYPE / Mesembrinella / serrata / T.L. Whitworth.
ALLOTYPE ♀: Peru, Madre de Dios. Avispas [= Avispa], 20–30.ix. 1962, 400 m, L. Pena (CNC).
PARATYPES: Peru, Madre de Dios. 1 ♂, 1 ♀ *, Avispas [= Avispa], 20–30.ix. 1962, 400 m, L. Pena (CNC); 1 ♀, same data except 1–15.x.1962 (CNC).
Distribution. Peru.
Remarks. No specimens were barcoded.
Etymology. The species name serrata is derived from the Latin serra (= saw), and refers to the distinctive serrations along the edge of the hypophallic lobes.
description: Published as part of Whitworth, Terry L. & Yusseff-Vanegas, Sohath, 2019, A revision of the genera and species of the Neotropical family Mesembrinellidae (Diptera: Oestroidea), pp. 1-146 in Zootaxa 4659 (1) on page 132, DOI: 10.11646/zootaxa.4659.1.1, http://zenodo.org/record/3377239