Trihennigma zavattierii, Lara & Lukashevich, 2013

Lara, María Belén & Lukashevich, Elena D., 2013, The first Triassic dipteran (Insecta) from South America, with review of Hennigmatidae, Zootaxa 3710 (1), pp. 81-92 : 89

Trihennigma zavattierii sp. nov.

( Figs 4 , 5A, B )

Type material. Holotype: MCNAM-PI 24607 (part and counterpart of partly preserved isolated wing). Quebrada del Durazno , southern flank of Cerro Cacheuta , southern end of the Precordillera , Cuyo Basin , Mendoza Province, Argentina; upper section of the Potrerillos Formation; early Late Triassic (equivalent to the Carnian of marine sequences).

Etymology. In honour of the geologist Dr. Ana M. Zavattieri, for her great contributions to the Triassic geology and palaeontology of Argentina.

Description. Wing infuscate. Sc and Rs long, about 70% and 80 % of wing length, respectively; R 2 shifted to R 1; R 2+3 divided by r-rs as 1:2; R 4 divided by r3-r4 as 6:5.5 and by r4-r5 as 7:4.

Measurements (mm). Wing length 8.6 long, 2.9 wide (3.3 mm estimated).

Figures

FIGURE 4. Trihennigma zavattierii gen. et sp. nov.: holotype MCNAM-PI 24607: A, photo, B, drawing, C, reconstruction. Scale bar 1.7 mm. Abbreviation: ai—alular incision.

FIGURE 5. Basiala of Hennigmatinae: A, B, Trihennigma zavattierii gen. et sp. nov.: holotype MCNAM-PI 24607, part and inverted counterpart; C, Metatrichopteridium cladistorum (Shcherbakov, 1995): holotype PIN 3965/2789. Abbreviation: ai— alular incision.