Neometrypini, Desutter-Grandcolas, 1988

Almeida, Vitor Tonon De, Souza-Dias, Pedro G. B., Nihei, Silvio Shigueo & Campos, Lucas Denadai De, 2025, Silent crickets: A new genus of Neometrypini from the Brazilian Atlantic Forest (Orthoptera: Oecanthidae: Tafaliscinae), Zootaxa 5729 (2), pp. 315-334 : 331

Key to genera of Neometrypini (modified from Campos et al. 2022 and Campos & Tonon in press)

1. Ocelli generally present; forewings absent, micropterous, or brachypterous; when present, FWs generally lacking longitudinal veins, sometimes with up to six non-reticulated veins or absent................................................. 2

- Ocelli generally absent; FWs present, fully or almost fully covering the abdomen, with more than six reticulated longitudinal veins............................................................................................... 6

2. FWs absent.................................................................................. Apterotrypa

- FWs present......................................................................................... 3

3. Posterior margin of pronotum covering FWs.......... Aphonodiacanthus Tonon & Campos gen. nov. ( Figs. 2E , 5E and 8E )

- Posterior margin of metanotum covered by the FWs.......................................................... 4

4. Meso- and metanotum not medially covered by FWs; FI and FII twice as wide as TI and TII; cerci apex rounded; subapical spurs present only on the inner side of hind tibiae (TIII).............................................. Annelotrypa

- Meso- and metanotum medially covered by FWs; FI and FII as wide as TI and TII; cerci apex pointed; subapical spurs present on both sides of TIII................................................................................... 5

5. FWs wider than long, covering the metanotum (except for Neometrypus amazonus and Neometrypus couriae , which are apterous). Male genitalia: LLophi with inner margin membranous...................................... Neometrypus

- FWs longer than wide, covering the first two abdominal tergites. Male genitalia: LLophi completely sclerotized................................................................................................... Cylindrogryllus

6. Body cylindrical; fastigium without a tubercle; first abdominal tergite with projections....................... Brazitrypa

- Body dorsoventrally flattened; fastigium with an apical tubercle; first abdominal tergite without projections.. Dicerorostrum

Figures

FIGURE 2. Aphonodiacanthus melanocephalus Tonon, Campos & Souza-Dias sp. nov. Male:A—habitus, dorsal; B—habitus, lateral; C—habitus, ventral (red arrows indicate paler macula); D—head, frontal; E—LL and FW (red arrow); F—supra anal plate (red arrow indicates V-shaped format); G—subgenital plate. Female: H—habitus, dorsal; I—habitus, lateral; J—habitus, ventral (red arrows indicate paler macula); K—supra anal plate (red arrow indicates V-shaped format); L—subgenital plate; M—ovipositor, dorsal; N—ovipositor, ventral. Scales A–C, H–J: 2mm; D–G, K–N: 1mm.

FIGURE 5. Aphonodiacanthus maculatus Tonon & Campos sp. nov. Male: A—habitus, dorsal; B—habitus, lateral; C— habitus, ventral; D—head, frontal; E—LL and FW (red arrow); F—supra anal plate (V-shape on red arrows); G—subgenital plate; H—supra anal plate illustration (V-shape on red arrows). Scales A–C: 2mm; E–G: 1mm.

FIGURE 8. Aphonodiacanthus chlorops Tonon & Campos sp. nov. Male: A—habitus, dorsal; B—habitus, lateral; C—habitus, ventral; D—head, frontal; E—LL and FW (red arrow); F—supra anal plate; G—subgenital plate. Scales A–C: 2mm; E–G: 1mm.