Pyrogaster nigrolineatus, Pic, 1929

Silveira, Luiz F L, Khattar, Gabriel, Vaz, Stephanie, Wilson, Vinicius A., Souto, Paula M., Mermudes, José R. M., Stanger-Hall, Kathrin F., Macedo, Margarete V. & Monteiro, Ricardo F., 2020, Natural history of the fireflies of the Serra dos Órgãos mountain range (Brazil: Rio de Janeiro) - one of the ‘ hottest’ firefly spots on Earth, with a key to genera (Coleoptera: Lampyridae), Journal of Natural History 54 (5 - 6), pp. 275-308 : 302

P. nigrolineatus Pic, 1929 ( Figure 5 M )

Differential diagnosis. Dorsal colour pattern variable, but generally overall dark-brown to brown, pronotal disc sometimes with outer borders yellow, with paired orangish vittae, sometimes medially fused, elytron sometimes with longitudinal yellow stripes and/or a median transverse stripes. Elytra wider at apical third. Females with rounded lanterns on sterna VI and VII, the latter sometimes evanescent.

Remarks: Although this species is commonly found active during daytime, one male was caught flying and flashing during night-time. Note that males have fully developed lanterns, which is rare in diurnal firefly species.

Figures

Figure 5. Diversity of Photurinae fireflies of the Serrados Órgãos.A –Bicellonycha albilatera, B – Bicellonycha tenuicornis, C – Photuris velox, D – Photuris elliptica, E – Photuris femoralis (modified from Souto et al. 2019), F – Photuris lugubris, G – Pyrogaster moestus, H – Pyrogaster lunifer, I – Pyrogaster vestitus, J – Pyrogaster elongatior, K – Pyrogaster aureus, L – Pyrogaster angustatus, M – Pyrogaster nigrolineatus, N – Pyrogaster telephorinus, O – Pyrogaster margipallens, P – Pyrogaster atrocinctus, Q – Pyrogaster coxalis. Scale bar:2 mm.