Phaeoxantha (Euphaeoxantha) lindemannae (Mandl, 1964) .

(Figs 283–295)

Megacephala (Phaeoxantha) lindemannae Mandl, 1964: 15–17 .

Phaeoxantha lindemannae: Cassola & Pearson 2001: 11.

Phaeoxantha lindemannae: Wiesner 2020: 30.

Type locality. Brazil: state of Amazonas, Rio Negro .

Type material (examined from photos Figs 283–284). Holotype ♂ in ZSM labelled: “ Brasilien / Rio Negro / Amazonas / 21.II.1963 / C. Lindemann ” [printed, except for handwritten “21”] // “ Megacephala / lindemannae / spec. nov.” [handwritten] // “Holo-typus ♂ / “ Megacephala (Phaeoxantha) linde- /mannae m. 1907 / det. Dr.K.Mandl ” [handwritten the last line printed]. Allotype ♀ in SDEI with same locality label data .

Other material examined. 2 ♂♂, 2 ♀♀ in CCJM, 2 ♂♂ in CJVB, 3 ♂♂, 1 ♀ in MHCP: “ Brasilia, Amazonas / Manaus, Rio Negro / 20.IX-14.X.1999 / M + P. Hrabovsky lgt.” . 1 ♂, in CDCL: “ Brasilia, Amazonas / L. bank of Rio Negro / 8 km N. of Manaus / on beach 6.X.1989 / M. Hrabovsky col.”

Differential diagnosis. Phaeoxantha (Euphaeoxantha) lindemannae differs from the three other species with which it shares posteriad-dilated elytra in males by its uniformly pale brownish coloured elytra (Figs 283–284, 293–295) which may be somewhat darkened, but consistently lacking any black maculae. Aedeagus (Fig. 291) is notably elongate, length 7.90–8.05 mm, width 1.00 mm), conically attenuated towards narrow, rounded apex.

The examined adult specimens are 20.9–24.1 mm long, 7.50–8.75 mm wide. The illustrated type specimens (ZSM) measures: male HT is 24.0 mm long, 8.70 mm wide; the female AT is 26.0 mm long, 9.65 mm wide.

Distribution and biology. Known only from the Brazilian state of Amazonas. Examined specimens come from banks of Rio Negro near Manaus. Adults are nocturnal and entirely flightless due to non-developed flight muscles as observed and presented by Zerm & Adis (2002). Life cycles of adults and larvae occurring in open areas of Central Amazonian floodplains in the region of Manaus were presented by Zerm & Adis (2001a, b, c) and Zerm et al. (2001), the larvae partly illustrated by Arndt et al. (1996), and in a key to larvae by Arndt et al. (2002), pupal morphology by Cárdenas et al. (2005).