Akamboja, Roza & Quintino & Mermudes & Silveira, 2017

Roza, André Silva, Quintino, Hingrid Yara Souza, Mermudes, José Ricardo Miras & Silveira, Luiz Felipe Lima Da, 2017, Akamboja gen. nov., a new genus of railroad-worm beetle endemic to the Atlantic Rainforest, with five new species (Coleoptera: Phengodidae, Mastinocerinae), Zootaxa 4306 (4), pp. 501-523 : 504-505

Key to species of Akamboja gen. nov.

1 Pronotum dark brown ( Figs 27 and 30 )....................................................................2

1’ Pronotum light brown ( Fig. 2 )............................................................................3

2 Elytron reaches the anterior margin of the second abdominal segment ( Fig. 27 ); lateral region of the head sparsely setose posterior to eyes ( Fig. 35 ); vertex occupying? of head in dorsal view ( Fig. 36 ); specimens from Andradas ( Fig. 36 )......................................................................................... Akamboja tenebrae sp. nov.

2’ Elytron reaches the anterior margin of the third abdominal segment ( Fig. 30 ); lateral region of the head densely setose posterior to eyes ( Fig. 40 ); vertex occupying 1/2 of head in dorsal view ( Fig. 41 ); specimens from Dores do Rio Preto......................................................................................... Akamboja caparaoensis sp. nov.

3 Eyes occupying two thirds the head width, in lateral view ( Figs 5 and 26 ); apical maxillary palpomere 3.5x longer than subapical ( Figs 5 and 26 ).....................................................................................4

3’ Eyes occupying half head width, in lateral view ( Fig. 24 ); apical maxillary palpomere 4.5x longer than subapical ( Fig. 24 ); specimens from Teresópolis, Itatiaia and São José do Barreiro (altitudinal range 1,200 to 1,900 m)...................................................................................................... Akamboja cleidae sp. nov.

4 Specimens larger (4.1–4.5 mm); elytron large, reaching the posterior margin of the fourth segment of abdomen; vertex occupying? of head in dorsal view ( Fig. 31 ); specimens from Itatiaia, from 1,280 to 1,440 m ..... Akamboja monteirorum sp. nov.

4’ Specimens smaller (3.3–3.8 mm); elytron small, reaching the anterior margin of the third segment of abdomen; vertex occupying? of head in dorsal view ( Fig. 6 ); specimens from Teresópolis and Tijuca, from 200 to 900 m ..................................................................................................... Akamboja minimum sp. nov.

Figures

FIGURES 23 – 30. Akamboja cleidae sp. nov. 23 habitus, dorsal. 24 habitus, lateral. 25 head and pronotum, lateral. 26 head, dorsal. Akamboja monteirorum sp. nov., 27 habitus, dorsal. 28 habitus, lateral. 29 head and pronotum, lateral. 30 head, dorsal.

FIGURES 1 – 6. Akamboja minimum sp. nov. 1 habitus, dorsal. 2 habitus, lateral. 3 antenna, lateral. 4 head and pronotum, lateral. 5 head and pronotum, dorsal. 6 head, ventral.

FIGURES 31 – 40. Akamboja tenebrae sp. nov. 31 habitus, dorsal. 32 habitus, lateral. 33 head and pronotum, lateral. 34 head, lateral. 35 head, dorsal. Akamboja caparaoensis sp. nov. 36 habitus, dorsal. 37 habitus, lateral. 38 head and pronotum, lateral. 39 head, lateral. 40 head, dorsal.

FIGURES 41 – 43. Map of Akamboja gen. nov. species distribution. Red dots mark the regions of occurrence of the species. Blue highlight marks the Serra do Mar mountain range high altitudinal areas. Yellow highlight marks Serra da Mantiqueira mountain range high altitudinal areas. Green highlight marks Tijuca Massif high altitudinal areas. The regions limits are approximated based on maps of project radambrasil (1983). 41 Akamboja minimum sp. nov. distribution. 42 Akamboja cleidae sp. nov. distribution. 43 Akamboja monteirorum sp. nov. distribution.