Akamboja Roza, Quintino, Mermudes and Silveira, 2017: 503

Silva Roza, André, Miras Mermudes, José Ricardo & Silveira, Luiz Felipe Lima da, 2019, New species and rediagnosis of Akamboja, and a new record for A. minimum (Coleoptera: Phengodidae, Mastinocerinae), Journal of Natural History (J. Nat. Hist.) 52 (45 - 46), pp. 2935-2947 : 2937-2938

Akamboja Roza, Quintino, Mermudes and Silveira, 2017: 503 .

Type species. Akamboja minimum Roza, Quintino, Mermudes and Silveira, 2017 .

Diagnosis. Antenna with 10 antennomeres, IV to VIII with two short symmetrical branches, 1.5 to 2× the size of the antennomere; branches of antennomere IX variable ( Figure 1c ); mandible small, curved downwards ( Figure 1d ); posterior tentorial pit consisting of a single small fossa ( Figure 2a, b ); first tarsomere of anterior leg with a ventral comb as long as the tarsomere ( Figure 2a ); claws with six long and asymmetrical teeth ( Figure 2b ); aedeagus with patch of bristles at paramere apex ( Figure 3a, b ).

Key to Mastinocerinae genera with 10 antennomeres

Adapted from Zaragoza-Caballero and Pérez-Hernandéz (2014a), with modifications on couplet 4 ” and the addition of two new couplets:

4 ” – Ten antennomeres .......................................................................................................................... 4 ” a 4 ” a – Interantenal space close to scape length ................ ................ Decamastinocerus Wittmer 4 ” b – Interantenal space almost twice the scape length .............. Akamboja Roza et al.

Key to species of Akamboja (This key does not invalidate the key presented in Roza et al. 2017; it only includes the new species described herein)

1 – Branches of antennomere IX separate, specimens from Ilha Grande............................ .......................................................................................................... Akamboja insularis sp. nov.

1 ʹ – Branches of antennomere IX fused ........................................................................................ 2

2 – Pronotum dark brown ................................................................................................................... 3

2 ʹ – Pronotum light brown.................................................................................................................. 4

3 – Elytron reaches the anterior margin of the second abdominal segment; lateral region of the head sparsely setose posterior to eyes; vertex occupying 3/5 of head in dorsal view; specimens from Andradas..................................................................... ...................................................................................... Akamboja tenebrae Roza et al., 2017

3 ʹ – Elytron reaches the anterior margin of the third abdominal segment; lateral region of the head densely setose posterior to eyes; vertex occupying 1/2 of head in dorsal view; specimens from Dores do Rio Preto ....................................................................... ................................................................................... Akamboja caparaoensis Roza et al., 2017

4 – Eyes occupying 2/3 the head width, in lateral view; apical maxillary palpomere 3.5× longer than subapical......................................................................................................... 5

4 ʹ – Eyes occupying half head width, in lateral view; apical maxillary palpomere 4.5× longer than subapical; specimens from Teresópolis, Itatiaia and São José do Barreiro (altitudinal range 1200 m to 1900 m) … .................................................................. .......................................................................................... Akamboja cleidae Roza et al., 2017

5 – Specimens larger (4.1 – 4.5 mm); elytron large, reaching the posterior margin of the fourth segment of abdomen; vertex occupying 2/5 of head in dorsal view; specimens from Itatiaia, from 1280 m to 1440 m ............................................................................. .............................................................................. Akamboja monteirorum Roza et al., 2017

5 ʹ – Specimens smaller (3.3 – 3.8 mm); elytron small, reaching the anterior margin of the third segment of abdomen; vertex occupying 3/5 of head in dorsal view; specimens from Teresópolis , Tijuca and Ilha Grande, from 200 m to 900 m ............................................................. .................................................................................................... Akamboja minimum Roza et al ., 2017

Figures

Figure 1. Akamboja insularis sp. nov., holotype male: (a) habitus, dorsal; (b) habitus, lateral; (c) antenna, lateral; (d) head and pronotum, lateral; (e) head and pronotum, dorsal; (f) hind wing, dorsal.

Figure 2. Akamboja insularis sp. nov., paratype. Scanning electron micrographs. (a) head, ventral; (b) tentorial pit, close; (c) antenna, ventral.

Figure 3. Akamboja insularis sp. nov., paratype male: scanning electron micrographs. (a) protarsus, first tarsomere, comb, lateral; (b) protarsus, claw, lateral.