Biribellus, Galileo, 1987

Santos-Silva, Antonio, Hernandez, Juan José Ramírez & Galileo, Maria Helena M., 2018, A new species of Biribellus Galileo, 1987 (Coleoptera, Cerambycidae, Prioninae, Anacolini) from Peru and key to species, Zootaxa 4531 (1), pp. 134-138 : 137

Key to species of Biribellus

1. Scape almost as long as antennomere III; elytral carinae well-marked. Males...................................... 2

- Scape distinctly shorter than antennomere III; elytral carina slightly marked. Females............................... 3

2(1). Elytral punctation fine and sparse, denser near apex; elytral sutural angle spiniform; metasternal process distinctly protruding, globose, with truncate apex ( Fig. 9 ). Peru ( San Martin)..................................... B. martinsi Galileo, 1987

- Elytral punctation coarse, abundant, denser toward apex; elytral sutural angle not spiniform; metasternal process not globose, with apex nearly rounded ( Fig. 10 ). Brazil (Amazonas)................................... B. punctatus Galileo, 1987

3(1). Metaventral process globose, narrow, not longitudinally sulcate by the central discrimen ( Fig 6 ). French Guiana........................................................................................ B. huedepohli ( Galileo, 1987)

- Metaventral processes not globose, wide, longitudinally sulcate by the central discrimen ( Fig. 5 ). Peru ( Loreto)................................................................................................. B. isabelae , sp. nov.

Figures

FIGURES 9–10. 9, Biribellus martinsi, paratype male, dorsal habitus; 10, Biribellus punctatus, holotype male, dorsal habitus.

FIGURES 1–8. 1–5, Biribellus isabelae, holotype female: 1, Dorsal habitus; 2, Ventral habitus; 3, Lateral habitus; 4, Head, frontal view; 5, Metaventral process. 6–8, Biribellus huedepohli, holotype female: 6, Metaventral process; 7, Dorsal habitus; 8, Lateral habitus.