Biraoeme, Santos-Silva & Nascimento & Botero, 2023

Santos-Silva, Antonio, Nascimento, Francisco Eriberto de L. & Botero, Juan Pablo, 2023, Taxonomy of Oemini (Coleoptera: Cerambycidae: Cerambycinae), with key to American genera, notes and new taxa, Journal of Natural History 57 (41 - 44), pp. 1917-1948 : 1927

Biraoeme gen. n.

( Figures 16–23 )

Sepaicutea Martins 1997: 92 (rev.).

Type species. Sepaicutea unicolour Martins, 1981 , here designated.

Etymology. The new genus is named after the late Ubirajara Ribeiro Martins de Souza (Bira), plus the generic name Oeme . Feminine gender.

Description. Head and prothorax without long and abundant erect setae. Frons transverse, short. Eyes not divided; upper eye lobes wide, distance between them slightly greater than width of one upper lobe (as wide as one upper lobe in females of S. unicolour ); lower eye lobes large, almost occupying the entire sides of the head. Maxillary palpus about twice length of labial palpus. Antennae distinctly longer than body length in both sexes, longer in male; scape without apical cicatrix; pedicel short, about as long as apical diameter of scape; antennomeres filiform, without apical projection, without ventral asperities or spines. Prothorax slightly transverse; posterior constriction well marked; sides with small conical tubercle in male, larger in female. Pronotum without asperities. Prosternal process noticeably narrow centrally, gradually, and slightly widened towards apex. Mesoventral process in male narrow, parallel-side, with truncate apex; in female, more triangular. Metepisternum narrow, width about 1/6 of length. Elytra subparallel-sided from humeri to about posterior quarter; apices together rounded; elytral carinae present, from slightly to well marked. Femora slightly pedunculate-clavate.

Remarks. Biraoeme gen. n. differs from Sepaicutea ( Figures 9, 10 ) as follows: posterior constriction of the prothorax well marked ( Figures 16, 23 ); lateral tubercles of the prothorax short, somewhat conical, especially in female ( Figure 23 ); prosternal process ( Figure 21 ) noticeably narrowed centrally and gradually and slightly widened towards apex. In Sepaicutea , the posterior constriction of the prothorax is not well marked, the lateral tubercles of the prothorax are very long and spiniform in both sexes ( Figure 9 ), and the prosternal process ( Figure 10 ) is distinctly narrowed centrally, but noticeably widened apically.

Key to species of Biraoeme

1. Elytral carinae weekly marked; elytra proportionally shorter in female (about 3.6 times as long as humeral width) ( Figures 16–23 ). Venezuela – .......................................... ................................................................................................................ B. unicolour ( Martins, 1981)

- Elytral carinae well marked; elytra proportionally longer in female (about 4.2 times as long as humeral width). Unknown male. Bolivia – .................................................................... ........................................................................................... B. costata (Martins and Galileo, 2005)

Note: We did not examine specimens of Biraoeme costata (see photograph of Bezark 2023a).

Figures

Figures 16–23. Biraoeme unicolour (Martins, 1981). (16–21) Male: (16) dorsal habitus; (17) ventral habitus; (18) lateral habitus; (19) head, frontal view; (20) upper eye lobes; (21) prosternal and mesoventral processes. (22–23) Female: (22) upper eye lobes; 23) dorsal habitus.

Figures 9–15. (9–10) Sepaicutea fisheri Lane, 1972, female: (9) dorsal habitus; (10) ventral habitus. (11–15) Liberedaxia deslauriersi Alten, Alten and Ramey, 2009, holotype male (by Eugenio H. Nearns): (11) dorsal habitus; (12) ventral habitus; (13) lateral habitus; (14) head, frontal view; (15) thorax, ventral habitus.