Eurhopalothrix species

Celante, Gabriel Luiz, Barbosa Celante, Julia Mariah Galdino, de Sales Nunes, Vladimir & Jahyny, Benoit Jean Bernard, 2024, Eurhopalothrix oxente sp. nov. (Hymenoptera: Formicidae), a new riparian species of São Francisco River, northeastern Brazil, Revista Chilena de Entomología 50 (2), pp. 213-225 : 221-222

Key to the South American group of Eurhopalothrix species, with a key to the bruchi group species (first step modified from Brown & Kempf 1960: key to the species of Eurhopalothrix in the New World (workers and females)

1. Pilosity uniform and evenly distributed, consisting of numerous small, oval, subappressed squamiform hairs over dorsal surfaces of body, legs and scapes; no specialized erect hairs ( Fig. 5A ) ...................................................................... bruchi group 2

- Pilosity differentiated into smaller appressed and subappressed ground hairs and larger specialized (erect clavate or pompon-like) hairs arranged in a symmetrical pattern ( Fig. 5B ) .......................................................................................................................... bolaui group

2 Clypeus convex posteriorly and anterior margin relatively straight, with the lateral margins clearly surpassing the width of the frontal lobes; mandibles with a long and tapered fourth tooth, proximal teeth curved towards the clypeus ( Fig. 5C ) ...................... ...................................................................................................... Eurhopalothrix oxente sp. nov.

- Clypeus posteriorly convex and anteriorly concave, lateral margins with approximately the same width as the frontal lobes; mastigatory margin with about 10 very fine and relatively uniform spiniform teeth ( Fig. 5D ) ...................................... Eurhopalothrix bruchi

Figures

Figure 5. Images of some species of Eurhopalothrix. A-C. Eurhopalothrix oxente sp. nov. (holotype). B. Eurhopalothrix bolaui. D. Eurhopalothrix bruchi (syntype). A-B. Dorsal view. C-D. Details of the posterior of the head in frontal view. The blue line represents the width of the frontal lobes, and the green line represents the width of the clypeus. The outline of the anterior margin of the clypeus is represented in red. / Figura 5. Imágenes de algunas especies de Eurhopalothrix. A-C. Eurhopalothrix oxente sp. nov. (holotipo). B. Eurhopalothrix bolaui. D. Eurhopalothrix bruchi (sintipo). A-B. Vista dorsal. C-D. Detalles de la parte posterior de la cabeza en vista frontal. La lÍnea azul representa el ancho de los lóbulos frontales, y la lÍnea verde representa el ancho del clÍpeo. El contorno del margen anterior del clÍpeo está representado en rojo.