Nesomyrmex longiceps Csosz & Fisher

Csosz, Sandor & Fisher, Brian L., 2016, Taxonomy of Malagasy Nesomyrmex brevicornis species-group using conventional morphology-based approach, ZooKeys 616, pp. 125-159 : 149-150

Nesomyrmex longiceps Csosz & Fisher sp. n. Figs 30-32 , 33 , Table 1

Type material investigated.

Holotype: CASENT0488528, collection code: BLF06584, Parc National de Namoroka, 16.9 km 317° NW Vilanandro, -16.40667°, 45.31°, alt 100 m, Fisher, Griswold et al., 11.12.2002, (1w, CASC, CASENT0488528);

Paratype: CASENT0488529, collection code: BLF06584, Parc National de Namoroka, 16.9 km 317° NW Vilanandro, -16.40667°, 45.31°, alt 100 m, Fisher, Griswold et al., 11.12.2002, (1w, CASC);

Material examined.

MADAGASCAR: CASENT0400876, collection code: BLF02660, Réserve Spéciale d’Ambre, 3.5 km 235° SW Sakaramy, -12.46889°, 49.24217°, alt 325 m, Fisher, Griswold et al., 01.26.2001, (1w, CASC); CASENT0422685, collection code: BLF02660, Réserve Spéciale d’Ambre, 3.5 km 235° SW Sakaramy, -12.46889°, 49.24217°, alt 325 m, Fisher, Griswold et al., 01.26.2001, (1w, CASC);

Etymology.

This name ( longiceps ) refers to the relatively elongated head of workers of this species.

Diagnosis in key.

Description of workers. Body color: yellow. Body color pattern: concolorous. Absolute cephalic size: 531 [478, 556]. Cephalic length vs. maximum width of head capsule (CL/CWb): 1.43 [1.42, 1.46]. Postocular distance vs. cephalic length (PoOc/CL): 0.44 [0.42, 0.45]. Postocular sides of cranium contour frontal view orientation: converging posteriorly. Postocular sides of cranium contour frontal view shape: broadly convex. Vertex contour line in frontal view shape: straight. Vertex sculpture: main sculpture absent, ground sculpture absent, smooth and shiny. Setal pits on head dorsum: inconspicuous with obscure demarcation. Gena contour line in frontal view shape: straight. Genae contour from anterior view orientation: converging. Gena sculpture: ground sculpture areolate, main sculpture costulate. Concentric carinae laterally surrounding antennal foramen: present. Eye length vs. absolute cephalic size (EL/CS): 0.22 [0.21, 0.23]. Frontal carina distance vs. absolute cephalic size (FRS/CS): 0.26 [0.25, 0.28]. Longitudinal carinae on median region of frons: absent. Smooth median region on frons: present. Antennomere count: 12. Scape length vs. absolute cephalic size (SL/CS): 0.63 [0.61, 0.65]. Median clypeal notch: present. Ground sculpture of submedian area of clypeus: present. Median carina of clypeus: absent. Metanotal depression: present. Dorsal region of mesosoma sculpture: imbricate, main sculpture absent. Lateral region of pronotum sculpture: ground sculpture areolate, main sculpture absent. Mesopleuron sculpture: ground sculpture areolate, main sculpture absent. Metapleuron sculpture: ground sculpture areolate, main sculpture absent. Petiole width vs. absolute cephalic size (PEW/CS): 0.19 [0.19, 0.19]. Dorsal region of petiole sculpture: ground sculpture areolate, main sculpture dispersed rugose. Postpetiole width vs. absolute cephalic size (PPW/CS): 0.27 [0.26, 0.28]. Dorsal region of postpetiole sculpture: ground sculpture smooth, main sculpture absent. Surface of first gastral tergite: imbricate sculpture absent.

Distribution.

This species is known to occur in northwestern Madagascar from 100-325 m ( Fig. 33 ). The known samples were collected in tropical dry forests.

Figures

Figure 33. Geographic distribution of Nesomyrmex longiceps sp. n .. The known localities of Nesomyrmex longiceps sp. n. in Madagascar.

Figures 30 - 32. Nesomyrmex longiceps sp. n. holotype worker (CASENT 0488528). Head in full-face view (30), dorsal view of the body (31), lateral view of the body (32).