Taxonomy of Malagasy Nesomyrmex brevicornis species-group using conventional morphology-based approach Author Csosz, Sandor Author Fisher, Brian L. text ZooKeys 2016 616 125 159 http://dx.doi.org/10.3897/zookeys.616.9532 journal article http://dx.doi.org/10.3897/zookeys.616.9532 1313-2970-616-125 E4D6582A4A834307A78027EAE7CA4FF2 FF97FFB6FFFDD150FFD7FFB10A650C1D 153845 Nesomyrmex brunneus Csosz & Fisher sp. n. Figs 14-16 , 17 , Table 1 Type material investigated. Holotype : CASENT0919844, collection code: ANTC1302, P.N. Masoala, 40 km 154° SSE Maroantsetra, -15.72667°, 49.95667°, alt 150 m, A. Dejean et al., 10.14.2001 (1w, CASC, CASENT0919844); Paratypes : eight workers and two gynes from the same locality under CASENT codes: CASENT0004957, collection code: ANTC1302, (2w, CASC); CASENT0004958, collection code: ANTC1302, (1Q, CASC); CASENT0004959, collection code: ANTC1302, (1Q, CASC); CASENT0008660, collection code: ANTC1302, (2w, CASC, CASENT0008660); CASENT0008661, collection code: ANTC1302, (2w, CASC); CASENT0008662, collection code: ANTC1302, (2w, CASC); Material examined. MADAGASCAR: CASENT0066844 , collection code: BLF13087, Ile Sainte Marie, Foret Kalalao, 9.9 km 34° Ambodifotatra, -16.9225°, 49.88733°, alt 100 m, B.L.Fisher et al., 11.26.2005, (1w, CASC); CASENT0082404 , collection code: MA-01-01D-07, Parc National Montagne d'Ambre [Petit Lac road], -12.52028°, 49.17917°, alt 1125 m, R. Harin'Hala , 04.05.2001, (1w, CASC, CASENT0082404); CASENT0083199 , collection code: MA-01-01D-09, Parc National Montagne d'Ambre [Petit Lac road], -12.52028°, 49.17917°, alt 1125 m, R. Harin'Hala , 04.26.2001, (1w, CASC); CASENT0107525 , collection code: BLF11668, Nosy Be Airport, 10.3 km 30° Hell Ville, -13.32017°, 48.31083°, alt 25 m, B.L.Fisher, 12.11.2004, (1w, CASC, CASENT0107525); CASENT0138300 , collection code: BLF20144, Manerinerina, 76.6 km N Antsohihy, -14.10744°, 48.11046°, alt 247 m, B.L.Fisher et al., 04.11.2008, (1w, CASC, CASENT0138300); CASENT0195102 , collection code: PSW11939, 9km NNW Ranohira, P.N. Isalo, -22.48333°, 45.38333°, alt 800 m, P.S.Ward, 2.16.1993, (2w, PSWC); CASENT0195103 , collection code: PSW11943, 9km NNW Ranohira, P.N. Isalo, -22.48333°, 45.38333°, alt 800 m, P.S.Ward, 02.16.1993, (2w, PSWC); CASENT0418178 , collection code: BLF04708, Parc National de Masoala, 39.4 km 150° SSE Maroantsetra, -15.71°, 49.97°, alt 200 m, B.L.Fisher, H.J.Ratsirarson, 11.28.2001, (2w, CASC); CASENT0418217 , collection code: BLF04724, Parc National de Masoala, 39.4 km 150° SSE Maroantsetra, -15.71°, 49.97°, alt 200 m, B.L.Fisher, H .J.Ratsirarson, 11.28.2001, (1w, CASC); CASENT0418218 , collection code: BLF04723, Parc National de Masoala, 39.4 km 150° SSE Maroantsetra, -15.71°, 49.97°, alt 200 m, B.L.Fisher, H.J.Ratsirarson, 11.28.2001, (1w, CASC); CASENT0418234 , collection code: BLF04696, Tampolo, Masoala Peninsula, 40.4 km 154° SSE Maroantsetra, -15.73°, 49.96°, alt 30 m, B.L.Fisher, H.J.Ratsirarson, 11.28.2001, (2w, CASC); CASENT0418244 , collection code: BLF04711, Parc National de Masoala, 39.4 km 150° SSE Maroantsetra, -15.71°, 49.97°, alt 200 m, B.L.Fisher, H.J.Ratsirarson, 11.28.2001, (2w, CASC); CASENT0418285 , collection code: BLF04710, Parc National de Masoala, 39.4 km 150° SSE Maroantsetra, -15.71°, 49.97°, alt 200 m, B.L.Fisher, H.J.Ratsirarson, 11.28.2001, (2w, CASC); CASENT0428256 , collection code: BLF02660, Reserve Speciale d'Ambre , 3.5 km 235° SW Sakaramy, -12.46889°, 49.24217°, alt 325 m, Fisher, Griswold et al., 01.26.2001, (1w, CASC); CASENT0488569 , 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, CASENT0488569); MCZENT0576251 9km NNW Ranohira, P.N. Isalo, -22.48333°, 45.38333°, alt 800 m, P.S.Ward, 02.16.1993, (2w, MCZC); MCZENT0576252 , collection code: 11939, 9km NNW Ranohira, P.N. Isalo, -22.48333°, 45.38333°, alt 800 m, P.S.Ward, 02.16.1993, (2w, MCZC); MCZENT0576253 , collection code: 11939, 9km NNW Ranohira, P.N. Isalo, -22.48333°, 45.38333°, alt 800 m, P.S.Ward, 02.16.1993, (2w, MCZC). Etymology. This name ( brunneus ) refers to the concolorous dark brown appearance of the workers of this species. Diagnosis in key. Description of workers. Body color: dark brown; black. Body color pattern: concolorous. Absolute cephalic size: 721 [620, 808]. Cephalic length vs. maximum width of head capsule (CL/CWb): 1.14 [1.09, 1.21]. Postocular distance vs. cephalic length (PoOc/CL): 0.44 [0.39, 0.47]. 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: convex. Genae contour from anterior view orientation: converging; strongly converging. Gena sculpture: ground sculpture areolate, main sculpture absent. Concentric carinae laterally surrounding antennal foramen: present. Eye length vs. absolute cephalic size (EL/CS): 0.22 [0.20, 0.24]. Frontal carina distance vs. absolute cephalic size (FRS/CS): 0.33 [0.31, 0.35]. Longitudinal carinae on median region of frons count: absent. Smooth median region on frons: present. Antennomere count: 12. Scape length vs. absolute cephalic size (SL/CS): 0.64 [0.60, 0.67]. 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: ground sculpture areolate, 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): 0.20 [0.19, 0.22]. Dorsal region of petiole sculpture: ground sculpture areolate , main sculpture absent. Postpetiole width vs. absolute cephalic size (PPW/CS): 0.26 [0.24, 0.29]. Dorsal region of postpetiole sculpture: ground sculpture areolate, main sculpture absent. Surface of first gastral tergite: continuously imbricate. Figures 14-16. Nesomyrmex brunneus sp. n. holotype worker (CASENT0919844). Head in full-face view ( 14 ), dorsal view of the body ( 15 ), lateral view of the body ( 16 ). Distribution. This species occurs predominantly in rainforests of northern Madagascar from 25-800 m. The only southern population is reported from a rain forest of Isalo National Park ( Fig. 17 ). The known samples are collected from canopy: canopy moss and leaf litter or rotten pockets of live branches. Figure 17. Geographic distribution of Nesomyrmex brunneus sp. n.. The known localities of Nesomyrmex brunneus sp. n. shown in Madagascar.