Nylanderia xestonota, Kallal, 2019

Kallal, Robert J., 2019, Nylanderia of the World Part III: Nylanderia in the West Indies, Zootaxa 4658 (3), pp. 401-451 : 442-443

Nylanderia xestonota , sp. nov.

Figs. 100–102 (worker)

Holotype worker, CUBA: Granma: Parque Nacional Pico Turquino, 20.00800, 076.86500, +/- 150 m, 1200 m, 3 Feb 2012, R.S. Anderson #RSA2012-024 ( CASENT0630182 ) ( NMNH) ; 2 paratype workers, CUBA: Granma: Parque Nacional Pico Turquino, Cerro Joachin Peak, 20.01300, -76.83400 +/- 150 m, 3 Feb 2012, R.S. Anderson #RSA2012-022 ; 1 paratype worker, CUBA: Granma: Parque Nacional Pico Turquino, Aguada de Joachim , 20.01500, -76.84000 +/- 15 m, 1370 m, 3 Feb 2012, R.S. Anderson #RSA2012-023 ( NMNH & MCZC).

Worker diagnosis: Dark brown and distinctly shiny; gaster without pubescence; mesocoxae and metacoxae and petiole not distinctly lighter in color than mesosoma and gaster.

Compare with: N. fuscaspecula , N. sierra , N. wardi

WORKER. Measurements (n=5): TL: 1.63–2.20; HW: 0.42–0.56; HL: 0.53–0.67; EL: 0.12–0.16; SL: 0.62– 0.78; WL: 0.63–0.76; GL: 0.57–0.92. SMC: 22–30 PMC: 3–4; MMC: 2. Indices: CI: 81–90; REL: 22–24; SI: 134–145; SI2: 18–20.

Head: sides of head in full face view nearly parallel; posterolateral corners rounded; posterior margin rounded; anterior clypeal margin nearly straight; ocelli absent; eye well-developed. Mesosoma: in lateral view, pronotum convex; anterior margin of mesonotum raised slightly above posterior pronotal margin; metanotal area without a short flat area before spiracle; dorsal face of propodeum slightly convex; dorsal face of propodeum and mesonotum approximately the same height in lateral view. Color and pilosity: dark brown, with scapes, funiculi and legs becoming lighter especially distally; mandibles lighter yellowish-brown; generally, very shiny and without pubescence, except on head especially around eyes and fringe of pubescence on dorsal face of propodeum.

Other material examined: CUBA: Santiago de Cuba: Parque Nacional Gran Piedra, near La Isabellica , 20.00300, -75.61300 +/- 150 m, 1075 m, 27 Jan 2012, R.S. Anderson # RSA 2012-008.

Etymology: The species epithet is a combination of xesto (Gr. = polished) and nota (Gr. = back), in reference to the very shiny and smooth appearance of the mesosoma.

Notes: With their dark brown and very shiny appearance, workers of this species should be fairly easy to separate from other Cuban Nylanderia . It is similar in size to N. sierra , but unlike N. sierra , its mesonotum and gaster have no pubescence. In several features, workers of N. xestonota are most morphologically similar to workers of N. fuscaspecula from Hispaniola. They can be separated on two main features of the worker. In N. fuscaspecula the mesocoxae, metacoxae and petiole are all lighter brown in color and therefore contrasting distinctly with the remainder of the mesosoma. Whereas in N. xestonota those structures are dark in color and similar to the overall color of the mesosoma. Additionally, N. xestonota scapes typically have more macrosetae on them (range in N. xestonota 22–30, with an average of 27 macrosetae; the average macrosetae count in N. fuscaspecula is 23 with a range of 18–24).

Figures

FIGURES 100–102. Nylanderia xestonota worker CASENT0630182. Lateral, full-face, and dorsal view of the body.