Nylanderia incallida

Identification
LaPolla et al. (2011) - Overall brown, gaster with faint dorsal bands of lighter yellowish-brown along segmental lines.

Compare with: Nylanderia luteafra

The faint dorsal bands of lighter yellowish-brown along the segmental lines of the gaster observed in N. incallida make this a fairly easy species to indentify and separates it from N. luteafra, to which it is most likely to be confused.

Distribution
This taxon was described from São Tomé & Principe (São Tomé Island). It is also known from Equatorial Guinea, Ghana and Ivory Coast.

Castes
The queen and male castes are currently unknown for this species.

Nomenclature

 *  incallida. Prenolepis (Nylanderia) incallida Santschi, 1915c: 263, fig. 12 (w.) SÃO TOMÉ & PRINCIPE (São Tomé I.). Combination in Paratrechina (Nylanderia): Emery, 1925b: 218; in Nylanderia: LaPolla, Brady & Shattuck, 2010a: 127. Senior synonym of arlesi: LaPolla, Hawkes & Fisher, 2011: 16.
 * arlesi. Paratrechina (Nylanderia) arlesi Bernard, 1953b: 257, fig. 15 (w.) GUINEA. Combination in Nylanderia: LaPolla, Brady & Shattuck, 2010a: 127. Junior synonym of incallida: LaPolla, Hawkes & Fisher, 2011: 16.

Worker
Measurements (n = 6): TL: 2.5–2.7; HW: 0.5–0.6; HL: 0.6–0.7; EL: 0.14–0.16; SL: 0.74–0.8; PW: 0.4–0.43; WL: 0.81–0.85; GL: 1.1–1.18

Indices: CI: 82–87; REL: 23–25; SI: 139–147.

Overall yellowish brown, with lighter brown to yellow antennae and legs; head with lighter brown to yellow patch medially around torulae distally including all of clypeus; gaster with faint dorsal bands of lighter color along segmental lines towards acidopore; head, metanotal area and mesopleuron faintly rugulose, otherwise cuticle smooth and shining; trochanters, mesocoxae, and metacoxae yellowish-brown to whitish. Head with a layer of pubescence; posterior margin with slightly angular posterolateral corners; scapes surpass posterior margin by about the length of the first 3–3.5 funicular segments; scapes with scattered erect macrosetae and a layer of pubescence (SMC = 20–24). Mesosoma with erect macrosetae of varying lengths (PMC = 3–6, MMC = 2–4); metanotal area elongate and rugulose; dorsal face of propodeum dome-like, at about the same height as mesonotum; dorsal and declivitous face about the same length; propodeum with scattered pubescence, especially on dorsal face. Gaster with abundant erect macrosetae and scattered pubescence.

Type Material
Holotype worker, EQUATORIAL GUINEA: São Tome Island [examined].

Paratrechina arlesi 3 syntype workers, GUINEA [examined].

Additional References

 * LaPolla, J.S., Hawkes, P.G. & Fisher, B.L. (2011) Monograph of Nylanderia (Hymenoptera: Formicidae) of the World, Part I: Nylanderia in the Afrotropics. Zootaxa 3110: 10–36.