Nylanderia incallida (Santschi, 1915)

Lapolla, John S., Hawkes, Peter G. & Fisher, Brian L., 2011, Monograph of Nylanderia (Hymenoptera: Formicidae) of the World, Part I: Nylanderia in the Afrotropics, Zootaxa 3110, pp. 10-36 : 16-17

Nylanderia incallida (Santschi, 1915)

( Figs. 13–15 , 77 [worker])

Prenolepis (Nylanderia) incallida Santschi, 1915: 263 (worker described). Holotype worker, EQUATORIAL GUINEA: São Tome Island (NHMB) [examined]. Emery, 1925: 218, combination in Paratrechina (Nylanderia) ; LaPolla et al., 2010: 127, combination in Nylanderia .

Paratrechina arlesi Bernard, 1953: 257 (worker described). 3 syntype workers, GUINEA (MNHN) [examined]. LaPolla et al., 2010: 127, combination in Nylanderia . SYN. NOV.

Worker diagnosis: Overall brown, gaster with faint dorsal bands of lighter yellowish-brown along segmental lines.

Compare with: N. luteafra

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.

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

Non-type material examined. GHANA: Mampong, 7°3.641' N, 1°24.266' W *, 7 April 1970 (P. Room); IVORY COAST: Tai Forest, 5°19.343' N, 6°33.314' W *, 15 Aug 1975 (T. Diomande)

Notes. Bernard’s N. arlesi type specimens match the type specimens of N. incallida very well, which is why we propose the synonymy of N. arlesi . 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.

Figures

FIGURES 1 – 15. Afrotropical Nylanderia species in various views: boltoni (worker, 1 – 3, CASENT 0179580, Gabon); bourbonica (worker, 4 – 6, CASENT 0101309, Reunion); brevisetula (worker, 7 – 9, CASENT 0090304, Central African Republic); impolita (worker, 10 – 12, CASENT 0179589, Gabon); incallida (worker, 13 – 15, CASENT 0179576, Ivory Coast)

FIGURES 73 – 88. Scapes of Afrotropical Nylanderia species (workers only): boltoni (73, CASENT 0179580, Gabon); bourbonica (74, CASENT 0101309, Reunion); brevisetula (75, CASENT 0090304, Central African Republic); impolita (76, CASENT 0179589, Gabon); incallida (77, CASENT 0179576, Ivory Coast); jaegerskioeldi (78, CASENT 0179577, Kenya); lepida (79, CASENT 0179591, Gabon); luteafra (80, CASENT 0179584, Gabon); mendica (81, CASENT 0179590, Gabon); natalensis (82, CASENT 0396096, South Africa); scintilla (83, CASENT 0179579, Ivory Coast); silvula (84, LACMENT 272717, Kenya); umbella (85, CASENT 0179583, Cameroon); usambarica (86, CASENT 0235343, Tanzania); vaga (87, CASENT 0104253, U. S. A); vividula (88, CASENT 0103260, U. S. A.)