Key to Technomyrmex of Taiwan

This worker key is based on: Yamane, S., Leong, C.-M., and Lin, C.C. 2018. Taiwanese species of the ant genus Technomyrmex (Formicidae: Dolichoderinae). Zootaxa 4410:35–56. (DOI 10.11646/zootaxa.4410.1.2).

1

Figure 9. Yamane et al. 2018. Figure 1. Technomyrmex workers. Clypeus: A, Technomyrmex formosensis (YLL12) & B, Technomyrmex brunneus (LCM00042). Habitus (profile): C, Technomyrmex formosensis (YLL12) & D, Technomyrmex horni (LCM00066). Mandible: E, Technomyrmex brunneus (LCM00042) & F, Technomyrmex albipes (LCM00068). Vertex: G, Technomyrmex difficilis (LCM00067) & H, Technomyrmex albpies (LCM00068).

Frontal carina and dorsum of frons immediately mesad of frontal carina without standing hairs. Anterior margin of clypeus with large median emargination (Fig. 1A). Gastral tergite I without standing hairs. TL greater than 2.5 (generally >3). Body brown to blackish brown but in one species partly yellowish brown...bicolor group.... . . . . 2

Frontal carina generally with two standing hairs. Anterior margin of clypeus nearly straight, at most very shallowly emarginate (Fig. 1B). Gastral tergite I with many standing hairs. TL less than 2.5 (often <2). Body almost entirely blackish brown except for part of legs...albipes group.... . . . . 3

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return to couplet #1

Body entirely dark brown to black, rarely with brownish tinge on head and mesosoma. With mesosoma in profile, dorsal outline of propodeum convex, rounded into declivity without . . . . . Technomyrmex formosensis

Head and gaster brown to dark brown, mesosoma yellowish brown, showing more or less bicolorous pattern, but body sometimes uniformly light brown. With mesosoma in profile, dorsal outline of propodeum straight to weakly convex, often with weak impression posteriorly; straight-line length of dorsal face of propodeum greater than depth of propodeal declivity to spiracle (Fig. 1D) . . . . . Technomyrmex horni

3

return to couplet #1

Mandible with distinct longitudinal groove on its dorsal face along outer margin (Fig. 1E). With head in profile, eye located at or slightly behind midlength of head . . . . . Technomyrmex brunneus

Mandible without longitudinal groove along outer margin (Fig. 1F). With head in profile, eye located more anteriorly on head, in front of midlength . . . . . 4

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return to couplet #3

Dorsum of head behind level of posterior margin of eye without standing hairs (Fig. 1H) . . . . . Technomyrmex albipes

Dorsum of head behind level of posterior margin of eye with a pair of standing hairs (Fig. 1G) . . . . . Technomyrmex difficilis