Anochetus emarginatus

Anochetus emarginatus is an arboreal or semi-arboreal forager that often nests in hollow branches, epiphytes, or between palm leaf bases well above ground level (Brown 1978).

Distribution based on Regional Taxon Lists
Neotropical Region: Brazil, Colombia, French Guiana, Grenada, Guyana, Lesser Antilles, Mexico, Suriname, Trinidad and Tobago, Venezuela.

Biology
Gibson et al. (2018) found Anochetus horridus and Anochetus emarginatus have slower strikes relative to the other species of Anochetus and Odontomachus, reaching mean maximum rotational velocity and acceleration of around 1.3 9 10 4 rad s -1 and 2 9 10 8 rad s -2, respectively. The mass-specific power output of these and other species in these two genera confirm their mandible strikes are power amplified, i.e., in addition to muscle contraction energy, the acceleration of the mandibles is enhanced by mechanical structures that are adapted for, and form part of, their trap-jaws. These species and other measured species in Anochetus and Odontomachus follow a pattern of increasingly energetic strikes with larger body mass. This relationship appears to be primarily driven by an increase in mandible mass with larger body size.

Nomenclature

 *  emarginatus. Myrmecia emarginata Fabricius, 1804: 426 (w.) CENTRAL AMERICA. Wheeler, G.C. & Wheeler, J. 1952c: 644 (l.). Combination in Odontomachus: Illiger, 1807: 194; in Stenomyrmex: Mayr, 1862: 711; in Anochetus: Emery, 1890a: 63. Senior synonym of quadrispinosus: Roger, 1862c: 289; of rugosus: Kempf, 1964f: 238. See also: Brown, 1978c: 609.
 * quadrispinosus. Odontomachus quadrispinosus Smith, F. 1858b: 78, pl. 5, figs. 15-17 (w.) BRAZIL. Junior synonym of emarginatus: Roger, 1862c: 289.
 * rugosus. Anochetus (Stenomyrmex) emarginatus r. rugosus Emery, 1890a: 63 (w.) BRAZIL. Mann, 1916: 418 (m.); Wheeler, G.C. & Wheeler, J. 1952c: 645 (l.). [Unresolved junior secondary homonym of Odontomachus rugosus Smith, above.] Junior synonym of emarginatus: Kempf, 1964f: 238.

Odontomachus quadrispinosus

Holotype worker in. Labelled “Brazil” and also with a Farren White label. It is probable that this determination is spurious, a secondary labelling by Farren White, who seems to have had a habit of throwing away original data labels and substituting his own. Also in are two quadrispinosus workers with the data, “Para 48/133.” Acc. Reg.: “1848 no. 133. Para. Bt of Stevens. Collected by Mssrs Bates & Wallace.” One of these specimens is sublabelled “172.” I suspect that all three together constituted the original syntype series.