Hylomyrma mitiae

Most specimens were found in leaf-litter samples, which suggests that nests are located in fallen logs, rotten wood, between leaves, or inside natural cavities of the superficial soil layers. (Ulyssea & Brandao, 2021)

Identification
Vermicular to vermiculated-areolated striae on head dorsum and mesosoma; dorsal margin of petiole continuous, ventral surface smooth; longitudinal and anastomosed striae on postpetiole and tergum of first gastral segment; subpostpetiolar process prominent, subtriangular; profemur posterior surface and protibia extensor surface entirely striate; striae on tergum of first gastral segment shorter than postpetiole length; 2 short branches of equal size diverging from the main axis.

Hylomyrma mitiae is similar to Hylomyrma virginiae and Hylomyrma sagax. All three are allopatric, but nevertheless occur in northwestern South America. Hylomyrma mitiae has been recorded only in French Guiana (Fig. 87), H. sagax is restricted to southeast Colombia (Fig. 83), whereas H. virginiae has been recorded in Ecuador (both sides of The Andes) and in western Colombia (Fig. 89).

Hylomyrma mitiae can be distinguished from H. virginiae (characteristic in parentheses) by the comparatively larger body, TL 5.27–5.52 mm, WL 1.41–1.52 mm (vs. smaller, TL 4.94–5.20 mm, WL 1.24–1.40 mm), the gena and laterodorsal region of head are covered with very thin striae between the vermicular to vermiculated-areolated striae (vs. very thin striae superimposed on vermicular to vermiculated-areolated striae), the metanotal groove distinguished by a slight depression (vs. indistinct), the continuous dorsal margin of petiole (vs. discontinuous), and the very prominent and subtriangular subpostpetiolar process (vs. weak and slightly convex).

Hylomyrma mitiae is distinguished from H. sagax by the pair of medium sized teeth laterally at the clypeus anterior margin (vs. large teeth), the presence of smooth interspaces between the vermicular striae only on the mesosomal dorsum (vs. on the entire mesosoma), and the subtriangular subpostpetiolar process (vs. convex).

Distribution based on Regional Taxon Lists
Neotropical Region: French Guiana.

Nomenclature

 * . Hylomyrma mitiae Ulysséa, in Ulysséa & Brandão, 2021: 80, figs. 53, 54, 80D, 81H, 87 (w.q.) FRENCH GUIANA.
 * Type-material: holotype worker, 16 paratype workers, 1 paratype queen.
 * Type-locality: holotype French Guiana: Mitaraka Mts, Pente, 2.238226N, -54.45203, 4.iii.2015, winkler 48h, A-P2-8, MI15-0380-25 (J. Orivel & F. Petitclerc); paratypes: 10 workers with same data, 3 workers, 1 queen with same data but Plateau, 3.iii.2015, A-P1-12, MI15-0344-62, 1 worker Maripasoula, vii.1999 (S. Durou), 2 workers Nouragues Natural Reserve Station, 102 km. SW Cayenne, 145 m., 21.viii.-1.ix.2018, rainforest, Ant Course 2018 (no collector’s name).
 * Type-depositories: MZSP (holotype); CASC, CPDC, DZUP, IAVH, MCZC, MZSP, USNM (paratypes).
 * Distribution: French Guiana.

Type Material

 * Holotype: GUYANE FRANÇAISE: [Saint-Laurent-du-Maroni: Maripasoula], Mitaraka Mts, Pente, 2.238226N -54.45203, 04.iii.2015, J. Orivel & F. Petitclerc cols., winkler 48h, A-P2-8, MI15-0380-25 (1W) (MZSP67401) [MZSP].
 * Paratypes: same data as holotype (3W) [CASC, DZUP, IHVL]; (7W) (MZHY223) [MZSP]; same except Plateau, 2.243615N -54.45882, 03.iii.2015, J. Orivel & F. Petitclerc cols., winkler 48h, A-P1-12, MI15-0344-62 (1W 2Q, one worker and one queen covered with gold) (MZSP67403, MZSP67402, MZSP67404) [MZSP]; (2W) [MCZC, USNM]; Maripasoula, vii.1999, S. Durou (1W) [CEPLAC]; [Cayenne]: Nouragues Natural Reserve Station, 102km SW of Cayenne, lat 4.08799, lon -52.67978, 145m, 21.viii-1.ix.2018, Rainforest, Ant Course 2018 (2W) (MZHY224) [MZSP].