Acropyga dubitata

Acropyga dubitata has been collected by one collector (Aug. Busck) and is only known from the type series, all males. The specimen labels on the MCZ types contain cryptic handwritten numbers (27.9, 7-9, 14.9.05, etc.). Since these are all winged males it is possible each pin represents a flight intercept sample with the males captured on various days in Sept 1905. Every label does include a 9 but only one of these "dates" ends with an 05. Nothing is known about the biology of this apparent Hispaniola endemic. The only other species of this genus known from Hispaniola is Acropyga parvidens and it has not been associated with any males. It is possible these two species are actually one.

Identification
LaPolla (2004): Male (only known caste) with 11-12 segmented antennae; parameres short and rectangular in shape; apex of paramere with a dorsocaudal point.

Distribution based on Regional Taxon Lists
Neotropical Region: Dominican Republic, Greater Antilles.

Castes
This species is only known from males.

Nomenclature

 * . Rhizomyrma dubitata Wheeler, W.M. & Mann, 1914: 47 (m.) DOMINICAN REPUBLIC.
 * [Misspelled as dubita by Donisthorpe, 1936b: 110 (in list).]
 * Combination in Acropyga (Rhizomyrma): Emery, 1925b: 29.
 * Status as species: Emery, 1925b: 29; Donisthorpe, 1936b: 110 (in list); Weber, 1944: 98 (redescription); Kempf, 1972a: 17; Bolton, 1995b: 57; LaPolla, 2004a: 45 (redescription); Lubertazzi, 2019: 67.

Male
Length 2 mm.

Very similar to the male of Acropyga. Head a little broader than long, subrectangular. Eyes rather small, less than half as long as the sides of the head. Mandibles slender, distinctly tridentate. Clypeus convex and almost carinate in the middle, with entire, rounded anterior border. Antennae with long scapes, which reach well beyond the posterior corners of the head; first funicular joint globular, as broad as long, joints 2-7 a little broader than long, remaining joints longer. Thorax robust but not much broader than the head through the eyes. Mesonotum convex in front, slightly overarching the pronotum; scutellum not convex; epinotum rounded, sloping, without distinct base and declivity. Petiole with erect node, which is rather thick though compressed anteroposteriorly, with a blunt, rounded, entire border. Its anterior face in profile is slightly convex, its posterior face more flattened. Gaster rather short and stout; external genital valves large, with broad. bluntly bidentate tips; inner valves shorter, uneiform. Wings rather large, like those of Acropyga with one cubital cell, no discoidal cell and the radial cell closed.

Body shining throughout and very finely shagreened.

Hairs pale, erect, absent on the thorax and anterodorsal portion of the gaster, conspicuous on the petiole, venter and genitalia. Pubescence whitish, fine and rather dense, but not concealing the shining surface.

Yellow throughout; appendages scarcely paler; only tho ocellar triangle blackish or fuscous. In some specimens the body is very slightly tinged with brown. Wings yellowish gray, with colorless veins and stigma.

Measurements (LaPolla 2004): Males (n=7): TL: 1.67-2.35; HW: 0.403-0.482; HL: 0.404-0.487; SL: 0.33-0.43; ML: 0.716-0.912; GL: 0.546-0.962; CI: 91.3-101.69; SI: 81.89-92.0.

Type Material
Described from numerous specimens taken by Mr. Aug. Busck in the San Francisco Mts. of San Domingo.

LaPolla (2004) examined types from the, and  and designated a lectotype MZCZ male specimen labeled JSL TYPE # 117. DOMINICAN REPUBLIC: St. Domingo; San Francisco Mountains, 14 September 1905.

References based on Global Ant Biodiversity Informatics

 * Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
 * LaPolla J.S. 2004. Acropyga (Hymenoptera: Formicidae) of the world. Contributions of the American Entomological Institute 33(3): 1-130.
 * Perez-Gelabert D. E. 2008. Arthropods of Hispaniola (Dominican Republic and Haiti): A checklist and bibliography. Zootaxa 1831:1-530.
 * Weber N. A. 1944. The neotropical coccid-tending ants of the genus Acropyga Roger. Ann. Entomol. Soc. Am. 37: 89-122.
 * Wheeler W. M. 1935f. Ants of the genus Acropyga Roger, with description of a new species. Journal of the New York Entomological Society 43:321-329.
 * Wheeler W. M., and W. M. Mann. 1914. The ants of Haiti. Bulletin of the American Museum of Natural History 33: 1-61.