Difference between revisions of "Pseudomyrmex subater"
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Revision as of 19:29, 17 December 2018
(Wheeler, W.M. & Mann, 1914)
Known from Central America, the Greater Antilles and the Bahamas.
- 1 Identification
- 2 Distribution
- 3 Biology
- 4 Castes
- 5 Nomenclature
- 6 References
Ward (1985) - P. subater, originally described as a subspecies of Pseudomyrmex elongatus, was recognized as a distinct species by Creighton (1955). It may be distinguished from P. elongatus and Pseudomyrmex cubaensis by the shinier integument, conspicuous pilosity (grading insensibly from appressed pubescence to fine suberect and erect setae), broad head (CI 0.83-0.88), short eyes (REL2 0.54-0.58 in P. subater, > 0.62 in P. elongatus and P. cubaensis), distinct petiolar shape (gradually inclined anterior face rounded into a sharply declining posterior fact: so that NI 0.61-0.72), and conspicuous anteroventral tooth on the postpetiole. Apart from two "cotype" workers in the MCZ from Haiti, I have seen material of P. subater (misidentifif:d as P. elongatus) from the Bahamas (Andros Island, Nassau) and the same, or a closely related species, from Jamaica (Kingston). Wheeler's (1905) record of "elongatus" from the Bahamas appears to be based on a combination of P. subater and P. cubaensis, judging from material in the MCZ.
Recent collections of P. subater from the Bahamas by Blaine Cole show that this species has striking bright orange queens, which look superficially like those of Pseudomyrmex pallidus. Cole also made a collection from a single Cladium culm which contained both P. subater and P. cubaensis workers. These findings suggest that Wheeler's (1905) and Mann's (1920) records of dulotic associations between "flavidula" and "elongata" may have been based in part on pure colonies of P. subater, or mixed colonies of P. subater and P. cubaensis.
Keys including this Species
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Ward (1996) - Queens are unusually small for the genus, being about the same size as the workers.
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- subater. Pseudomyrma elongata subsp. subatra Wheeler, W.M. & Mann, 1914: 19 (w.) HAITI. Combination in Pseudomyrmex: Kempf, 1972a: 224. Raised to species: Kempf, 1972a: 224. See also: Ward, 1985b: 228; Ward, 1990: 486.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Length 4-4.5 mm.
Differing from the typical elongata and the preceding variety in having the head somewhat shorter, the base of the epinotum shorter, more convex, and more rounded, so that it passes into the declivity with a much less distinct angle. The petiole and postpetiole are somewhat more slender, the former narrower behind, the latter slightly longer than broad. The surface of the body, behind the anterior portion of the head, much more shining, the punctures distinct but finer than in the other forms of elongata and the color much darker, being black, with the anterior portion of the head dark brown and the mandibles, clypeus and antennae paler brown. The legs, including the tarsi, are black throughout.
Type Locality Information
Described from several workers taken at Diquini in the stems of bamboo.
- Kempf, W. W. 1972b. Catálogo abreviado das formigas da regia~o Neotropical. Stud. Entomol. 15: 3-344 (page 224, Combination in Pseudomyrmex, and raised to species)
- Ward, P. S. 1985b. The Nearctic species of the genus Pseudomyrmex (Hymenoptera: Formicidae). Quaest. Entomol. 21: 209-246 (page 228, see also)
- Ward, P. S. 1990. The ant subfamily Pseudomyrmecinae (Hymenoptera: Formicidae): generic revision and relationship to other formicids. Syst. Entomol. 15: 449-489 (page 486, see also)
- Wheeler, W. M.; Mann, W. M. 1914. The ants of Haiti. Bull. Am. Mus. Nat. Hist. 33: 1-61 (page 19, worker described)