Pseudomyrmex pallidus
| Pseudomyrmex pallidus | |
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| Pseudomyrmex pallidus worker | |
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| Species: | P. pallidus
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| Binomial name | |
| Pseudomyrmex pallidus (F. Smith, 1855)
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Pseudomyrmex pallidus is a species of ant found in the Nearctic ecozone with an extensive range throughout the southern United States to Central America.[citation needed]
Morphology
Workers are yellow, orange, or brown. They are slender with large eyes, short antennal scapes and a well-developed sting.[1][2] Head widths measure 0.68–0.89 millimeters. The surface of the head is shiny, due to the lack of a fine hairy covering. Workers of P. pallidus are monomorphic.[citation needed]
Both virgin female and male reproductives are winged. Mated queens in the nest can be identified by scars on their thorax where the wings were previously attached. They can also be identified by their distended gasters. Males are dark brown, with curved antennae and small heads.[citation needed]
Habitat
Nests of this species are found in the hollow stems of dead grasses. Although they show a preference for herbaceous plants, nests have also been found in the dead stems of woody twigs.[1] Nests are generally found at the intersection of grassy and wooded habitats, possibly due to shading from the canopy in warmer months and exposure to sunlight in colder months.[3] The entrance to the colony consists of a round to oblong entrance measuring 1–2 mm (0.04–0.08 in) on the face of the stem, and can easily be plugged by the body of a single worker to prevent access to the brood by predators.[3] Stems containing P. pallidus are 5–10 mm (0.20–0.39 in) in diameter, and the excavated chambers are 11.8–72 cm (4.6–28.3 in) long.[citation needed]
Diet
Colonies reared in the laboratory will readily accept sucrose solution and dead insect parts as a food source, which suggest that their diet in the field consist of floral secretions such as nectar, and insect prey. Food stores are not found in nests collected in the field, neither are they found in colonies raised in laboratory observation nests. This implies that any food brought into the nest is directly fed to nestmates and larvae.[3]
Colony structure
Colonies are facultatively polygynous,[1][4] consisting of 1–15 queen ants and 20–200 workers. Colonies are also polydomous, where a colony consists of more than one nest site. Queenless colonies containing only brood and workers have been found, suggesting that these function as auxiliary brood rearing sites.[3] Workers are produced throughout the year, as are reproductive females. However, males appear to only be produced during the summer and the fall seasons, as they are absent from nests collected in the winter.[3]
Mating
Reproductive females can be collected from colonies throughout the year, which indicates that mating occurs in more than one season.[1] There is no specific information on the mating habits of P. pallidus.[citation needed]
References
- ^ a b c d Phillip S. Ward (1985). "The Neartic species of the genus Pseudomyrmex (Hymenoptera: Formicidae)". Quaestiones Entomologicae. 21: 209–246.
- ^ Murray S. Blum; Philip S. Callahan (1963). "The venom and poison glands of Pseudomyrmex pallidus (F. Smith)" (PDF). Psyche. 70 (2): 69–74. doi:10.1155/1963/65253. Archived from the original (PDF) on 2011-07-26. Retrieved 2011-02-12.
{{cite journal}}: Unknown parameter|lastauthoramp=ignored (|name-list-style=suggested) (help)CS1 maint: unflagged free DOI (link) - ^ a b c d e Robert S. Baldridge; Joseph DeGraffenried (1988). "Pseudomyrmex sp. (Hymenoptera: Formicidae) nesting in mimosa (Albizia julibrissin Dur.)". The Southwestern Naturalist. 33 (1): 112–114. doi:10.2307/3672102. JSTOR 3672102.
{{cite journal}}: Unknown parameter|lastauthoramp=ignored (|name-list-style=suggested) (help) - ^ Gabriel Debout; Bertrand Schatz; Marianne Elias; Doyle McKey (2007). "Polydomy in ants: what we know, what we think we know, and what remains to be done" (PDF). Biological Journal of the Linnean Society. 90: 319–348. doi:10.1111/j.1095-8312.2007.00728.x. Archived from the original (PDF) on 2011-07-18. Retrieved 2011-02-12.
External links
- AntBlog a website dedicated to the study of ant colonies
- AntBase - a taxonomic database with literature sources
Media related to Pseudomyrmex pallidus at Wikimedia Commons
