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Polyrhachis emeryana
| Polyrhachis emeryana | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Formicinae |
| Tribe: | Camponotini |
| Genus: | Polyrhachis |
| Subgenus: | Cyrtomyrma |
| Species: | P. emeryana |
| Binomial name | |
| Polyrhachis emeryana Mann, 1919
| |
Nothing is known about the biology of Polyrhachis emeryana.
Identification
Polyrhachis emeryana is very similar to Polyrhachis expressa from Cape York Peninsula. Both species have widely rounded pronotal shoulders, a propodeum armed with spines and distinctly elongated lateral petiolar spines. However, P. expressa differs by its finer sculpturation, notably on the dorsum of the head and mesosoma, and its less convex pronotal dorsum. The propodeal spines in P. expressa are quite long, columnar and bluntly terminated, while in P. emeryana they are short, triangular and acute. Also, the appressed pubescence in P. expressa is extremely short and inconspicuous, while it is distinctly longer and more prominent in P. emeryana. (Kohout 2006)
Keys including this Species
Distribution
Polyrhachis emeryana appears to be rare and restricted to the Solomons.
Latitudinal Distribution Pattern
Latitudinal Range: -9° to -9°.
| North Temperate |
North Subtropical |
Tropical | South Subtropical |
South Temperate |
- Source: AntMaps
Distribution based on Regional Taxon Lists
Indo-Australian Region: Solomon Islands (type locality).
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Countries Occupied
| Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species. |
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Estimated Abundance
| Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species. |
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Abundance
Rare.
Biology
Castes
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- emeryana. Polyrhachis (Cyrtomyrma) emeryana Mann, 1919: 390, fig. 59 (w.) SOLOMON IS. See also: Kohout, 2006b: 139.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description. From Kohout (2006): In lieu of the apparently misplaced holotype, my concept of the species is based on a voucher specimen (The Natural History Museum) evidently compared with the holotype by Than (1978), and a few additional specimens collected by P. Greenslade at Mt Austen (Guadalcanal, Solomon Is) (Australian National Insect Collection, Queensland Museum).
Description
Worker
Length 5 mm.
Head a little broader than long, broadly rounded behind and rather strongly narrowed in front. Clypeus only moderately convex, shallowly concave at middle of anterior border. Frontal carinae little divergent, extending to opposite middle of eyes, in profile elevated and evenly rounded in front. Antennal scapes surpassing occipital corners by about five eighths of their length. Pronotum broader than long. strongly convex above. Mesoepinotum little convex, the suture indicated by a very shallow and indistinct impression; subangulate between base and declivity. Epinotal spines nearly straight, a little shorter than their distance apart at base. Petiolar node subtriangular in profile, the dorsal edge margined and bearing four spines, the inner pair of which are triangular, as broad basally as long, and the outer elongate-triangular, acute apically and four times as long as the inner pair.
Moderately shining. Finely coriaceous and with minute punctation.
Very fine and short recumbent pubescence thinly distributed on head, body, and appendages.
Color black.
Type Material
SOLOMON IS, Malaita, Auki, col. W.M. Mann. The single type, a holotype worker, cannot be found - as reported by Kohout (2006).
References
- Mann, W.M. 1919. The ants of the British Solomon Islands. Bulletin of the Museum of Comparative Zoology at Harvard College 63: 273-391. (page 390, fig. 59 worker described)
- Kohout, R. J. 2006. Review of Polyrhachis (Cyrtomyrma) Forel (Hymenoptera: Formicidae: Formicinae) of Australia, Borneo, New Guinea and the Solomon Islands with descriptions of new species. Memoirs of the Queensland Museum. 52:87-146.
References based on Global Ant Biodiversity Informatics
- Kohout R.J. 2006. Review of Polyrhachis (Cyrtomyrma) Forel of Australia, Borneo, New Guinea and the Solomon Islands with descriptions of new species. Memoirs of the Queensland Museum 52: 87-146.
- Mann W. M. 1919. The ants of the British Solomon Islands. Bulletin of the Museum of Comparative Zoology 63:273-391.
- Mann William. 1916. The Ants of the British Solomon Islands. Bulletin of the Museum of Comparative Zoology at Harvard College 63(7): 273-391
- Mann, W.M. 1919. The ants of the British Solomon Islands. Bulletin of the Museum of Comparative Zoology of Harvard College 63: 273-391
- Wheeler W.M. 1935. Check list of the ants of Oceania. Occasional Papers of the Bernice Pauahi Bishop Museum 11(11):1-56.
- Wheeler, William Morton.1935.Checklist of the Ants of Oceania.Occasional Papers 11(11): 3-56