Polyrhachis inermis
| Polyrhachis inermis | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Formicinae |
| Tribe: | Camponotini |
| Genus: | Polyrhachis |
| Subgenus: | Myrma |
| Species: | P. inermis |
| Binomial name | |
| Polyrhachis inermis Smith, F., 1858
| |
| Synonyms | |
| |
Contents
Identification
A member of the Polyrhachis inermis species group in the subgenus Myrma
Kohout (2008) - The holotype worker of P. inermis is very similar to specimens from Dumoga-Bone NP and other recently collected material from elsewhere in Sulawesi. However, the modern specimens are generally more slender than the holotype, due to a narrow pronotal dorsum. Their pronotal spines are also slightly less divergent, with the lateral pronotal margins at the bases of spines less emarginate. In addition they have rather distinct longitudinal striation on the mesosomal dorsum which is rather vague in the holotype, notably on the pronotal dorsum. The eyes are fairly convex in the holotype and clearly exceed the outline of the head in full face view, while in most of the recently collected specimens the eyes do not, or only marginally, exceed the lateral cephalic outline.
In Sulawesi there are two inermis-group species:
- Black throughout . . . . . Polyrhachis inermis
- Body black; tibiae light to medium reddish-brown with rest of legs distinctly darker . . . . . Polyrhachis orsylla
Distribution
Distribution based on Regional Taxon Lists
Indo-Australian Region: Borneo, Indonesia (type locality), Malaysia, Philippines, Sulawesi.
Oriental Region: Thailand.
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Biology
Castes
Worker
- Images provided by Harvard University, Museum of Comparative Zoology
- The following images are provided by AntWeb
Nomenclature
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- inermis. Polyrhachis inermis Smith, F. 1858b: 68, pl. 4, figs. 25, 26 (w.) INDONESIA (Sulawesi). Combination in P. (Myrma): Emery, 1925b: 204. Senior synonym of bryanti: Bolton, 1974b: 176.
- bryanti. Polyrhachis (Myrma) bryanti Donisthorpe, 1942e: 707 (w.) BORNEO. Junior synonym of inermis: Bolton, 1974b: 176.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Description
Type Material
Kohout (2008) - Holotype worker. INDONESIA, SULAWESI, The Natural History Museum (examined).
References
- Bolton, B. 1974b [1973]. New synonymy and a new name in the ant genus Polyrhachis F. Smith (Hym., Formicidae). Entomol. Mon. Mag. 109: 172-180 (page 176, Senior synonym of bryanti)
- Emery, C. 1925d. Hymenoptera. Fam. Formicidae. Subfam. Formicinae. Genera Insectorum 183: 1-302 (page 204, Combination in P. (Myrma))
- Kohout, R.J. 2008a. A review of the Polyrhachis ants of Sulawesi with keys and descriptions of new species (Hymenoptera: Formicidae: Formicinae). Memoirs of the Queensland Museum. 52:255-317. PDF
- Smith, F. 1858a. Catalogue of hymenopterous insects in the collection of the British Museum. Part VI. Formicidae. London: British Museum, 216 pp. (page 68, pl. 4, figs. 25, 26 worker described)
