Polyrhachis chalybea

Polyrhachis chalybea
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Formicidae
Subfamily:	Formicinae
Tribe:	Camponotini
Genus:	Polyrhachis
Subgenus:	Myrmhopla
Species:	P. chalybea
Binomial name
Polyrhachis chalybea Smith, F., 1857 Specimen Labels
Synonyms
Polyrhachis sappho Forel, 1911

Identification

Keys including this Species

• Key to Polyrhachis of India

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: 4.966666667° to 0°.

North Temperate	North Subtropical	Tropical	South Subtropical	South Temperate

• Source: AntMaps

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo, Indonesia, Malaysia, Singapore (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.

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.

Castes

Images from AntWeb

Worker. Specimen code casent0281397. Photographer Estella Ortega, uploaded by California Academy of Sciences.	Owned by PSWC, Philip S. Ward Collection.

Holotype of Polyrhachis chalybea. Worker. Specimen code casent0901850. Photographer Ryan Perry, uploaded by California Academy of Sciences.	Owned by OUM, Oxford, UK.

Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

• chalybea. Polyrhachis chalybeus Smith, F. 1857a: 61 (w.) SINGAPORE. Combination in P. (Myrmhopla): Wheeler, W.M. 1919e: 131. Senior synonym of sappho: Dorow, 1995: 55.
• sappho. Polyrhachis sappho Forel, 1911e: 299 (w.) INDONESIA (Sumatra). Combination in P. (Myrmhopla): Emery, 1925b: 194. Junior synonym of chalybea: Dorow, 1995: 55.

The following notes on F. Smith type specimens have been provided by Barry Bolton (details):

Polyrhachis chalybeus

Holotype worker in Oxford University Museum of Natural History. Labelled “MAL-CA,” and with a Donisthorpe type-label. Smith gives the type-locality as “Singapore, Malacca.” Specimens are also present in Oxford University Museum of Natural History from Sarawak (SAR.) and Sumatra (SUM.). One Sumatra specimen has the gaster very finely and densely reticulate-punctate. Normal variation or a separate species?

References

• Dorow, W. H. O. 1995. Revision of the ant genus Polyrhachis Smith, 1857 (Hymenoptera: Formicidae: Formicinae) on subgenus level with keys, checklist of species and bibliography. Cour. Forschungsinst. Senckenb. 185: 1-113 (page 55, Senior synonym of sappho)
• Khachonpisitsak, S., Yamane, S., Sriwichai, P., Jaitrong, W. 2020. An updated checklist of the ants of Thailand (Hymenoptera, Formicidae). ZooKeys 998, 1–182 (doi:10.3897/zookeys.998.54902).
• Smith, F. 1857a. Catalogue of the hymenopterous insects collected at Sarawak, Borneo; Mount Ophir, Malacca; and at Singapore, by A. R. Wallace. [part]. J. Proc. Linn. Soc. Lond. Zool. 2: 42-88 (page 61, worker described)
• Wheeler, W. M. 1919f. The ants of Borneo. Bulletin of the Museum of Comparative Zoology 63: 43-147 (page 131, Combination in P. (Myrmhopla))
• Yamane, S., Tanaka, H.O., Hasimoto, Y., Ohashi, M., Meleng, P., Itioka, T. 2021. A list of ants from Lambir Hills National Park and its vicinity, with their biological information: Part II. Subfamilies Leptanillinae, Proceratiinae, Amblyoponinae, Ponerinae, Dorylinae, Dolichoderinae, Ectatomminae and Formicinae. Contributions from the Biological Laboratory, Kyoto University 31, 87–157.

References based on Global Ant Biodiversity Informatics

• André E. 1892. Voyage de M. Chaper à Bornéo. Catalogue des fourmis et description des espèces nouvelles. Mém. Soc. Zool. Fr. 5: 46-55.
• Chapman, J. W., and Capco, S. R. 1951. Check list of the ants (Hymenoptera: Formicidae) of Asia. Monogr. Inst. Sci. Technol. Manila 1: 1-327
• Chung A.Y.C., and M. Mohamed. 1996. A comparative study of the ant fauna in a primary and secondary forest in Sabah, Malaysia. In Edwards, D.S. Booth, W.E. and S.C. Choy (eds). Tropical Rainforest Research. Kluwer Academic Publishers. Pp 357-366.
• Emery C. 1886. Saggio di un catalogo sistematico dei generi Camponotus, Polyrhachis e affini. Memorie della Reale Accademia delle Scienze dell'Istituto di Bologna 5: 363-382
• Forel A. 1911. Die Ameisen des K. Zoologischen Museums in München. Sitzungsber. Math.-Phys. Kl. K. Bayer. Akad. Wiss. Münch. 11: 249-303.
• Hashimoto Y., Y. Morimoto, and M. Mohamed. 2003. Species List of Ground and Leaf Litter Ants Collected in Lower Kinabatangan. Pp 13-18. In Lower Kinabatangan Scientific Expedition 2002, 176 pp. ISBN-13: 983-2369-11-8
• Kohout R.J., and M. Mohamed. 2008. A preliminary list of the Polyrhachis ants of the Maliau Basin Conservation area in Sabah, Borneo (Hymenoptera: Formicidae: Formicinae). Asian Myrmecology 2: 63-70.
• Mohamed M. 1995. A preliminary list of ants (Hymenoptera: Formicidae) of the Tawau Hills Park, Sabah. In: Ghazally Ismail et al. (eds.), Tawau Hills Park, Sabah, Pelanduk Pub. Pp. 205-213.
• Pfeiffer M.; Mezger, D.; Hosoishi, S.; Bakhtiar, E. Y.; Kohout, R. J. 2011. The Formicidae of Borneo (Insecta: Hymenoptera): a preliminary species list. Asian Myrmecology 4:9-58
• Robson Simon Ant Collection, 05-Sept-2014
• Robson Simon Database Polyrhachis -05 Sept 2014
• Sukimin S., M. Mohamed, and H. Aris. 2010. Ant diversity of Maliau Basin Conservation Area, Sabah, Malaysia. Journal of Tropical Biology and Conservation 6:89-101.
• Wheeler W. M. 1919. The ants of Borneo. Bulletin of the Museum of Comparative Zoology 63:43-147.
• Yamane S.; Nona, A. R. 1994. Ants from Lambir Hills National Park, Sarawak. Pp. 222-226 in: Inoue, T.; Hamid, A. A. (eds.) 1994. Plant reproductive systems and animal seasonal dynamics. Long-term study of dipterocarp forests in Sarawak. Kyoto: Center for Ecological Research, Kyoto University, vii + 255 pp.