Cataulacus taprobanae

Bingham (1903:121) encountered Cataulacus taprobanae wandering about 'apparently in an aimless sort of way' on the bark and leaves of trees. Their nests were made in hollow branches. It is also known to nest in Humboldtia laurifolia in Sri Lanka (Krombein et al. 1999) and has been observed foraging diurnally and feeding on extrafloral nectaries of Humboldtia brunonis in India (Gaume et al. 2005).

Identification
A member of the taprobanae group. One of the relatively few species to inhabit the Indian subcontinent, Cataulacus taprobanae is distinguished by its long, divergent propodeal spines, reduced sculpturation dominated by puncturation and the presence of short, erect hairs on the alitrunk.

Distribution
Known from Sri Lanka and India.

Distribution based on Regional Taxon Lists
Oriental Region: India, Sri Lanka. Palaearctic Region: China.

Nomenclature

 *  taprobanae. Cataulacus taprobanae Smith, F. 1853: 225, pl. 20, fig. 10 (w.) SRI LANKA. Forel, 1909e: 393 (q.); Wheeler, G.C. & Wheeler, J. 1954b: 150 (l.); Bolton, 1974a: 83 (m.).

Worker
Bolton (1974) - TL 4.1 – 5.4, HL 1.02 – 1.32, HW 1.26 – 1.50, CI 112 - 123, EL 0.42 – 0.48, OI 32-33, IOD 0.96 – 1.20, SL 0.54 – 0.70, SI 41 - 47, PW 1.02 – 1.32, AL 1.22 – 1.54, MTL 0.64 – 0.82 (10 measured).

Occipital crest complete or broken but always marked out by a series of denticles which decrease in size medially; those nearest the centre often minute. The crest itself shallowly concave across the width of the head. Sides of head behind eyes denticulate, the occipital corners with a small tooth which is, however, larger than the first denticle of the occipital crest. Sides of pronotum marginate, denticulate, but the sides of the mesonotum weakly or not marginate, with only one or two very small denticles. Propodeal spines long, stout and acute, divergent, the outer margins of the spines and the sides of the propodeum with a few minute denticles. First gastral tergite not marginate laterally.

Sculpturation of head and alitrunk primarily of a fine and dense reticulate-puncturation which overlies any rugulation present. The head with a fine loose rugoreticulum or with longitudinal rugae. Pronotum feebly reticulate-rugose, with the rugae tending to become longitudinal and less distinct posteriorly so that on the mesonotum the sculpturation is dominated by the puncturation and only a few feeble longitudinal rugulae are visible. Propodeum sculptured as mesonotum, the declivity usually with a few transverse rugae. First gastral tergite strongly reticulate-punctate with numerous weak longitudinal rugulae.

Dorsal surfaces of head, pedicel, first gastral tergite and appendages with numerous short, stout hairs, also present around the margins of the head and pronotum. Dorsum of litrunk with a few scattered hairs only.

Queen
Bolton (1974) - TL 6.8 – 7.0, HL 1.40 – 1.44, HW 1.48 – 1.58, CI 105 - 109, EL 0.48 – 0.50, OI 32, IOD 1.24 – 1.40, SL ca 0.72, SI ca 45, PW 1.44 – 1.48, AL 1.96 – 1.98, MTL 0.82 – 0.86 (3 measured).

Similar to worker but occipital crest incomplete medially, the median section broadly concave. Denticulation of crest and the sides of the head much reduced. Sides of pronotum with a few small denticles, the sides of the propodeum irregular but not denticulate. Propodeal spines a pair of short, broad, triangular teeth. Sculpturation basically as in worker but with the rugoreticulum of the head and pronotum more pronounced, the scutum and scutellum longitudinally and quite regularly rugose. Distribution of hairs as in worker but those on the head are shorter and less distinct. A transverse row of short hairs is present on the pronotum just anterior to the promesonotal suture.

Male
Bolton (1974) - TL 5.0 – 5.4, HL 1.04 – 1.12, HW 1.18 – 1.26, CI 111 - 117, EL 0.42 – 0.44, OI 34 - 35, IOD 0.98 – 1.04, SL 0.62 – 0.68, SI 49 - 54, PW 1.10 – 1.38, AL 1.72 – 1.82, MTL 0.80 – 0.84 (3 measured).

Occipital crest shallowly concave, usually complete but broken medially in some individuals. The crest denticulate, very feebly so medially, the largest denticles being those closest to the short, triangular occipital tooth. Sides of head behind eyes denticulate. Sides of pronotum irregular but not definitely denticulate. Notauli with only the anterior arms developed, and usually only the distal portions distinct and cross-ribbed; the posterior arm absent. Parapsidal furrows present. Propodeum with a pair of short but acute projecting teeth. Apical portions of parameres smooth and shining. Head and pronotum loosely reticulate-rugose, the rugae of the former raised into minute peaks at many of the points of intersection. Reticular inters paces finely and densely reticulate-punctate. Mesoscutum and scutellum finely longitudinally rugose, the gaster finely and densely reticulate-punctate with some basi gastric costulae present. Hairs numerous on all dorsal surfaces, much more conspicuous than in the other castes.

Type Material
Bolton (1974) - Holotype worker, CEYLON: (G. H. K, Thwaites) (BMNH) [examined].

References based on Global Ant Biodiversity Informatics

 * Bharti H., Y. P. Sharma, M. Bharti, and M. Pfeiffer. 2013. Ant species richness, endemicity and functional groups, along an elevational gradient in the Himalayas. Asian Myrmecology 5: 79-101.
 * Bolton B. 1974. A revision of the Palaeotropical arboreal ant genus Cataulacus F. Smith (Hymenoptera: Formicidae). Bulletin of the British Museum (Natural History). Entomology 30: 1-105.
 * 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
 * Dad J. M., S. A. Akbar, H. Bharti, and A. A. Wachkoo. 2019. Community structure and ant species diversity across select sites ofWestern Ghats, India. Acta Ecologica Sinica 39: 219–228.
 * Dias R. K. S. 2002. Current knowledge on ants of Sri Lanka. ANeT Newsletter 4: 17- 21.
 * Dias R. K. S. 2006. Current taxonomic status of ants (Hymenoptera: Formicidae) in Sri Lanka. The Fauna of Sri Lanka: 43-52. Bambaradeniya, C.N.B. (Editor), 2006. Fauna of Sri Lanka: Status of Taxonomy, Research and Conservation. The World Conservation Union, Colombo, Sri Lanka & Government of Sri Lanka. viii + 308pp.
 * Dias R. K. S., K. R. K. A. Kosgamage, and H. A. W. S. Peiris. 2012. The Taxonomy and Conservation Status of Ants (Order: Hymenoptera, Family: Formicidae) in Sri Lanka. In: The National Red List 2012 of Sri Lanka; Conservation Status of the Fauna and Flora. Weerakoon, D.K. & S. Wijesundara Eds., Ministry of Environment, Colombo, Sri Lanka. p11-19.
 * Dias R. K. S., and K. R. K. Anuradha Kosgamage. 2012. Occurrence and species diversity of ground-dwelling worker ants (Family: Formicidae) in selected lands in the dry zone of Sri Lanka. J. Sci. Univ. Kelaniya 7: 55-72.
 * Dias R. K. S., and R. P. K. C. Rajapaksa. 2016. Geographic records of subfamilies, genera and species of ants (Hymenoptera: Formicidae) in the four climatic zones of Sri Lanka: a review. J. Sci. Univ. Kelaniya 11(2): 23-45.
 * Emery C. 1893. Voyage de M. E. Simon à l'île de Ceylan (janvier-février 1892). Formicides. Annales de la Société Entomologique de France 62: 239-258.
 * Emery C. 1901. Ameisen gesammelt in Ceylon von Dr. W. Horn 1899. Deutsche Entomologische Zeitschrift 1901: 113-122.
 * Forel A. 1903. Les Formicides de l'Empire des Indes et de Ceylan. Part X. J. Bombay Nat. Hist. Soc. 14: 679-715.
 * Forel A. 1909. Études myrmécologiques en 1909. Fourmis de Barbarie et de Ceylan. Nidification des Polyrhachis. Bull. Soc. Vaudoise Sci. Nat. 45: 369-407.
 * Forel A. 1911. Ameisen aus Ceylon, gesammelt von Prof. K. Escherich (einige von Prof. E. Bugnion). Pp. 215-228 in: Escherich, K. Termitenleben auf Ceylon. Jena: Gustav Fischer, xxxii + 262 pp.
 * Forel A. 1913. Wissenschaftliche Ergebnisse einer Forschungsreise nach Ostindien ausgeführt im Auftrage der Kgl. Preuss. Akademie der Wissenschaften zu Berlin von H. v. Buttel-Reepen. II. Ameisen aus Sumatra, Java, Malacca und Ceylon. Gesammelt von Herrn Prof. Dr. v. Buttel-Reepen in den Jahren 1911-1912. Zoologische Jahrbücher. Abteilung für Systematik, Geographie und Biologie der Tiere 36:1-148.
 * Forel, A. 1908. Fourmis de Ceylan et d'Égypte récoltées par le Prof. E. Bugnion. Lasius carniolicus. Fourmis de Kerguelen. Pseudandrie? Strongylognathus testaceus. Bull. Soc. Vaudoise Sci. Nat. 44: 1-22
 * Guénard B., and R. R. Dunn. 2012. A checklist of the ants of China. Zootaxa 3558: 1-77.
 * Kaleeswaran B., S. Ezil, B. P. Ganesh, and S. Bhavatarini. 2008. Biodiversity and niches of Ants in Alagar hills, Tamil nadu Wildlife Biodiversity Conservation Published by Day publishing house pp 188-208.
 * Khot K., G. Quadros, and V. Somani. 2014. Ant Diversity in an urban garden at Mumbai, Maharashtra. National Conference on Biodiversity : Status and Challenges in Conservation - FAVEO 121-125.
 * Mathew R. 2003. On Formicidae (Insecta: Hymenoptera) of Nongkhyllem Wild Life Sanctuary, Ri-Bhoi District, Meghalaya. Records of the Zoological Survey of India 101:195-207.
 * Mathew R., and R. N. Tiwari. 2000. Insecta: Hymenoptera: Formicidae. Pp. 251-409 in: Director; Zoological Survey of India (ed.) 2000. Fauna of of Meghalaya. Part 7. [State Fauna Series 4.] Insecta 2000. Calcutta: Zoological Survey of India, 621 pp.
 * Mohanraj P., M. Ali, and K. Veerakumari. 2010. Formicidae of the Andaman and Nicobar Islands (Indian Ocean: Bay of Bengal). Journal of Insect Science 10: Article 172
 * Mohanraj, P., M. Ali and K. Veenakumari. 2010. Formicidae of the Andaman and Nicobar Islands (Indian Ocean: Bay Of Bengal). Journal of Insect Science 10:172.
 * Mukerjee D. 1930. Report on a collection of ants in the Indian Museum, Calcutta. J. Bombay Nat. Hist. Soc. 34: 149-163.
 * Musthak Ali T. M. 1992. Ant Fauna of Karnataka-2. Newsletter of IUSSI Indian Chapter 6(1-2): 1-9.
 * Narendra A., H. Gibb, and T. M. Ali. 2011. Structure of ant assemblages in Western Ghats, India: role of habitat, disturbance and introduced species. Insect Conservation and diversity 4(2): 132-141.
 * Pajni H. R., and R. K. Suri. 1978. First report on the Formicid fauna (Hymenoptera) of Chandigarh. Res. Bull. (Science) Punjab University 29: 5-12.
 * Rajan P. D., M. Zacharias, and T. M. Mustak Ali. 2006. Insecta: Hymenoptera: Formicidae. Fauna of Biligiri Rangaswamy Temple Wildlife Sanctuary (Karnataka). Conservation Area Series, Zool. Surv. India.i-iv,27: 153-188.
 * Rickson F.R., and M.M. Rickson. 1998. The cashew nut, Anacardium occidentale (Anacardiaceae), and its perennial association with ants: extrafloral nectary location and the potential for ant defense. American Journal of Botany 85(6): 835-849.
 * Varghese T. 2004. Taxonomic studies on ant genera of the Indian Institute of Science campus with notes on their nesting habits. Pp. 485-502 in : Rajmohana, K.; Sudheer, K.; Girish Kumar, P.; Santhosh, S. (eds.) 2004. Perspectives on biosystematics and biodiversity. Prof. T.C. Narendran commemoration volume. Kerala: Systematic Entomology Research Scholars Association, xxii + 666 pp.
 * Zhang Xiang, and Hou You-Ming. 2009. Five new record genus and thirty one new records species of ants (Hymenoptera; Formicidae) in Fujian Province. Journal of Fujian Agriculture and Forestry University 38(5): 479-484.