148 Works

A review of the nesting habits and socioecology of the ant genus Polyrhachis Fr. Smith

Simon K.A. Robson & Rudolf J. Kohout
We provide a summary of the nesting and socioecological habits of 197 species of Polyrhachis ants. Nesting habits range from subterranean to terrestrial, lignicolous, lithocolous and arboreal with varying levels of consistency at the subgeneric level. Species are predominantly either subterranean or terrestrial nesting within the subgenera Campomyrma, Chariomyrma and Hagiomyrma; mainly arboreal nesting within Aulacomyrma, Cyrtomyrma, Hedomyrma, Hemioptica, Myrmatopa and Myrmothrinax; lignicolous within Hedomyrma, and variable within Myrma, Myrmhopla and Polyrhachis. The majority of...

Trophobiosis in a tropical rainforest on Borneo: Giant ants Camponotus gigas (Hymenoptera: Formicidae) herd wax cicadas Bythopsyrna circulata (Auchenorrhyncha: Flatidae)

Martin Pfeiffer & Karl Eduard Linsenmair
Here we report on a trophobiotic association of the predominantly nocturnal giant forest ant Camponotus gigas (Latreille, 1802) with a species of Flatidae, Bythopsyrna circulata (Guerin-Méneville, 1844) observed in Kinabalu National Park, Sabah, Malaysia. We investigate task sharing of the ants and quantify their nutritional benefits. Bythopsyrna circulata, which had no morphological adaptation to trophobiotic interaction with ants and seems to be facultatively associated with ants, produced the largest quantities of honeydew reported up to...

On a collection of Formicidae (Hymenoptera:Vespoidea) from Buxa Tiger Reserve, West Bengal, India, with new records of one rare genus and a rare species

& Saroj Sheela
One day’s collection of Formicidae from the Buxa Tiger Reserve of West Bengal, India yielded a total of 19 species from 15 genera and five subfamilies, of which six species are reported for the first time in the state of West Bengal (Philidris sp., Odontoponera transversa (Smith), Tapinoma indicum Forel, Crematogaster ransonneti Mayr, Lophomyrmex kali Rigato and Monomorium scabriceps (Mayr)). The genus Philidris is recorded here for the first time from mainland India. Lophomyrmex kali...

Species composition and nesting habits of ants in a hill-country home garden in Sri Lanka

This study attempts to identify the ants nesting in a home garden in the hill-country of Sri Lanka and to describe their nest morphology with a view to using the same for their identification. A total of 21 ant species were recorded from the home garden by a combination of methods, and of these, eight also occurred indoors. A total of 1,363 nests belonging to 18 species inhabiting the home garden were encountered, and their...

A new ant species from Borneo closely resembling Tetramorium flagellatum Bolton, 1977 (Hymenoptera: Formicidae)

Daniela Magdalena Sorger
Tetramorium lucyae sp. nov. from Gunung Murud (Kelabit Highlands), Sarawak, Borneo is described and recognized as a member of the Tetramorium ciliatum-species group. The species closely resembles Tetramorium flagellatum Bolton, 1977. A discussion of the discrimination of the two species is presented.

Cryptopone subterranea sp. nov., a rare new cryptobiotic ant species (Hymenoptera: Formicidae) from India

&
A cryptobiotic species Cryptopone subterranea sp. nov. is described based on the worker caste, collected in the foothills of the Indian Himalayas. It most resembles C. motschulskyi Donisthorpe, 1943, and distinctly differs from all described species of the genus. An identification key to the known Indian species of Cryptopone is provided.

A further new blue Polyrhachis ant (Hymenoptera: Formicidae) from the Philippines

Herbert Zettel
Polyrhachis (Myrma) viola sp. nov. from Mangkagangi Island and a near locality on Mindanao Island, both in Surigao del Sur Province, the Philippines, is described and illustrated. It is the fourth-named species in the P. cyaniventris species group which comprises striking blue-coloured ants that are endemic to the Philippines. In addition, Polyrhachis (Myrma) cyaniventris F. Smith, 1858 is reported from Cebu Island, and thus the biogeographical subregion of Greater Negros-Panay, for the first time.

The current status of research on Solenopsis invicta Buren (Hymenoptera: Formicidae) in Mainland China

Wang Lei, Lu Yongyue, Xu Yijuan & Zeng Ling
Since the Red Imported Fire Ant Solenopsis invicta was found in late 2004 in Mainland China, researchers have paid much attention to this new invasive species. Here we summarise a series of studies on this serious invasive pest, including research on reproductive biology and ecology, ecosystem impacts, quarantine techniques, potential distribution and risk of spread, besides monitoring and management techniques. To date, S. invicta has been found in five provinces in South China and has...

Two new species of the proceratiine ant genus Discothyrea Roger from Yunnan, China, with a key to the known Oriental species

, Chris J. Burwell & Akihiro Nakamura
Two new species of the proceratiine ant genus Discothyrea Roger, 1863 collected from Yunnan Province in southwestern China are described: D. banna sp. nov. and D. diana sp. nov. A key, based on the worker caste, to the nine known Oriental species of the genus is provided.

Tetraponera periyarensis, a new pseudomyrmecine ant species (Hymenoptera: Formicidae) from India

& Shahid Ali Akbar
Tetraponera periyarensis sp. nov. is described based on a single worker collected from Manalar, part of Periyar Tiger Reserve, Kerala, India. This is the fourth species of the rufonigra-group of Tetraponera known from the Indo-Australian region, with T. concava Xu & Chai, 2004, T. pilosa Smith, 1858 and T. rufonigra Jerdon, 1851 reported earlier. An identification key to the worker caste of Indian species is provided.

Species grouping and key to known species of the ant genus Echinopla Smith (Hymenoptera: Formicidae) with reports of Chinese species

&
Twenty-three valid species of the formicine ant genus Echinopla Smith are recorded in the world. Body surface sculptures of the genus are summarized into four types: shagreened, longitudinally striate, bluntly spined with background retirugose and cribrate with interstice retirugose. The twenty-three species are divided into five species-groups based on the body surface sculpture types and other important characters. A key to known species of the genus is provided based on worker and queen castes. E....

Taxonomic studies on ant genus Hypoponera (Hymenoptera: Formicidae: Ponerinae) from India

Himender Bharti, Shahid Ali Akbar, & Joginder Singh
The Indian species of the ant genus Hypoponera Santschi, 1938 are treated herewith. Eight species are recognized of which three are described as new and two infraspecific taxa are raised to species level. The eight Indian species are: H. aitkenii (Forel, 1900) stat. nov., H. assmuthi (Forel, 1905), H. confinis (Roger, 1860), H. kashmirensis sp. nov., H. shattucki sp. nov., H. ragusai (Emery, 1894), H. schmidti sp. nov. and H. wroughtonii (Forel, 1900) stat. nov....

Geographic spread of Vollenhovia emeryi (Hymenoptera: Formicidae)

James K. Wetterer, & Douglas B. Booher
Vollenhovia emeryi Wheeler is a small and inconspicuous ant species originally from East Asia that recently has been found in North America. Here, we examine the geographic spread of V. emeryi and compare its native range in Asia with its exotic range in North America. We compiled published and unpublished V. emeryi specimen records from >300 sites. We documented the earliest known V. emeryi records for 14 geographic areas, ten in Asia (Japan, North Korea,...

New records of ant species (Hymenoptera: Formicidae) to the fauna of Iran: Camponotus alii Forel, 1890 and Proformica korbi (Emery, 1909)

Fatemeh Khandehroo, , Hussein Sadeghi Namghi & Lida Fekrat
Two ant species, Camponotus alii Forel, 1890 and Proformica korbi (Emery, 1909,) are recorded as new for the ant fauna of Iran, summing up the number of ant species up to 185 recorded species.

Comparing different methods to assess weaver ant abundance in plantation trees

Rosine Wargui, Joachim Offenberg, Antonio Sinzogan, Appolinaire Adandonon, &
Weaver ants (Oecophylla spp.) are widely used as effective biological control agents. In order to optimize their use, ant abundance needs to be tracked. As several methods have been used to estimate ant abundance on plantation trees, abundances are not comparable between studies and no guideline is available on which method to apply in a particular study. This study compared four existing methods: three methods based on the number of ant trails on the main...

Borneo, fANTastique!

Brian L. Fisher, & Simon Robson
Report on the ant course in Borneo, held between July 20th to July 31th in Maliau Basin, Sabah, Malaysia. A list of 88 recorded genera is presented.

New data on the distribution and ecology of Myrmica ravasinii Finzi, 1923 (Hymenoptera, Formicidae)

Alexander Radchenko, & Yury Komarov
Myrmica ravasinii Finzi, 1923 was formerly recorded from Balkans, Greece, Turkey, and Transcaucasia. We report the first records of this species from the North Caucasus (North Ossetia-Alania and South Ossetia). The taxonomic position, morphological characteristic, modern distribution and ecology of M. ravasinii are discussed.

Morphology and ultrastructure of Pavan’s gland of Aneuretus simoni (Formicidae, Aneuretinae)

Johan Billen & Sebastiaan Verbesselt
Workers of Aneuretus simoni have a well-developed Pavan’s gland, which is the exocrine character that makes the Aneuretinae and Dolichoderinae sister groups. The secretory epithelium of the gland consists in both minor and major workers of an anterior and a posterior part, which makes them different from the Dolichoderinae where the gland is formed by a single part only. At the ultrastructural level, the secretory cells are characterized by a very prominent smooth endoplasmic reticulum,...

Effect of pleometrosis and brood transplantation on colony growth of the black garden ant, Lasius niger

Natalia E. L. Madsen & Joachim Offenberg
In response to intra- and interspecific competition, ant colonies have evolved mechanisms to maximize early colony growth. Through the analysis of photographic images, this study describes the individual effect of two different strategies, pleometrosis and pupae transplantation, on the growth of Lasius niger colonies. Results showed that both methods had an overall positive effect on colony production, albeit the magnitude at which pupae transplantation boosted colony growth was much larger than pleometrosis. After six weeks,...

Colony composition and behavioral characteristics of Myrmoteras iriodum and M. jaitrongi in Ulu Gombak, Peninsular Malaysia (Hymenoptera: Formicidae)

, Satoshi Miyazaki, & Johan Billen
The colony composition and behavioral characteristics of the trap-jaw ants Myrmoteras iriodum and M. jaitrongi were studied in Ulu Gombak, Peninsular Malaysia. The following colony characteristics were common in both species: (1) Colony size was remarkably small, less than 10 workers on average with one mated dealate queen. Alate sexuals were produced in colonies with less than 10 workers. (2) Queens had a total of four ovarioles per individual (2+2) while workers had two (1+1)....

The exocrine system of Aneuretus simoni (Formicidae, Aneuretinae)

Johan Billen
This paper reviews the morphology of the 11 exocrine glands that we found in Aneuretus simoni workers. In comparison with their stingless sister group Dolichoderinae, the stinging A. simoni has a well-developed venom gland with long and slender secretory filaments. They also share the occurrence of Pavan’s gland as source of the trail pheromone, although this gland has a bilobed appearance in Aneuretus, while it only has one lobe in dolichoderine species. The intramandibular gland...

Striking polymorphism among infertile helpers in the arboreal ant Gesomyrmex

Christian Peeters, , , Roberto A. Keller, & Mathieu Molet
Gesomyrmex (subfamily Formicinae) is a poorly known arboreal ant from the Oriental tropics. We sampled colonies in three localities (NE Thailand, peninsular Malaysia, and Sabah) and examined inhabitants of ten nests inside living branches. None of the nests had a reproductive dealate queen, indicating colonies are polydomous. We distinguished three sterile castes using discrete morphological traits, morphometry and total body size. Observations of behaviour are challenging in tree canopies, and we use functional morphology to...

A new species of the ant genus Strongylognathus (Hymenoptera, Formicidae) from Inner Mongolia, with notes on the species reported from China

Alexander G. Radchenko, & Jürgen Heinze
A new species, Strongylognathus dao sp. n. is described based on all three castes from Inner Mongolia, China. It belongs to the S. huberi species-group and differs from the related species S. koreanus Pisarski by the presence of standing hairs on the temples and genae, by the distinctly darker color of the body, and also by the relatively shorter, higher and wider postpetiole. Its workers differ from S. christophi Emery by the longer head and...

Colony composition and nesting habits of six species of Aphaenogaster in Thailand (Hymenoptera; Formicidae)

, , &
Aphaenogaster ants are known as predators and seed dispersers in temperate forests. The biological information of tropical Aphaenogaster, however, is still limited. We investigated the nesting habits and colony composition of six Aphaenogaster species in Thailand. All six species inhabiting several types of tropical forest nested in the soil of slopes nearby a forest path. In addition, sp. 3 nested under a stone and sp. 4 nests were found under leaf litter and in the...

Forest gaps, edge, and interior support different ant communities in a tropical peat-swamp forest in Borneo

Stijn J. J. Schreven, Eric D. Perlett, Benjamin J. M. Jarrett, Nicholas C. Marchant, , Ari Purwanto, & Mark E. Harrison
Southeast Asia’s tropical peat-swamp forests (TPSF) are globally important for carbon storage and biodiversity conservation, but are at risk from multiple threats and urgently require improved management. Ants are often used as ecological indicators in monitoring programmes to guide adaptive management, but data on TPSF ants are scarce. We conducted a twelve-month study on ants in the Sabangau TPSF in Indonesian Borneo using baited traps, to compare community composition across three disturbance categories (forest gaps,...

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