133 Works

Nuptial flight of the Southeast Asian plant-ant Crematogaster captiosa (Forel, 1911) and the phenology of colony founding

Brigitte Fiala, Rosli Bin Hashim, Klaus Dumpert & Ulrich Maschwitz
Despite the great importance of nuptial flights for ants, little is known about the swarming processes from the highly diverse tropical regions, especially rainforests. This is particularly true for ants living in obligate symbiosis with myrmecophytic plants. Here we present the first direct observations of the swarming event in the association between Crematogaster captiosa and the pioneer tree Macaranga bancana in Southeast Asia. Nuptial flights of C. captiosa on M. bancana took place during the...

A review of the subgenus Polyrhachis (Campomyrma) Wheeler from Borneo with descriptions of new species (Hymenoptera: Formicidae: Formicinae)

Rudolf J. Kohout
Abstract: Five species of the subgenus Campomyrma Wheeler, 1911 of the genus Polyrhachis Fr. Smith, 1857 are recorded from Borneo, including P. equina Fr. Smith, 1857 and P. gribodoi Emery, 1887 and three species, P. hashimotoi, P. reidi and P. sukarmani, described as new. Polyrhachis equina and P. gribodoi are placed within the newly erected equina species-group. Polyrhachis hashimotoi is placed within the newly erected xiphias species-group together with P. xiphias Fr. Smith, 1863 from...

Observations on the foraging behaviour of Myrmicaria brunnea subcarinata (Smith) (Hymenoptera: Formicidae) in a tropical rainforest in Sarawak (Malaysia)

Jan Wriedt, Dirk Mezger, Lucy Chong & Martin Pfeiffer
As a contribution to the knowledge of the natural history of Myrmicaria brunnea subcarinata (Smith, 1857), we studied the territory, circadian activity patterns, diet composition, trophobiotic interactions and fighting success of a colony of this species in an alluvial forest in Gunung Mulu National Park (Borneo, Malaysia). The territory size of the focal colony, which comprised 6,000 to 8,000 individuals living within a single nest, was approximately 270 m2. Many permanent foraging trails were subterranean...

New synonymy and redescription of Anochetus mixtus Radchenko, 1993, and distinction from the other members of the Anochetus rugosus group (Hymenoptera: Formicidae: Ponerinae)

Rijal Satria, Bui Tuan Viet & Katsuyuki Eguchi
Anochetus yunnanensis Wang, 1993 is recognized as a junior synonym of Anochetus mixtus Radchenko, 1993, and the queen and male of Anochetus mixtus are described for the first time. In addition, male genitalia of A. princeps, A. rugosus and A. mixtus are described. The present study suggests the morphology of the male genitalia and associated sclerites may be useful for discriminating among Anochetus species in which the workers are largely indistinguishable.

Frequency of nest occurrence and nest density of Aneuretus simoni Emery (Sri Lankan Relict Ant) and other ant fauna in an abandoned rubber plantation (Kirikanda Forest) in southwest Sri Lanka

R. K. S. Dias, H.P.G.R.C. Ruchirani, K.R.K.A. Kosgamage & H.A.W.S. Peiris
Aneuretus simoni Emery, a critically endangered ant species endemic to Sri Lanka, was studied in Kirikanda Forest in Kalutara District. The nest occurrence and nest density of ant species was investigated using 240 quadrats (0.5 m x 0.5 m), in six 100 m2 plots, on 15 January, 5 May and 24 July 2010, and recording the number of ground nests belonging to any ant species within each quadrat. Fallen twigs and decaying wood pieces within...

Borneo, fANTastique!

Brian L. Fisher, Benoit Guénard & 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.

Simopone yunnanensis sp. nov. – the first record of Simopone Forel, 1891 from China (Hymenoptera, Formicidae, Cerapachyinae)

Zhilin Chen, Shanyi Zhou & Liwei Liang
The genus Simopone in the subfamily Cerapachyinae is recorded in China for the first time with description of a new species, S. yunnanensis sp. nov.. The new species is closely related to S. oculata Radchenko 1993, but differs distinctly from the latter. An identification key based on worker caste is provided to the grandidieri-group.

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

Alexander G. Radchenko, Yichen Zhang & 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...

New Ant Records for Bangladesh

MD. A. Hannan
Ants of 22 genera and 39 species were collected from 11 districts of Bangladesh. The inclusion of the genus Rhopalomastix sp. is the first record for Bangladesh, and apparently the northernmost record of the genus globally. Six species (Pachycondyla (Brachyponera) luteipes, Leptogenys birmana, Leptogenys diminuta, Meranoplus bicolor, Myrmicaria brunnea and Technomyrmex modiglianii) of ants are confirmed as new records for the country. The total number of identified species of ants in Bangladesh is now 130....

Comparison of foraging habits between four sympatric army ant species of the genus Aenictus in Sarawak, Borneo

Yoshiaki Hashimoto & Seiki Yamane
In Lambir Hills National Park, Sarawak Borneo, we observed foraging habits of four sympatric army ant species of the genus Aenictus: A. laeviceps (F. Smith, 1857), A. dentatus Forel, 1911, A. gracilis Emery, 1893, and A. inflatus Yamane & Hashimoto, 1999. All of these species were demonstrated to be specialized on other ants as a food source. However, notable differences in the composition of prey ants were observed between the four species, which may reduce...

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...

Daily activity patterns of Platythyrea parallela in Peninsular Malaysia

Nurul Ashikin & Rosli Hashim
The study observed the daily activity patterns at natural nests of Platythyrea parallela in the tropical rainforest and was conducted at Ulu Gombak Forest Reserve, Peninsular Malaysia. The 24 hours observation was performed at two stable colonies of this species until a total of 240 hours was collected. From the result obtained,P. parallela was classified as ‘diurnal’ species. Most individuals were observed to be active during midday. Activity patterns were significantly different between day and...

Lasius elevatus, a new ant species of the subgenus Cautolasius (Hymenoptera: Formicidae) from the Indian Himalayas

Himender Bharti & Irfan Gul
A new species of the formicine ant genus Lasius, viz Lasius elevatus sp. nov., is described from the Indian Himalayas. This is the third species of the subgenus Cautolasius known from the Himalayas, with L. alienoflavus Bingham, 1903 and L. talpa Wilson, 1955 reported earlier. A key is provided for the 13 species reported from this region.

Microscopic structure of antennal sensilla in the carpenter ant Camponotus compressus (Fabricius) (Formicidae: Hymenoptera)

Deepak D. Barsagade, Dnyaneshwar B. Tembhare & Seema G. Kadu
The antennae in all castes of the carpenter ant Camponotus compressus were examined using scanning electron microscopy. The antennae are of geniculate type, consisting of a scape and funiculus. The funiculus is subdivided into the pedicel and flagellum. The flagellum consists of a number of segments, ten in females and workers and 11 in males. In all castes the scape is differentiated into a basal ball covered with three types of sensilla and a shaft...

Influence of the arrival of Anoplolepis gracilipes (Hymenoptera: Formicidae) on the composition of an ant community in a clearing in Gunung Mulu National Park, Sarawak, Malaysia

Dirk Mezger & Martin Pfeiffer
The yellow crazy ant Anoplolepis gracilipes is a common and important invasive ant species in all parts of tropical Asia, including Borneo. We studied the impact of this ant species on the chronological development of an ant community in an artificial clearing at the edge of the alluvial forest in the Gunung Mulu National Park in Sarawak, Malaysia, in the years 2006 to 2009. We used 20 pitfall traps each year to monitor the ant...

Discovery of Aneuretus simoni Emery in a disturbed forest in Kalutara, and Stereomyrmex horni Emery in Anuradhapura Sanctuary, Sri Lanka

R. K. S. Dias, H. A. W. S. Peiris & H. P. G. R. C. Ruchirani
This article describes the discovery of Aneuretus simoni and Stereomyrmex horni in two forst areas of Sri Lanka.

Queen polymorphism in Acanthomyrmex careoscrobis Moffett, 1986 in Peninsular Malaysia (Hymenoptera: Formicidae: Myrmicinae), with descriptions of hitherto unknown female castes and males

Aiki Yamada, Fuminori Ito, Rosli Hashim & Katsuyuki Eguchi
The present study presents biological observations on colony characteristics of Acanthomyrmex careoscrobis Moffett, 1986 in Ulu Gombak (Selangor, Malaysia), with redescription of the minor worker and descriptions of the hitherto unknown female castes and males. The colony of A. careoscrobis can produce both alate and ergatoid queens. Ergatoid queens may function as cheap secondary reproductive females, whereas it is at present unclear whether they engage in dependent colony foundation or not. Ergatoid queens have the...

Harvesting fig seeds from bird feces by an Oriental myrmicine ant species, Acanthomyrmex ferox Emery, 1893 (Hymenoptera: Formicidae)

Fuminori Ito, Bruno Gobin & Rosli Hashim
Seed harvesting behavior of the Oriental myrmicine ant, Acanthomyrmex ferox was observed in Ulu Gombak, Peninsular Malaysia. Minor workers harvested fig seeds exclusively from bird feces dropped on the lower vegetation.

Intensive agroforestry practices negatively affect ant (Hymenoptera: Formicidae) diversity and composition in southeast Sulawesi, Indonesia

Wara Asfiya, Lori Lach, Jonathan D. Majer, Brian Heterick & Raphael K. Didham
Many natural forests in southeast Asia have been replaced by agroforestry systems with increasingly intensive management practices. To test the effects of intensive agroforestry practices on the retention of rainforest biodiversity, we quantified ant diversity and composition in three cocoa plantations versus three rainforest remnants in the remote Mekongga Mountains of Southeast Sulawesi, Indonesia. Using three complementary sampling methods (pitfall trapping, leaf litter sifting, and sardine baits) we found substantially more species in the rainforest...

The first observation of honeydew foraging in army ants since 1933: Aenictus hodgsoni Forel, 1901 tending Eutrichosiphum heterotrichum (Raychaudhuri, 1956) in Southeast China

Michael Staab
In the present paper I report the first observation of army ants tending Hemiptera in Asia. On 7 October 2012 at 10:00 local time approximately 30 workers of Aenictus hodgsoni Forel, 1901 were observed and photographed collecting honeydew from around 50 Eutrichosiphum heterotrichum (Raychaudhuri, 1956) (Aphididae) on fresh shoots of a young 1.5 m high Lithocarpus glaber (Thunberg) Nakai, 1916 (Fagaceae) tree.

Sustainable weaver ant (Oecophylla smaragdina​​) farming: harvest yields and effects on worker ant density

Joachim Offenberg & Decha Wiwatwitaya
The Asian weaver ant Oecophylla smaragdina Fabricius is renowned as an efficient biocontrol agent since it preys on a multitude of pest insects. Additionally, this ant is harvested and sold at local and international markets as a delicacy, a prized bird feed and as traditional medicine. We present the first attempt to farm this ant scientifically and test whether the harvest of ant queen brood is compatible with biocontrol, i.e., if worker ant densities are...

Ants as bioindicators of ecosystem health in Shivalik Mountains of Himalayas: assessment of species diversity and invasive species

Himender Bharti, Meenakshi Bharti & Martin Pfeiffer
The Northern-Indian Shivalik mountain range has recently come under strong anthropogenic pressure. Ants were used as bioindicators to assess ecosystem health of the area. We measured diversity, community patterns, species composition and the influence of invasive species of Formicidae by collecting at 75 sites from 44 locations in three habitats: primary forest (PF), secondary forest (SF) and non-forest areas (NF) using six collection techniques. We obtained the most comprehensive dataset compiled for Indian ants to...

Five new species of Dilobocondyla (Hymenoptera: Formicidae) with a revised key to the known species

Himender Bharti & Rakesh Kumar
Five new species of Dilobocondyla are described. Dilobocondyla gasteroreticulatus sp. nov. is reported from India based on worker and female castes. Dilobocondyla eguchii sp. nov. and D. propotriangulatus sp. nov. are reported from Vietnam, D. yamanei sp. nov. from Malaysia and D. gaoyureni from China based on worker caste only. Dilobocondyla fouqueti Santschi is redescribed, with reports of male and female castes. A revised key to the genus is also provided. With the addition of...

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.

Nesting and reproductive biology of Platythyrea sp. (parallela-group) in the Bogor Botanic Gardens, West Java, Indonesia (Hymenoptera: Formicidae)

Fuminori Ito
I report the colony composition and nesting biology of Platythyrea sp. (parallela-group) in the Bogor Botanic Gardens, West Java. This species, which always nests in trees, reproduces through both dealated queens and mated workers. Among 13 collected colonies, dealated queens reproduced in only one colony, which also contained six mated workers, of which three had active ovaries. In the queenless colonies, the percentage of mated workers among the worker population was high, while there were...

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