148 Works

Queen and male longevity in the Southeast Asian ant Cardiocondyla tjibodana Karavaiev, 1935

Marion Fuessl, J├╝rgen Heinze & Alexandra Schrempf
Many species of the ant genus Cardiocondyla are characterized by a bizarre polyphenism with winged disperser males and wingless males that engage in lethal fighting for access to nestmate queens. In C. obscurior, winged males have a stronger life-prolonging and fecundity-enhancing effect for their female mates than wingless males. Here we examine whether the same is true for males of the southeast Asian C. tjibodana. Male phene did not have an effect on queen life...

Preliminary observations on gravid queen protection in Oecophylla smaragdina: Evacuation and retinue function

Joost Van Itterbeeck, , & Arnold Van Huis
This study reports on behaviour of Oecophylla smaragdina worker ants to protect their queens during nest evacuation from injuries and predation.

Aggression of Solenopsis invicta towards other ants is not affected by colony rafting

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Solenopsis invicta is an ivasive ant species originally inhabiting flood plains in South America and therefore well adadapted to flooding events. During floodings, there ants prequently perform rafting behaviour. This works studies the impact of rafting behaviour on interspecific agrression bahaviour.

Geographic distribution of the weaver ant Oecophylla smaragdina

James K. Wetterer
Weaver ants (Oecophylla spp.) are conspicuous arboreal ants, which build distinctive nests in trees. In many regions, people use weaver ants for food, medicine, and/or as biological control agents. There are two recognized species of weaver ants: Oecophylla longinoda (Latreille, 1802) in Africa and Oecophylla smaragdina (Fabricius, 1775) in Asia, Australia, and the Western Pacific. Here, I mapped the geographic distribution of O. smaragdina based on >2700 site records from 21 countries: Australia, Bangladesh, Bhutan,...

Synchronized group retrieval of honeydew by Prenolepis ants in Singapore

Christian Peeters & Gordon Yong
Prenolepis of the Formicinae sybfamily are smallish ants that mostly inhabit soil, leaf litter, and rotten wood on the ground and appear to be generalist omnivores and often gather hemipteran exudates. This work reports on synchronized group retrieval of honeydew by Prenolepis subopaca ants in Singapore.

Lost in the city: discovery of the rare ant genus Leptanilla (Hymenoptera: Formicidae) in Macau with description of Leptanilla macauensis sp. nov.

, Seiki Yamane &
The rare ant genus Leptanilla was discovered in Macau SAR, China for the first time, which represents the second record for this genus in southeastern China. Through the detailed examination, the new species Leptanilla macauensis sp. nov. described here has unique character conditions particularly in the structure of the clypeus and subpetiolar process. Moreover, the discovery of L. macauensis sp. nov. within an island of vegetation surrounded by a dense urbanized matrix illustrates future possibilities...

Morphology and ultrastructure of the venom gland in the ant Brachyponera sennaarensis

Johan Billen & Mohammed Al-Khalifa
We studied the morphology and ultrastructure of the venom gland of queens and workers of the samsum ant Brachyponera sennaarensis, which is known for its very painful sting. The general anatomical features of the gland are similar to those of other ants. The secretory cells do not have a granular endoplasmic reticulum, but contain numerous scattered free ribosomes and a well-developed Golgi apparatus. The convoluted gland represents an additional secretory tissue, in which the venom...

Additions to the ant fauna (Hymenoptera: Formicidae) of Oman: an updated list, new records and a description of two new species

Mostafa R. Sharaf, Brian L. Fisher, , Andrew Polaszek &
An updated list of ant species (Formicidae) known from Oman is provided, including both published records and recently collected material, and bringing the total number to 123 species belonging to 24 genera and four subfamilies. In the present study thirty-four ant species were collected from Oman during expeditions in 2016 and 2017. Ten ant species are recorded for the first time in Oman : Cardiocondyla breviscapa Seifert, 2003, C. mauritanica Forel, 1890, C. yemeni Collingwood...

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

Aiki Yamada, , & 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...

Review of ants from the genus Polyrhachis Smith (Hymenoptera: Formicidae: Formicinae) in Hong Kong and Macau, with notes on their natural history

Polyrhachis is one of the most taxonomically and ecologically diverse ant genera in the world. Limited knowledge is, however, available on the species encountered within continental South East Asia, contrasting with the extensive studies conducted on African and Indo-Australian species. Here a contribution of Polyrhachis species from Hong Kong and Macau based on specimens collected in the past 30 years, with addition of material from other southeast Chinese provinces is provided. Additionally, new nest collections...

Behavior of the queen of Leptanilla clypeata Yamane et Ito collected in the Bogor Botanical Gardens, West Java, Indonesia (Hymenoptera; Formicidae), with a note on colony composition and a description of the ergatoid queen

One colony of Leptanilla clypeata Yamane et Ito was collected in the type locality, the Bogor Botanical Gardens, West Java, Indonesia. The colony was composed of one ergatoid queen, 100 workers, and 120 almost uniformly sized larvae. Queen behavior was observed in the laboratory. As shown in L. japonica by Masuko (1989), the queen showed larval hemolymph feeding, and started to lay eggs after frequent feeding of larval and prepupal hemolymph. The morphology of the...

Thelytokous parthenogenesis by dealate queens in the myrmicine ant Monomorium hiten distributed in Nansei Islands, western Japan, with description of the male

, Shogo Makita, Hirotaka Nakao, Ryota Hosokawa, Tomonori Kikuchi & Seiki Yamane
Thelytokous reproduction by dealate queens in Monomorium hiten Terayama, 1996, collected from four islands of the Nansei Islands (Okinawa Prefecture, Japan) was confirmed in the field and laboratory. Dissection revealed that all dealate queens (N = 38) found in nine field collected colonies were uninseminated. Orphan colonies reared in the laboratory produced alate queens and they laid eggs from which workers or alate queens emerged. Alate queens reared in isolation produced nanitic workers without food...

Obituary - Bakhtiar Effendi Bin Yahya

Seiki Yamane &
Obituary of Bakhtiar Effendi Bin Yahya.

Remote detection and distinction of ants using nest-site specific LISS-derived Normalised Difference Vegetation Index

Ajay Narendra &
This study in Western Ghats, India, investigates the relation between nesting sites of ants and a single remotely sensed variable: the Normalised Difference Vegetation Index (NDVI). We carried out sampling in 60 plots each measuring 30 x 30 m and recorded nest sites of 13 ant species. We found that NDVI values at the nesting sites varied considerably between individual species and also between the six functional groups the ants belong to. The functional groups...

New Ant Records for Bangladesh

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....

Ant diversity in a Peninsular Malaysian mangrove forest and oil palm plantation

, Wan Faridah Akmal Wan Jusoh &
In Malaysia, it is a common practice to convert mangrove forests into agricultural plantations, especially oil palm. For this to happen, mangroves are drained and pesticides and fertilizers are often used to encourage healthy growth and yield of the oil palms, impacting biodiversity there and nearby. Mangroves are challenging habitats and certain mangrove ants, such as the Australian species Camponotus anderseni, show a high degree of adaptation to them.

Global generic richness and distribution: new maps of the world of ants with examples of their use in the context of Asia

, Michael D. Weiser & Robert R. Dunn
Knowledge of the biogeographic distribution of ants is central to our understanding of ant ecology, evolution, taxonomy and conservation. Here, we introduce a novel global biogeographic database for ant genera and an associated website with maps showing the known distribution of all extant ant genera. We use this database to consider knowledge of the distribution of ant genera in Asia, a hotspot of ant diversity and biological diversity more generally. We find that, although ant...

New records of ants (Hymenoptera: Formicidae) from Iran

Omid Paknia, Alexander Radchenko & Martin Pfeiffer
The ant species list of Iran is far from complete. So far, only 110 species belonging to 26 genera have been recorded from Iran. For this study, we collected the majority of ant material in two periods of field work in spring and summer of 2007 and 2008. In total, we checked more than 35,000 specimens, and recorded 32 species and six genera new to Iran: Dolichoderus, Myrmecina, Proformica, Pyramica, Stenamma and Strongylognathus. Our new...

Arboreal ant fauna of Joyama Park, Kagoshima Prefecture, southern Japan

Yutaka Harada
Five tree species (Prunus x yedoensis, Prunus jamasakura, Prunus lannesiana, Quercus acutissima and Acer palmatum) and the associated ant fauna were surveyed in Joyama Park, Hioki City, Kagoshima Prefecture, southern Kyushu, Japan. Ants were found on 206 (92%) of 224 trees surveyed. Fifteen ant species were collected from trees; the three most frequent ant species were Pristomyrmex punctatus (on 92 trees), Crematogaster matsumurai (65 trees) and Formica hayashi (49 trees). The number of ant species...

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

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This article describes the discovery of Aneuretus simoni and Stereomyrmex horni in two forst areas of Sri Lanka.

Provisioning services from ants: food and pharmaceuticals

The present review assesses the role of ants in providing ecosystem provisioning services in the form of products such as food and medicine. Many species of ants constitute an inexpensive, protein- and mineral-rich, unconventional human food source. Some ant species are also utilised in traditional entomotherapy by indigenous people, or as a complementary and/or alternative medicine, in many parts of the world. Recent biochemical and pharmacological investigations are increasingly providing evidence regarding the medicinal significance...

Two new species of the ant genus Leptogenys (Hymenoptera: Formicidae) from India, with description of a plesiomorphic ergatogyne

Two new species of Leptogenys based on the worker caste are described under the names Leptogenys lattkei sp. nov. and Leptogenys transitionis sp. nov. The ergatogyne of Leptogenys transitionis also reported here is the first of its kind in Leptogenys, characterised by a highly enlarged gaster, three prominent ocelli and the absence of wing sclerites. The ergatogyne of L. transitionis is intermediate between that of L. ergatogyna, with well-developed wing-base sclerites and ocelli, and the...

A review of the Polyrhachis xiphias species-group of the subgenus Campomyrma Wheeler (Hymenoptera: Formicidae: Formicinae)

Rudolf J. Kohout
The Polyrhachis xiphias species-group of the subgenus Campomyrma Wheeler is reviewed. Descriptions of the previously-undescribed worker of P. xiphias and queen of P. shixingensis are given. A key to workers of the group is provided. Workers of all species and queens of P. shixingensis and P. xiphias are illustrated.

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

& 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...

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