158 Works

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,...

Redescription of Monomorium pallidum Donisthorpe, 1918, revised status

Lech Borowiec, Mohammad Saeed Mossadegh, Sebastian Salata, Shima Mohammad, Ebrahim Tamoli Torfi, Mehdi Toosi & Ali Almasi
Monomorium pallidum Donisthorpe, 1918 is redescribed based on material from Iran (new country record). It is removed from the genus Trichomyrmex Mayr, 1865, its species status is retrieved and placed in the M. monomorium group of the genus Monomorium Mayr, 1855.

Colony composition, arthropod egg predation, and antennal structure of the ant Discothyrea sauteri (Hymenoptera: Formicidae)

Keiichi Masuko
In an evergreen, broadleaf forest in central Japan, we collected 21 colonies of the cryptic ant, Discothyrea sauteri, which nests in small cavities in the soil (ca. 100 mm depth), rotting logs, and dead branches lying on the forest floor. The largest colony contained 132 workers, and one third of the collected queenright colonies were functionally polygynous, as revealed by dissection of the queens. Ant nests collected between April and November contained many globular, arthropod...

The twists and turns of biological research: first record of an ergatoid queen in the ant genus Pheidole Westwood, 1839, and implications for dispersal and life history

David Emmanuel M. General, Perry Archival C. Buenavente & Christian Peeters
An ergatoid queen is reported for the first time in the ant genus Pheidole Westwood, 1839. Initially being investigated as a mermithergate, its true reproductive nature was finally proven after several years of searching for fresh specimens for dissection and imaging. Two possibilities remain unresolved regarding the reproductive strategy seen in the Philippine local populations of P. aglae: (1) that they are secondary reproductives; or (2) winged queens have been eliminated from the Philippine population...

Colony composition in the Oriental ectatommine ant, Gnamptogenys menadensis in Peninsular Malaysia

, & Bruno Gobin
Reproductive organization and mode of propagation in social insects can vary under different environmental conditions. To test this hypothesis, colony composition of Gnamptogenys menadensis was investigated in 38 colonies from Ulu Gombak, a tropical rain forest zone in Peninsular Malaysia, and compared to earlier data from Karaenta, a tropical monsoon zone in Sulawesi. As in Karaenta, both dealate queens and gamergates (mated egg laying workers) reproduced in Ulu Gombak. Coexistence of dealate queens and gamergates...

The biology and physiological adaptation of mangrove ants to tidal flooding

Mogens Gissel Nielsen
Mangroves are an extreme biotope where ants are often described as the most abundant and influential group of insects. Yet very few studies have examined how ants survive the often extreme flooding of this biotope. This review summaries knowledge of the distribution and biology of mangrove ants, giving a particular insight into their adaptations, behavioral and physiological, and describes how some ant species survive during the extreme conditions with high temperatures, tidal flooding, very low...

Ecological notes on a plant ant, Cladomyrma scopulosa Eguchi & Bui (Hymenoptera, Formicidae, Formicinae) associating with a tree species Saraca dives Pierre (Leguminosae)

Katsuyuki Eguchi & Tuan Viet Bui
Abstract: In north and north-central Vietnam colony structure and other aspects of biology of Cladomyrma scopulosa Eguchi & Bui associating with a tree species Saraca dives Pierre were recorded. Within the genus Cladomyrma a colony structure with multiple dealate queens has been seen almost exclusively in C. scopulosa. Our limited observations suggest that secondary polygyny at the early founding stage, or even primary polygyny, often occur in C. scopulosa. The colony may become progressively more...

A new species of the Polyrhachis (Myrmhopla) flavoflagellata-group (Hymenoptera: Formicidae: Formicinae) from Borneo

Rudolf J. Kohout
Polyrhachis muara, a new species from Borneo in the flavoflagellata species-group of the subgenus Myrmhopla, is described. A key to the workers of the group is provided and all four species are illustrated.

Do tenants always pay their rent? The Asian ant-plant Pometia pinnata (Sapindaceae) and its leaf domatia provide free access to generalist ants

Joachim Moog, Katja Atzinger, & Ulrich Maschwitz
The tree Pometia pinnata Forst. forma glabra (Bl.) Jacobs is an ant-plant that provides lodging (leaf domatia) and food (extrafloral nectar, excretions of coccids) for ants. The leaf domatia are formed by two pairs of strongly modified basal leaflets. In total, 63 ant species from 18 genera and 4 subfamilies were encountered in the domatia of the host in the study area (Ulu Gombak, Malaysia). We found that the ant⁄Pometia relationship has two stages: (i)...

Nest construction in the arboreal ant Polyrhachis tubifex Karavaiev, 1926

Simon K.A. Robson & Rudolf J. Kohout
In this study we use scanning electron microscopy to examine in more detail the nesting material of Polyrhachis tubifex.

Record of a mixed colony of two dacetine species: Strumigenys rotogenys and Pyramica mitis (Myrmicinae) from Gunung Mulu National Park, Sarawak, Malaysia

Dirk Mezger & Martin Pfeiffer
Here we report on a new association between Strumigenys and Pyramica from Bornean alluvial forest.

The importance of weaver ant (Oecophylla smaragdina Fabricius) harvest to a local community in Northeastern Thailand

, , Santi Suksard & Joachim Offenberg
Ants of the species Oecophylla smaragdina are a valued resource in some Southeast Asian countries since they are edible. In Thailand they are an expensive delicacy collected in high numbers from natural habitats. In this study we interviewed 25 ant collectors in Nakhon Ratchasima Province to elucidate the extent of ant collection and its socioeconomic impact. On average more than 3 persons per village collected the ants, each collecting on average 219 (± 107.5) kg...

Gamergate reproduction without queens in the ponerine ant Pachycondyla (=Bothroponera) tesseronoda (Emery, 1877) in southern India (Hymenoptera: Formicidae)

The colony composition of the ponerine ant Pachycondyla (=Bothroponera) tesseronoda was studied in Mudigere, southern India. The colonies (n = 9) each consisted of 102 (+ SD 28) workers on average, without morphologically distinctive queens. Instead, one to eight gamergates (inseminated and egg-laying workers) per colony reproduced. Virgin workers developed oocytes, but most of these seem to have degenerated before maturation. Experimental removal of gamergates resulted in oviposition by virgin workers, suggesting that the presence...

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

Joachim Offenberg &
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 dominant insect visitors of the extrafloral nectaries of sponge gourd plant, Luffa cylindrica (L.) (Cucurbitaceae)

Vivek Mohan Agarwal &
The button-shaped extrafloral nectaries (EFNs) located on the bracts, bracteoles, calyces and leaves of cultivated sponge gourd plant, Luffa cylindrica, were visited by insects belonging to five different orders: Hemiptera, Diptera, Coleoptera, Hymenoptera, and Lepidoptera. Insects with biological-control potential recorded at the EFNs included ants, wasps and ladybird beetles. Ants, comprising ten species, constituted by far the most abundant group (84.44 ± 4.34 % of individuals) at the EFNs. Insect pollinators included honey bees, butterflies...

The Formicidae of Borneo (Insecta: Hymenoptera): a preliminary species list

Martin Pfeiffer, Dirk Mezger, Shingo Hosoishi, & Rudolf J. Kohout
More than ninety years after Wheeler’s 1919 “Ants of Borneo,” we present a comprehensive list of the Bornean ant fauna, recorded in the states of Brunei, Sabah and Sarawak (Malaysia), and Kalimantan (Indonesia). Our critical review of ant literature resulted in a catalogue of 97 ant genera with 717 valid species and 52 additional subspecies of ants from 12 subfamilies, including eight genera for which, up to now, only morphospecies have been recorded in Borneo....

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

Deepak D. Barsagade, & 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...

This article reports the result of observations on the dietary behavior of D. kamiteta in the laboratory, suggesting that this species is a specialised predator of spider eggs.

Motoki Katayama
This article reports the result of observations on the dietary behavior of D. kamiteta in the laboratory, suggesting that this species is a specialised predator of spider eggs.

The composition of ant species on banana plants with Banana Bunchy-top Virus (BBTV) symptoms in West Sumatra, Indonesia

Henny Herwina, , Jum Junidang &
A brief study on ant species on banana plants with Banana Bunchy-top Virus (BBTV) symptoms was conducted by direct collection in four regencies and one city of West Sumatra Province in Indonesia. During the sampling we found 39 banana plants with BBTV symptoms, of which 36 were occupied by insects, and of these 35 plants contained ants. A total of 24 species of ants, belonging to 16 genera, were collected. Myrmicinae was the subfamily with...

Studies on the predatory activities of Oecophylla smaragdina (Hymenoptera: Formicidae) on Pteroma pendula (Lepidoptera: Psychidae) in oil palm plantations in Teluk Intan, Perak (Malaysia)

A field study was conducted to elucidate the predatory activities of the ant Oecophylla smaragdina on the bagworm Pteroma pendula in oil palm plantations at Teluk Intan, Perak, Peninsular Malaysia, from November 2010 to August 2011. The ant was found to be prevalent in taller (> 4m) palm stands but absent in shorter ones subject to a comparable regime of chemical pesticides or biological control. Among the taller palms the number of nests per tree...

Book review: Ant Ecology

Omid Paknia
Ant Ecology came at an ideal time for synthesising and summarising what myrmecologists have learned in the last 20 years, and pointing which directions myrmecologists should move in the coming years.

Habitat preferences of Strumigenys ants in western Japan (Hymenoptera: Formicidae)

, Kazunori Yamamoto, Yoshifumi Touyama &
Six Japanese species of Strumigenys ants inhabiting urban parks and various forests were studied concerning their habitat preferences.

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

, &
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.

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