17 Works

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

, & 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.

The northern-most record of Leptanillinae in China with description of Protanilla beijingensis sp. nov. (Hymenoptera: Formicidae)

Pei Man, Hao Ran, &
Protanilla beijingensis sp. nov. from Beijing, China, is described. The distribution of the new Protanilla species is further north than that of any other species in the genus. This also represents the first record of a Leptanillinae species from Palaearctic China. By means of a subterranean pitfall trap (between 30 and 55 cm below ground), we made a collection of three workers and one queen of P. beijingensis sp. nov. and 106 individuals of Leptanilla...

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...

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.

Notes on the habitat and biology of the rare ant genus Tyrannomyrmex (Fernández, 2003)

Mark K. L. Wong & Gordon W. J. Yong
The rare myrmicine ant genus Tyrannomyrmex Fernández, 2003 comprises three species of tropical ants restricted to the Oriental region. This study presents information on worker size, specific habitat, food and behaviour of Tyrannomyrmex rex.

The metapleural gland of Aneuretus simoni (Formicidae, Aneuretinae)

Johan Billen
Aneuretus simoni workers have a paired metapleural gland that in minor workers contains six secretory cells on each side, while majors have 12 cells per side. The heavily sclerotized reservoir opens above the articulation of the hind-legs through a large round orifice with a diameter around 40 μm. Stiff dispenser hairs emerge from the orifice, and assist in guiding the secretory products to the exterior. The rounded to ovoid cells display a well-developed smooth endoplasmatic...

New species of the extinct ant genus Enneamerus Mayr (Hymenoptera, Formicidae) and designation of the neotype of E. reticulatus

Alexander Radchenko & Gennady M. Dlussky
A new species of the peculiar extinct myrmicine ant genus Enneamerus Mayr is described from Baltic amber (Late Eocene, Priabonian, ca. 34-38 Ma), and a neotype of E. reticulatus Mayr is designated. Enneamerus costatus sp. nov. differs from the previously known E. reticulatus by its much coarser, costulate sculpture on the frons and by the absence of long erect hairs on the antennal scape. Some additional diagnostic features for Enneamerus are provided and the taxonomic...

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

Brigitte Fiala, , 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...

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

, Bruno Gobin &
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.

Nesting site selection of Temnothorax congruus from Japanese broad-leave forests: a trade-off between nest site quality and distance from sympatric Crematogaster teranishii colonies

Kazutaka Syoji &
Intra- and interspecific competition for resources such as food and nesting sites, as well as other biotic and abiotic factors, affect colony distribution of ant species. Through a series of laboratory experiments using Temnothorax congruus and its putative sympatric competitor Crematogaster teranishii we investigated whether nesting site selection by T. congruus is affected by the presence of C. teranishii. In the absence of C. teranishii, T. congruus colonies preferred plastic tubes with narrower entrances and...

Ant gardens of Camponotus (Myrmotarsus) irritabilis (Hymenoptera: Formicidae: Formicinae) and Hoya elliptica (Apocynaceae) in Southeast Asia

Andreas Weissflog, Eva Kaufmann & Ulrich Maschwitz
Camponotus irritabilis (Formicidae: Formicinae) and Hoya elliptica (Apocynaceae) are very closely associated in ant gardens in Malaya and Sumatra. Ants and epiphyte partners have some characteristics that make them especially suitable for this association: The ants selectively retrieve the seeds of their epiphyte partners, and they fertilize their carton nests on which the plants are growing. In comparison to non-myrmecophytic Hoya coriacea, Hoya elliptica performs an extensive root growth as long as growing on moist...

Ants in the city, a preliminary checklist of Formicidae (Hymenoptera) in Macau, one of the most heavily urbanized regions of the world

, &
Macau is a small territory in South East China and one of the most densely populated regions in the world. Previous studies on insect groups have shown that a relatively diverse, yet specific, fauna could still survive in this region. However, to this point, studies on the myrmecofauna of Macau are scarce and to date no species checklist exists. Here, we present the first checklist of Macanese ant species by combining results from recent ant...

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