Plectroctena

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Plectroctena
Plectroctena sp ants.jpg
Two workers in Tanzania
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ponerinae
Tribe: Ponerini
Genus: Plectroctena
F.Smith, 1858
Type species
Plectroctena mandibularis
F.Smith, 1858
Diversity [1]
17 species
Synonyms

CacoponeSantschi, 1914

Plectroctena mandibularis Plectroctena mandibularis, werker, Tweeling, c.jpg
Plectroctena mandibularis

Plectroctena is an Afrotropical genus of ants, with most species occurring in the rainforest zones of West and Central Africa. [2] Some species are cryptic or subterranean foragers, [2] while others forage in open grassland terrain. The workers forage singly [3] or in groups of 2 to 3. [4] They nest in the earth at varying depths, or in collapsed logs. They prey mainly on millipedes, including their young or eggs. [2]

Contents

Colony structure

A colony of P. lygaria (a small species of the mandibularis-group) may number in excess of 300 adults. An excavated colony in the Ivory Coast consisted of 277 workers, 8 alate queens, and 42 alate males. Consequently 15% of their number was allocated to reproductives at the specific time. [2] The colony size of P. mandibularis however, seldom exceeds 50 individuals. [2] [3]

Nests

In a colony of P. lygaria , the nest chambers are located at shallow depth, in moist soil under dense leaf litter. The deepest chamber may be located about 7 cm below the surface, with each chamber up to 1 cm in height. [2] The chambers are specialized to house either brood or prey items. Nests of the widespread species P. mandibularis however, are composed of chambers typically located 2 feet or more below the surface, with entrances that are usually marked by large piles of earth. [3] [2]

Diet

It is believed that millipede eggs may at times constitute the exclusive diet of P. lygaria, [2] while newly emerged millipede young may be an additional food source for the smaller Plectroctena species. Larger species like P. conjugata , P. mandibularis and P. minor specialize on adult millipedes. [2]

Species

Related Research Articles

<span class="mw-page-title-main">Ponerinae</span> Subfamily of ants

Ponerinae, the ponerine ants, is a subfamily of ants in the Poneromorph subfamilies group, with about 1,600 species in 47 extant genera, including Dinoponera gigantea - one of the world's largest species of ant. Mated workers have replaced the queen as the functional egg-layers in several species of ponerine ants. In such queenless species, the reproductive status of workers can only be determined through ovarian dissections.

<i>Aenictogiton</i> Genus of ants

Aenictogiton is a genus of ants, comprising seven rarely collected species. All the species are known only from males found in Central Africa, and show a morphological and phylogenetic affinity to the army ant genus Dorylus. The dorylomorph ants include six subfamilies– Aenictogitoninae, Cerapachyinae, Leptanilloidinae, and the three army ant subfamilies Aenictinae, Dorylinae and Ecitoninae.

<i>Dorylus</i> Driver ants (genus of insects)

Dorylus, also known as driver ants, safari ants, or siafu, is a large genus of army ants found primarily in central and east Africa, although the range also extends to southern Africa and tropical Asia. The term siafu is a loanword from Swahili, and is one of numerous similar words from regional Bantu languages used by indigenous peoples to describe various species of these ants. Unlike the New World members of the former subfamily Ecitoninae, members of this genus form temporary subterranean bivouacs in underground cavities which they excavate and inhabit - either for a few days or up to three months. Also unlike some New World army ants, driver ants are not specialized predators of other species of ant, instead being more generalistic with a diet consisting of a diversity of arthropods. Colonies are enormous compared to other army ants and can contain over 20 million individuals. As with their American counterparts, workers exhibit caste polymorphism with the soldiers having particularly large heads that power their scissor-like mandibles. They are capable of stinging, but very rarely do so, relying instead on their powerful shearing jaws. Driver ant queens are the largest living ants known, with the largest measuring between 40 - 63 millimeters in total body length depending on their physiological condition.

<i>Tapinoma</i> Genus of ants

Tapinoma is a genus of ants that belongs to the subfamily Dolichoderinae. The genus currently comprises 74 described species distributed worldwide in tropical and temperate regions. Members of are generalized foragers, nesting in a wide variety of habitats, ranging from grasslands, open fields, woodlands, to inside buildings. The majority of species nest in the ground under objects such as stones or tree logs, other species build nests under bark of logs and stumps, in plant cavities, insect galls or refuse piles.

<i>Myrmica</i> Genus of ants

Myrmica is a genus of ants within the subfamily Myrmicinae. It is widespread throughout the temperate regions of the Holarctic and high mountains in Southeast Asia.

<i>Cataglyphis</i> Genus of ants

Cataglyphis is a genus of ant, desert ants, in the subfamily Formicinae. Its most famous species is C. bicolor, the Sahara Desert ant, which runs on hot sand to find insects that died of heat exhaustion, and can, like other several other Cataglyphis species, sustain body temperatures up to 50°C. Cataglyphis is also the name of an autonomous rover that won the NASA Sample Return Robot Centennial Challenge inspired by the navigation approaches used by desert ants.

<i>Crematogaster</i> Genus of ants

Crematogaster is an ecologically diverse genus of ants found worldwide, which are characterised by a distinctive heart-shaped gaster (abdomen), which gives them one of their common names, the Saint Valentine ant. Members of this genus are also known as cocktail ants because of their habit of raising their abdomens when alarmed. Most species are arboreal (tree-dwelling). These ants are sometimes known as acrobat ants.

<i>Tetramorium</i> Genus of ants

Tetramorium is a genus of ants in the subfamily Myrmicinae that includes more than 520 species. These ants are also known as pavement ants.

<i>Aenictus</i> Genus of ants

Aenictus is a large army ant genus distributed in the Old World tropics and subtropics. It contains about 181 species, making it one of the larger ant genera of the world.

<i>Thaumatomyrmex</i> Genus of ants

Thaumatomyrmex is a Neotropical genus of ants in the subfamily Ponerinae, found from Mexico to Brazil. They are notable for their pitchfork-shaped mandibles, which they use to capture millipedes of the order Polyxenida. The genus is a specialist predator of polyxenids, and one of only two ant genera known to prey upon polyxenids.

<i>Dinoponera</i> Genus of ants

Dinoponera is a strictly South American genus of ant in the subfamily Ponerinae, commonly called tocandiras or giant Amazonian ants. These ants are generally less well known than Paraponera clavata, the bullet ant, yet Dinoponera females may surpass 3–4 cm (1.2–1.6 in) in total body length, making them among the largest ants in the world.

<i>Plectroctena mandibularis</i> Species of ant

Plectroctena mandibularis is a large species of ant that ranges from the Eastern Cape, South Africa, through East Africa to Ethiopia. Their workers forage singly in open terrain, and their colony size seldom exceeds 50 individuals. It is one of the large Plectroctena species, including P. conjugata and P. minor, that specialize on adult millipedes as prey. The nest is composed of chambers that are typically located 2 feet or more below the surface, and the nest entrances are usually marked by large piles of earth.

<i>Discothyrea</i> Genus of ants

Discothyrea is a genus of small ants in the subfamily Proceratiinae. The genus is distributed in the tropics and subtropics throughout the world, where they usually nest in rotten wood, in the leaf litter, or under stones. Little is known about their biology, but ants in this genus are thought to be specialist predators of arthropod eggs and have been observed storing eggs in their nests.

<i>Neivamyrmex</i> Genus of ants

Neivamyrmex is a genus of army ants in the subfamily Dorylinae.

<i>Simopone</i> Genus of ants

Simopone is a genus of predominantly arboreal ants in the subfamily Dorylinae. The genus is widely distributed in the Old World tropics, with the majority of species in Madagascar and sub-Saharan Africa.

<i>Pristomyrmex</i> Genus of ants

Pristomyrmex is a genus of ants in the subfamily Myrmicinae.

<i>Lepisiota</i> Genus of ants

Lepisiota is an Old World genus of ants in the subfamily Formicinae. They nest in rotten wood, in standing trees or in the ground, generally in less forested areas.

<i>Psalidomyrmex</i> Genus of ants

Psalidomyrmex is a genus of ants in the subfamily Ponerinae. The genus is known from Sub-Saharan Africa, where colonies nest in rotten wood.

<i>Megaponera</i> Genus of ants

Megaponera analis is the sole species of the genus Megaponera. They are a strictly termite-eating (termitophagous) ponerine ant species widely distributed in Sub-Saharan Africa and most commonly known for their column-like raiding formation when attacking termite feeding sites. Their sophisticated raiding behaviour gave them the common name Matabele ant after the Matabele tribe, fierce warriors who overwhelmed various other tribes during the 1800s. With some individuals reaching up to 25 millimetres (0.98 in) in length, M. analis is one of the world's largest ants.

<i>Novomessor ensifer</i> Species of ant

Novomessor ensifer is a species of ant endemic to Mexico. A member of the genus Novomessor in the subfamily Myrmicinae, it was first described by Swiss entomologist Auguste Forel in 1899. N. ensifer was originally a part of the genus Aphaenogaster until a recent phylogenetic study concluded that Novomessor was genetically distinct and should be separated. The ant is a medium-sized species, measuring 5.5 to 10 millimetres. The ant is ferruginous-colored in some certain parts of the body, and small workers (nanitics) in incipient colonies are noticeably different in color and body structure.

References

  1. Bolton, B. (2014). "Plectroctena". AntCat. Retrieved 4 July 2014.
  2. 1 2 3 4 5 6 7 8 9 Bolton, B.; Gotwald, W. H.; Leroux, J-M (1976). "A new West African ant of the genus Plectroctena with ecological notes (Hymenoptera: Formicidae)" (PDF). Annales de l'Université d'Abidjan, Série E (Écologie). Archived from the original (PDF) on 12 September 2011. Retrieved 5 September 2013.
  3. 1 2 3 Arnold, G. (1915). "A monograph of the Formicidae in South Africa. Part I.". Annals of the South African Museum. 14: 1–159.
  4. Bolton, B. (1974). "A revision of the Ponerine ant genus Plectroctena F. Smith (Hymenoptera: Formicidae)". Bulletin of the British Museum. 30: 309–338.