Platythyrea Temporal range: Eocene – Recent | |
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Platythyrea punctata worker | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Hymenoptera |
Family: | Formicidae |
Subfamily: | Ponerinae |
Tribe: | Platythyreini Emery, 1901 |
Genus: | Platythyrea Roger, 1863 |
Type species | |
Pachycondyla punctata Roger, 1863 | |
Diversity [1] | |
45 species | |
Synonyms | |
EubothroponeraClark, 1930 |
Platythyrea is a genus of predaceous ants in the subfamily Ponerinae and the sole member of the tribe Platythyreini. [2]
The genus has a worldwide distribution, and is found in the tropics and subtropics of the world. [3]
Workers are small to very large in size (4–20 mm). Gamergates (reproductive female workers) are known from all studied species except one, P. conradti, which have ergatoid queens (wingless reproductive ants, intermediate in form between workers and winged queens). Some species with gamergates also have alate queens, which are similar to the workers but winged. [3]
Parthenogenesis is a natural form of reproduction in which growth and development of embryos occur without fertilisation. Thelytoky is a particular form of parthenogenesis in which the development of a female individual occurs from an unfertilized egg. Automixis is a form of thelytoky, but there are different kinds of automixis. The kind of automixis relevant here is one in which two haploid products from the same meiosis combine to form a diploid zygote (see diagram).
Colonies of Platythyrea punctata from Florida and the Caribbean Islands produce offspring almost exclusively by automictic thelytoky. [4] Automixis appears to involve central fusion of two of the haploid products of meiosis (see diagram). This form of automixis tends to maintain heterozygosity in transmission of the genome from mother to offspring, and to minimize inbreeding depression. Furthermore, crossover recombination occurs at a greatly reduced rate during meiosis, [4] which likely restrains the transition from heterozygosity to homozygosity.
Hymenoptera is a large order of insects, comprising the sawflies, wasps, bees, and ants. Over 150,000 living species of Hymenoptera have been described, in addition to over 2,000 extinct ones. Many of the species are parasitic. Females typically have a special ovipositor for inserting eggs into hosts or places that are otherwise inaccessible. This ovipositor is often modified into a stinger. The young develop through holometabolism —that is, they have a wormlike larval stage and an inactive pupal stage before they mature.
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.
Myrmicinae is a subfamily of ants, with about 140 extant genera; their distribution is cosmopolitan. The pupae lack cocoons. Some species retain a functional sting. The petioles of Myrmicinae consist of two nodes. The nests are permanent and in soil, rotting wood, under stones, or in trees.
Thelytoky is a type of parthenogenesis and is the absence of mating and subsequent production of all female diploid offspring as for example in aphids. Thelytokous parthenogenesis is rare among animals and reported in about 1,500 species, about 1 in 1000 of described animal species, according to a 1984 study. It is more common in invertebrates, like arthropods, but it can occur in vertebrates, including salamanders, fish, and reptiles such as some whiptail lizards.
Aphaenogaster is a genus of myrmicine ants. About 200 species have been described, including 18 fossil species. They occur worldwide except in South America south of Colombia, sub-Saharan Africa, and Antarctica.
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.
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.
Diacamma is a genus of queenless ants belonging to the subfamily Ponerinae. It is distributed from India to Australia and contains about 24 species.
Anochetus is a genus of small, carnivorous ants found in the tropics and subtropics throughout the world.
Hypoponera is a genus of ants in the subfamily Ponerinae. The genus has a worldwide distribution and is found in all continents except Antarctica.
Dolichoderus is a genus of ants found worldwide.
Ooceraea biroi, the clonal raider ant, is a queenless clonal ant in the genus Ooceraea. Native to the Asian mainland, this species has become invasive on tropical and subtropical islands throughout the world. Unlike most ants, which have reproductive queens and mostly nonreproductive workers, all individuals in a O. biroi colony reproduce clonally via thelytokous parthenogenesis. Like most dorylines, O. biroi are obligate myrmecophages and raid nests of other ant species to feed on the brood.
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.
Bothroponera is a genus of ants in the subfamily Ponerinae. It is distributed in Africa and Asia.
Ectomomyrmex is a ponerine genus of ants found in Asia and Australia. Little is known about their biology, but they seem to be generalist predators of arthropod prey.
Hagensia is a small genus of ants in the subfamily Ponerinae. Its two species are known only from coastal areas in South Africa. Workers are large (10.5–13.0 mm); queens are unknown, but gamergates occurs in both species.
Mesoponera is an Old World genus of ants in the subfamily Ponerinae. It is found in the tropics, from Sub-Saharan Africa to Australia.
Ophthalmopone is a ponerine genus of ants found in Sub-Saharan Africa. Workers are slender and large in size (8–13.5 mm). Queens seem to be absent, but gamergates present.
Pseudoneoponera is a ponerine genus of ants found from India to Australia, they are mostly non queen species, most of the species within the genus thrives on only gamergates.
Cataglyphis cursor is a species of ant in the genus Cataglyphis. Described in 1846, it is known only from the Mediterranean parts of France.