Doorhead ant

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Phragmosis is any method by which an animal defends itself in its burrow , by using its own body as a barrier. Wheeler , while describing the defensive technique exhibited by insects. Examples of phragmosis are found in the order Anura frogs and toads. Some species, such as Pternohyla fodiens and Corythomantis greeningi , have evolved a peculiarly casqued head adapted to protect the animal as it backs down a hole. Anurans involve a diverse group of largely carnivorous , short-bodied, tailless amphibians. Within this group, some frogs are characterized by a peculiar casqued head, with the skin co-ossified with the underlying bones. This type of skull is generally associated with phragmotic behaviour, where the animal will enter a hole and block the entrance with its head.

Doorhead ant

Species : ants from several genera, including Cephalotes and Carebara Habitat : trees in the tropical forest. Just wedge your head into the entryway of your home. Weird as it sounds, such traits have evolved again and again, in a specialised caste of species from at least eight ant genera — including two new species just discovered in Ivory Coast and Kenya. Only a single example of door head ant was discovered in Africa before this. That lone saucer-headed ant, picked out of leaf litter in Kenya, looked so different from its normal nest mates that it was wrongly assigned its own species. Now a team led by Georg Fischer at the Okinawa Institute of Science and Technology in Japan, has discovered further examples of this ant and fixed its classification. They also found another species of door head ant in Ivory Coast — meaning that Africa, which is chronically understudied, has at least two ant species from the genus Carebara in which workers act as living bulkheads. These ants were found dead in leaf litter samples. Intriguingly, they look much like the door head ants in the New World: ants from the tree-dwelling genus Cephalotes. Shaped like shields or hubcaps, Cephalotes heads are a perfect fit for the tunnels left over by wood-boring beetles in tree trunks. With such tunnels in short supply, invader ants and parasites find them attractive targets for raids, so the ants have to mount a defence.

Read Edit View history. Phragmotic-headed ants, doorhead ant instance, prevent intruders from entering nests by blocking the entrances or by pushing them out of entrance galleries.

Contents move to sidebar hide. Brandao et al. Wheeler , to describe a cryptic defensive technique employed by insects that use specially modified body structures to block nest entrances. Phragmotic-headed ants, for instance, prevent intruders from entering nests by blocking the entrances or by pushing them out of entrance galleries. Shield-like-headed soldiers and queens of the Neotropical myrmicine Cephalotes species of the pallens group appear to secrete a fibrous material from thousands of pores that resemble glandular openings, coating and eventually accumulating in a dense tangle of material over the head disk. This material is superficially similar to a mass of fungal filaments mycelia , but does not have the branching pattern or internal structure indicative of a fungal origin de Andrade and Baroni Urbani,

Odontomachus brunneus is a species of ant in the subfamily Ponerinae , found in the southeastern United States , parts of Central America , and the West Indies. Ants of the genus Odontomachus are commonly called trap-jaw ants , due to the large, straight mandibles , which can be opened to degrees and snapped shut on prey. When sensory hairs on the inside of the mandibles are touched, the trap jaw is triggered. The mandibles also permit slow and fine movements for other tasks such as nest building and care of larvae. Foraging is often slow during the breeding period due to the amount of Odontomachus brunneus ants reproducing, but is doubled by the time the breeding period comes to an end. Trap-jaw ants of this species have the fastest moving predatory appendages within the animal kingdom.

Doorhead ant

When the Ant faints , it buffs the stats of one of its friends. The friend buffed is chosen at random, and the size of the buff increases with the Ant's level. The Ant's stats are mediocre, but its ability is incredible for a Tier 1 Pet. Not only does the Ant's good attack mean it can trade with most tier 1 pets, but its huge buff when fainting often allows one of its friends to get an extra KO, meaning the Ant usually trades 2-for However, this doesn't always pan out in practice.

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Tools Tools. The presence of many pores, which are presumably attached to glands, are the likely source of secreted fibrous and filmy substances that were detected. Contents move to sidebar hide. Because ants within Cephalotes use multiple carved nesting cavities found in the trees upon which they live, a cohort of morphologically specialized soldiers has evolved to defend these nesting cavities. Region on central ridge on which pores are visible. Life Bumblebees show each other how to solve complex puzzles. Retrieved 18 November Note central ridge, b. Article Talk. Read View source View history. Blepharidatta conops Carebara butteli Carebara colobopsis Carebara elmenteitae Carebara lilith Carebara nayana Carebara phragmotica Cephalotes Colobopsis Colobostruma leae Crematogaster cylindriceps Hypercolobopsis Pheidole colobopsis Pheidole embolopyx Pheidole lamia Pheidole obturaculum Tetraponera phragmotica. PMID See on Sketchfab. Charismatic explanation: Thou art loosed! The ergatoid queen of Blepharidatta conops Formicidae, Myrmicinae blocks the entrance of the brood chamber".

Species : ants from several genera, including Cephalotes and Carebara Habitat : trees in the tropical forest. Just wedge your head into the entryway of your home. Weird as it sounds, such traits have evolved again and again, in a specialised caste of species from at least eight ant genera — including two new species just discovered in Ivory Coast and Kenya.

Tags Bug Bytes ants bugs. Support MTPR. The soldier aphids of Astegopteryx are characterized by their sclerotic, protruded heads, covered in many spine-like setae. Life History. Cephalotes atratus , Soberania National Park, Panama. They discovered Cephalotes pallens do in fact have encrusted material on their head disks. In a study by Kurosu et al. This modification of the body enables the queen to act as a living gate to the brood chamber. See on Sketchfab. Allow cookies Cookies settings. JSTOR The results of this experiment support the concept that the most specialized soldier phenotype in Cephalotes is a result of adaptation to ecological specialization within a narrow subset of available nests. Stay Connected. And there are workers, which can vary in size depending on their job.