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, doorhead ant. Doorhead ant 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.

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Doorhead ant

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. Recent studies of Corythomantis greeningi , a casque-headed tree frog from semi-arid areas, have provided substantial information regarding the water economy associated with co-ossification of the head. Upon further investigation, it has been found that cranial co-ossification contributes little to conservation of water, but instead has a primary role of defence. This type of skull morphology primarily acts to protect the animal against predators , and in doing so, leads to an indirect enhancement of water balance within the body. In the study conducted by Jared et al. The study found that while phragmotic behaviour does not provide a significant reduction in water evaporation, it is important for preventing desiccation. The Mexican hylid casque-headed frog, Pternohyla fodiens , utilizes the head casque to close the entrance of its refuge in a tree cavity by deflecting the head.

In one particular study, doorhead ant, Scott Powell tested the hypothesis that "specialized use of cavities with entrances close to the area of one ant head has selected for a morphologically and behaviorally specialized soldier in Cephalotes.

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,

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. Recent studies of Corythomantis greeningi , a casque-headed tree frog from semi-arid areas, have provided substantial information regarding the water economy associated with co-ossification of the head. Upon further investigation, it has been found that cranial co-ossification contributes little to conservation of water, but instead has a primary role of defence.

Doorhead ant

Learn how to get rid of big headed ants with our comprehensive guide. Identify, understand their behavior, and find effective treatment options to keep them away. Big headed ants, scientifically known as Pheidole megacephala, are a common household pest found in many parts of the world. They are named after their distinctive large heads, which are used to store food and regulate the temperature of their bodies.

Hendraheim

Phragmotic-headed ants, for instance, prevent intruders from entering nests by blocking the entrances or by pushing them out of entrance galleries. Just wedge your head into the entryway of your home. Cephalotes is a genus of tree-dwelling ant species from the Americas , commonly known as turtle ants. The eyes close tightly, fore-legs are brought forward and upward, and hind-legs are flexed upward. The material acts as a coating and eventually accumulates into a dense tangle of material, creating a disk over the head. Photo Gallery. Within this group, some frogs are characterized by a peculiar casqued head, with the skin co-ossified with the underlying bones. Pores were visible along part of the central ridge see Fig. Depending on the species, their heads can secrete fibers that resemble fungi or have small Velcro-like hairs to catch nearby debris, making a natural toupee that blends right in. Make a monthly donation. The aphid Astegopteryx sp. 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. These ants were found dead in leaf litter samples. The same may be true for the new Carebara ants, Powell thinks.

The bigheaded ant BHA , Pheidole megacephala Fabricius , is a very successful invasive species that is sometimes considered a danger to native ants and has been nominated as among of the "World's Worst" invaders Hoffman Figure 1. Bigheaded ant, Pheidole megacephala Fabricius , foraging tubes on a palm tree.

Cephalotes is a genus of tree-dwelling ant species from the Americas , commonly known as turtle ants. Possible causes:. Wikimedia Commons Wikispecies. They bear the scars of this job of sticking their head in the hole all day long. The hunt is on to learn why bowel cancer in young people is rising. See stories by Glenn Marangelo. 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. Linnaeus , The same may be true for the new Carebara ants, Powell thinks. D-Wave says its quantum computers can solve otherwise impossible tasks. Genus of ants. The surprising promise and profound perils of AIs that fake empathy. Make a one-time donation. The fossil record is restricted to the Miocene with species recovered from both Dominican and Mexican ambers. These ants were found dead in leaf litter samples.