What does physogastry mean?

Last Update: April 20, 2022

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Asked by: Ms. Carole Mosciski DDS
Score: 4.3/5 (4 votes)

Physogastrism or physogastry is a characteristic of certain arthropods, where the abdomen is greatly enlarged and membranous.

What is meant by physogastry?

Physogastrism or physogastry is a characteristic of certain arthropods (mostly insects and mites), where the abdomen is greatly enlarged and membranous. ... Physogastric queens produce an enormous number of eggs which can account for a significant amount of their body weight.

Which insect exhibit physogastry?

The physogastric termite queen is the most striking example in insects of growth in size without cuticular moulting. This phenomenon has been studied with electron microscopy and histochemical tests in two species of higher termites, Cubitermes fungifaber and Macrotermes bellicosus.

What is a physogastric queen termite?

Termite Biology

In most species that cause economic loss in Australia the queen becomes 'physogastric'. This means she has a grossly enlarged abdomen to enable her to lay millions of eggs. She essentially becomes an egg laying machine. ... Worker termites are wingless, blind and do not reproduce.

Where are termites found?

Most termite species are found in the tropics, but several dozen species are found throughout the United States, including Hawaii, Puerto Rico, and the U.S. Virgin Islands. Alaska is the only U.S. state without termites.

What Does It Mean to Be Asexual?

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What order are termites in?

Class: Insecta – Insects have three part bodies, three pairs of legs, and two antennae. Order: Isoptera – Meaning “equal wing” because the front and rear wings of the reproductive alates are of the same length. Family: There are seven families of termites worldwide.

Which insect is known as worker?

Honey bees is called the 'worker insect'

In which insect right mandible is absent?

Right mandible is absent. Stylets are useful to lacerate the plant tissue and the oozing sap is sucked up by the mouth cone. Both maxillary palpi and labial palpi are present. Mandibulosuctorial type : e.g. grub of antlion Mandibles are elongate sickle shaped and grooved on the inner surface.

What is Hypognathous head?

1 : having the lower jaw longer than the upper. 2 : having the mouthparts ventrally directed —used especially of certain insects with biting mouthparts directed downward and often somewhat backward — compare prognathous.

What family are termites in?

Termites are eusocial insects that are classified at the taxonomic rank of infraorder Isoptera, or alternatively as epifamily Termitoidae, within the order Blattodea (along with cockroaches).

Which insect has Hypognathous head?

1. Hypognathous - this is the primitive condition. This is where the head is more or less vertical and the mouthparts are directed ventrally. Example: the grasshopper.

What kind of head is grasshopper?

The head of the grasshopper is a hard capsule that contains large muscles, which operate the chewing mouthparts, and the brain and subesophageal ganglion, which serve as the main centers of the nervous system.

Is cockroach is Hypognathous?

The head in cockroaches is called Hypognathous because it is bent right angles to the longitudinal axis of the body, as a result of which the jaws are directed downwords.

What is biting and chewing insect?

Some common biting and chewing insect pests are beetles, grasshoppers, termites, crickets, caterpillars of moths and butter flies, locust, army worms and so on. They feed on many crops such as okro, maize, rice, vegetables, cassava and fruit trees.

Is the harmful insect?

Harmful insects are the species that cause damage to humans and their livestock, crops and possessions worldwide. Some are direct pests in that they attack the body of the host organism (plant or animal) and either suck sap or blood or eat the tissues.

Do insects have tongues?

In fact, insects' mouths, in general, do not look anything like human mouths. Instead of having a tongue, teeth, and gums, insects have “mouthparts” (scientists aren't the most creative individuals when it comes to naming things). Mouthparts are shaped differently in different insects.

Which animals work the hardest?

Here are eight of nature's hardest workers.
  1. Arctic Tern. Arctic Terns returning to their mates with food for their chicks. ...
  2. Shrew. Photo by Kara Stenberg. ...
  3. Honeybee. A honeybee flying with a big pollen basket. ...
  4. Ants. Black worker ants dragging vegetation to the colony. ...
  5. Earthworms. An earthworm in mold. ...
  6. Hummingbirds. ...
  7. Beavers. ...
  8. Salmon.

Which insect is very hardworking?

Ants and bees are thought to be the most hardworking insects because of their exceptional skills. They both work with great dedication in order to collect food for them.

Do ants have hearts?

Ants do not breathe like we do. They take in oxygen through tiny holes all over the body called spiracles. They emit carbon dioxide through these same holes. The heart is a long tube that pumps colorless blood from the head throughout the body and then back up to the head again.

Can termites bite you?

Essentially, termites definitely bite wood and do attack other insects, but they do not bite people. Although homeowners experiencing an infestation should not be concerned about receiving bites from termites, professional extermination methods should be sought and implemented to protect the structure of your home.

What attracts termites to a house?

While all termites are attracted to wood, they each have specific preferences. ... Homeowners might unknowingly bring termites inside in firewood or untreated lumber. In addition to wood inside the home, termites are drawn inside by moisture, wood in contact with house foundations, and cracks in building exteriors.

What is the life cycle of an earwig?

Earwigs undergo three stages of a simple metamorphosis throughout their lives: egg, nymph, and adult. This a simpler or incomplete metamorphosis since they lack stages of growth such as the larvae and the pupa.

Why is cockroach head called Hypognathous?

The mouthparts of the cockroach are directed downwards. The head is small, triangular lies at a right angle to the longitudinal body axis. Hence it is called hypognathous.

Which structure is called Tongue of cockroach?

On the floor of the mouth is tongue like structure called hypopharynx.

How many pairs of legs are present in a cockroach?

Thorax. On the thorax, all cockroaches have three pairs of legs. Adults of most of the domestic species have two pairs of wings, although one species, the oriental cockroach, has poorly- developed wings in both sexes.