What are examples of Hypognathous?
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.
Which insect has Hypognathous head?
The hypognathous position is evident in most major groups of insects and can be seen in the grasshopper, house fly, and honey bee. Other conditions are probably derived from ancestors with a hypognathous head.
Which insects has Prognathous type of head?
In dragonflies and mayflies, the mouthparts are oriented downwards with respect to the cephalocaudal axis (orthognathous), whereas earwigs and stoneflies have prognathous (forward projecting) mouthparts.
What does Prognathous face mean?
Medical Definition of prognathous : being or having a jaw and typically a lower jaw that projects forward especially to an unusual degree.
Why head of cockroach is 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.
What is tentorium in cockroach?
The tentorium (plural tentoria) is a term used to refer to the framework of internal supports within an arthropod head. The tentorium is formed by ingrowths of the exoskeleton, called apophyses, which fuse in various ways to provide rigid support for the muscles of the head.
What is the function of insect antennae?
Insects do this with the pair of antennae on their heads. But insects don’t only use their antennae to smell. They can also use them to feel the surface of an object, sense hot and cold, listen to sounds or detect the movement of air or wind.
What is Gena in insect?
Gena: The sides of the head below the compound eyes. Frons: The front part of the head between the compound eyes and the mouthparts. Clypeus: A part of the head in between the frons and the labrum.
What is Prognathous skull?
Prognathism is a positional relationship of the mandible or maxilla to the skeletal base where either of the jaws protrudes beyond a predetermined imaginary line in the coronal plane of the skull.
What is Prognathous jaw?
Prognathism is an extension or bulging out (protrusion) of the lower jaw (mandible). It occurs when the teeth are not properly aligned due to the shape of the face bones.
What is cockroach head?
Hypognathous is the type of orientation of insect head. The long axis of the head is vertical i.e., at the right angle to the long axis of the body. The mouthparts point downwards e.g., grasshopper, cockroach etc. So, the correct answer is ‘Hypognathous’
Which one of the following is not a sensory structure in cockroach?
So, the correct answer is ‘Proventriculus’.
What is the meaning of the word hypognathous?
Here are all the possible meanings and translations of the word hypognathous. hī-pog′nā-thus, adj. ( ornith.) having the under mandible longer than the upper, as the black skimmer.— n. Hypog′nathism.
What words have the affix-gnathous in them?
Other words that use the affix -gnathous include: mesognathous, metagnathous, opisthognathous, orthognathous, prognathous Read about the team of authors behind Collins Dictionaries.
What words use the affix Hypo-?
Other words that use the affix hypo- include: hypocaust, hypocrisy, hypogynous, hypothetical, hypotonic; -gnathous is a combining form meaning “having a jaw” of the kind or in the position specified by the initial element. Other words that use the affix -gnathous include: mesognathous, metagnathous, opisthognathous, orthognathous, prognathous