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Lifestages of a holometabolous insect ().Egg is not shown. Third, fourth, and fifth images depict different ages of pupae. Holometabolism, also called complete metamorphosis, is a form of insect development which includes four life stages: egg, larva, pupa, and imago (or adult).
Insect blood or haemolymph's main function is that of transport and it bathes the insect's body organs. Making up usually less than 25% of an insect's body weight, it transports hormones, nutrients and wastes and has a role in, osmoregulation, temperature control, immunity, storage (water, carbohydrates and fats) and skeletal function. It also ...
A larviform female of the Lampyridae.Unlike actual larvae, she has compound eyes.. Larviform female is a biological phenomenon occurring in some insect species, where the females in the adult stage of metamorphosis resemble the larvae to various degrees, while the male appears more morphologically adult (as imagoes).
In insects, growth and metamorphosis are controlled by hormones synthesized by endocrine glands near the front of the body ().Neurosecretory cells in an insect's brain secrete a hormone, the prothoracicotropic hormone (PTTH) that activates prothoracic glands, which secrete a second hormone, usually ecdysone (an ecdysteroid), that induces ecdysis (shedding of the exoskeleton). [7]
Male genitalia of Lepidoptera. The main component of the male reproductive system is the testicle, suspended in the body cavity by tracheae and the fat body.The more primitive apterygote insects have a single testis, and in some lepidopterans the two maturing testes are secondarily fused into one structure during the later stages of larval development, although the ducts leading from them ...
The forelegs are reduced in the Nymphalidae Diagram of an insect leg. The thorax, which develops from segments 2, 3, and 4 of the larva, consists of three invisibly divided segments, namely prothorax, metathorax, and mesothorax. [11] The organs of insect locomotion – the legs and wings – are borne on the thorax.
Holometabola (from Ancient Greek holo-"complete" + metabolḗ "change"), also known as Endopterygota (from endo-"inner" + ptéryg-"wing" + Neo-Latin-ota "-having"), is a supra-ordinal clade of insects within the infraclass Neoptera that go through distinctive larval, pupal, and adult stages.
The female of J. ningchengensis had wings, supporting Ross's proposal that both sexes of ancestral Embioptera were winged. [9] Species such as Atmetoclothoda orthotenes , possibly the first fossil member of the Clothodidae to be discovered, sometimes thought to be a "primitive" family, have been found in mid- Cretaceous amber from northern Myanmar.