Nymph (from other Greek: νύμφη , here is a chrysalis, larva, literally - a bride, a girl) is the traditional name for the larval stage of development of some arthropods with incomplete transformation ( ticks and a number of insect groups).
The development of arthropods with incomplete transformation has only three stages:
- The egg
- Nymph (looks very similar to an adult, but does not have puberty),
- Imago (sexually mature individual).
After repeated links, the nymph turns into a sexually mature individual (without going through the pupal stage).
Tick Nymphs
At each stage of development ( larva , nymph and adult ), ticks must at least once drink the blood of the host vertebrate before they can move on to the next stage. Male ticks with short-term suction do not feed on blood, but suck out a small amount of tissue fluid. The larvae feed on the host for 2–5 days, after which they disappear, they molt, and they turn into nymphs. In turn, nymphs again attach themselves to the vertebral host for 2-7 days, then their metamorphosis occurs, and they become adult individuals ( adults ).
Winged Insect Nymphs
Dragonfly Nymphs
All dragonflies necessarily lay eggs in the water, and their development passes through the water stage - the nymph (also called naiadah ). All dragonfly nymphs are voracious predators, grabbing prey by a modified lower lip - a mask that quickly opens and is thrown forward, while the teeth on its front end are deeply pierced by the victim. When the mask is folded, the prey is pulled to the mouth and chewed calmly. The hind gut serves for nymphs to breathe, which, like a pump, constantly pumps oxygen-rich water through the anus into the gills. According to the size, structural features and habits of nymphs, dragonflies are divided into a number of groups, mainly by suborders.
Sources and links
- G. Ya. Bey-Bienko , General Entomology, 2nd ed., M., 1971
- A. N. Popova . Dragonfly larvae of the fauna of the USSR (Odonata). M.-L., 1953