Nepa cinerea
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| Nepa cinerea |
Nepa cinerea is a species of water scorpions (Nepidae), found in Central Europe and the British Isles.
It lives in ponds and stagnant water, and feeds upon aquatic animal organisms principally of the insect kind.
Respiration in the adult is effected by means of the caudal process, which consists of a pair of half-tubes capable of being locked together to form a siphon by means of which air is conducted to the tracheae at the apex of the abdomen when the tip of the tube is thrust above the surface of the water. In immature forms the siphon is undeveloped and breathing takes place through six pairs of abdominal spiracles. The eggs, laid in the stems of plants, are supplied with seven filamentous processes which float freely in the water.
[edit] References
- This article incorporates text from the Encyclopædia Britannica Eleventh Edition, a publication now in the public domain.
