CLASSIFICATION OF LEPISMA (SILVER FISH)
KINGDOM :- ANIMALIA (Multicellular eukaryotic organisms)
PHYLUM :- ARTHROPODA (Jointed appendages.)
CLASS :- INSECTA (3 pairs of legs.)
ORDER :- ZYGENTOMA (Body covered with small scales.)
FAMILY :- LEPISMATIDAE (Wingless insects.)
GENUS :- Lepisma (Silver fish)
It is found all over Asia, Europe and U.S.A.
HABIT AND HABITAT
Lepisma is a common household pest, hiding in damp cool places like basements, in books, under pictures, clothes and wall-paper, etc., and feeding on starch, starched cloth, paste or glue of book bindings. It is a fast runner insect.
GENERAL CHARACTERSTICS OF LEPISMA (SILVER FISH)
- Commonly known as silver fish.
- It is a delicate, glistening silver white and fish-shaped insect, which avoids light. (3) Adults are primitively wingless.
- Animal measures 1.25 cm in length and is divided into head, thorax and abdomen.
- Body surface is covered with loosely attached scales.
- Head contains a pair of long many jointed antennae and a pair of compound eyes.
- Antennae joints are incapable of independent movement and it moves as a whole upon its base.
- Mouth parts adapted for biting. Thorax has 3 pairs of small walking legs present.
- Abdomen has 11 segments with a pair of small appendages, a pair of many jointed and Cerci and a median many jointed telson.
- Development epimorphic, i.e., the number of post-cephalic segments increases by proliferation in the hind part of the body following the first embryonic stages, but becomes fixed during the embryonic period. Thus the animal hatches from the egg with the adult number of segments.
Silver fishes cause considerable damage to the books and clothing by chewing off the starch, sizing or any other articles containing glue.
The animal has silvery white body and all above characters, hence it is Lepisma.