Chrysomelinae

The chrysomelinae constitute one of Chrysomelidae which includes/understands in particular the species of the kind Chrysomela.

The members of this group are characterized by very a food high level of specialization and are protected chemically from the Prédation: each stage of the life cycle is protected chemically from the predatory ones.

the eggs contain toxins and the adults have specialized glands, located on the pronotum and the élytres, which release from glucosides of Isoxazolin-5-one esterified or not by one or two entities of nitropropanoïque Acide.
When the larvae are worried, they release from the volatile repulsive compounds which are produced and stored in nine pairs of glands exocrines located in the abdominal and thoracic area of the animal. The danger passed, those are retracted what makes it possible the larva to recover the major part of the exsudat. Contrary to the adults, the larvae release a chemical vapor cloud in order to push back the natural enemies remotely, before there was contact physique.
Les chemical analyzes of these defensive secretions made it possible to identify three families of compounds. The majority of the larvae produce Monoterpène S Méthylcyclopentanoïde S (e.g Chrysomélidial, Plagiolactone).
the second chemical defense is derived from the plant host. The larvae of Chrysomela and Phratora vitellinae which nourishes exclusively sheets of Salicaceae (kinds Salix and Populus) hydrolize a Métabolite secondary present in the sheets of their host, the Salicine, and oxidize its aglycone in order to release from the salicylic Aldéhyde.
the third strategy defensive is developed by two species of Chrysomela ( Chrysomela interrupta and Chrysomela lapponica ) pledged with the Betulaceae. It consists in pushing back the predatory ones thanks to an odorous cloud consisted the isobutyric acid and 2-méthylbutyriquei16 and their derivatives esters. A mixed metabolic way is at the origin of these compounds. The butyric acids are synthesized by the insect starting from amino-acid, but their esters are produced by reactions of Estérification S between these carboxylic acid and different alcohol S extracted the plant.

List tribes

This of Coléoptère S is divided into two tribes according to ITIS:

Chrysomelini Latreille, 1802
Timarchini Motschulsky, 1860

And a dubious kind Cadiz

NCBI recognizes four tribes:

Chrysomelini
Doryphorini

Entomoscelini

Timarchini