Haliplidae

Haliplidae is the name of a family small Coléoptère S watery, which gathers approximately 200 species in five kinds, distributed in the whole world.

They are considered relatively bad sometimes named swimmers and for this reason crawling toilets beetles (crawling watery coleopters) 'by the Anglo-Saxons

Description

Their form is generally oval, with lengths varying from 1.5 to 5 millimetres.

Color: yellowish with brown clearly. Their élytres is frequently decorated clear and dark dotted lines (10 lines or more)

The eyes exceed small head distinctly.
Les legs is furnished with swimming hairs, but the most distinctive characteristic of this family is the presence of a large ventral plate making it possible to store an minor amount of air, complementary to that stored under the élytre S

The Haliplidés live in the watery vegetation on the écotone consisted the Berge S and edges edges of small stagnant , stretches of water Lac S, ditches and sometimes of calm rivers.

The adults are Omnivore S, consuming eggs of insects, small shellfish, Hydrozoaires, polyps and Algue S, whereas the larvae nourish only algae.

Reproduction and development

In this family, the species of Peltodyte S deposit their eggs on the surface of watery plants, whereas the Haliplus “mastiquent” a cavity in the plants to protect their eggs there.

There is of three larva, and the Pupe is formed on the ground in a room built in the ground by the larva.

Classification

Taxonomy

Subdivision of the family:

Algophilus
Apteraliplus
Brychius
Haliplus
Peltodytes

Separate group?

Haliplidés are they a separate group? The majority of the entomologists believe that they developed starting from the terrestrial coleopters separately of other types of watery coleopters. In 2001, the family needed to be revised, the last general catalog having been published by A. Zimmermann in 1920.

Threats

The richness and the genetic diversity of group were regressed probably much with disappearance, the degradation and the fragmentation of their habitat. A species, Brychius hungerfordi, is classified in the process of disappearance in the USA, being found more only in the Michigan and in Ontario.

Notes and reference

R.E. Roughley, " Haliplidae" , in Ross H. Arnett, Jr. and Michael C. Thomas, American Beetles (CRC Near, 2001), vol. 1

External links

http://www.haliplidae.org/
Tree off Life page, with pictures
FWS information one '' Brychius hungerfordi ''

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