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(Biologie - Ultrastructure)
(Biologie - Ultrastructure)
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====Biologie - Ultrastructure====
 
====Biologie - Ultrastructure====
Most earthworm species have a bisexual reproduction mode, few of them being exclusive or non-exclusive parthenogenetics (i.e. ''[Eiseniella tetraedra]'' or ''[Pontoscolex corethrurus]'').
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Most earthworm species have a bisexual reproduction mode, few of them being exclusive or non-exclusive parthenogenetics (i.e. ''[[Eiseniella tetraedra]]'' or ''[[Pontoscolex corethrurus]]'').
 
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Revision as of 07:02, 20 April 2014

Taxonomic tree
► See also the Earthworm overview page

Earthworm overview

Taxonomy

The sub-order Lumbricina belongs to the phylum Annelida, Class Clitellata and order Haplotaxida. It is considered that this sub-order consists of the so-called "true earthworms". To its part, the family Haplotaxidae, sub-order Haplotaxina, is considered to be phylogenetically a basal group in regard to the classical terrestrial earthworms. The very first earthworm species, Lumbricus terrestris, was described by Carl Linnaeus in 1758. Savigny showed, in 1826, that earthworms were in fact composed of several species. Today, 20 families have been described and up to 5000 valid species are recognized.

Recent history of the higher taxonomy

To complete...

Biologie - Ultrastructure

Most earthworm species have a bisexual reproduction mode, few of them being exclusive or non-exclusive parthenogenetics (i.e. Eiseniella tetraedra or Pontoscolex corethrurus).

Ecology - Ecotoxicology

Lumbricina species are found in a large range of biota, from costal marine environments (i.e. Pontodrilus litoralis) to freshwaters (i.e. members of the Almidae family) and soils. However, most species are terrestrial, some of them living in mud or partially in freshwater. Haplotaxina species are mainly subservient to freshwater biota, including sediments.

Pictures