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INHS Annelid Collection | Terrestrial Oligochaeta (1253 words) |
 | Twelve families of earthworms occur in North America north of Mexico - Acanthodrilidae, Criodrilidae, Lutodrilidae, Glossoscolecidae, Komarekionidae, Lumbricidae, Eudrilidae, Megascolecidae, Octochaetidae, Ocnerodrilidae, Sparganophilidae, and Haplotaxidae (most often considered an aquatic microdrile family, with one genus and one nominal species in North America); we recognize 40 genera and 159 nominal species in these families. |
| Of these, 47 nominal species representing 22 genera in 8 families occur in Illinois. |
| gordioides (Haplotaxidae), a species that has not yet been collected in its sexually mature state in North America, is most commonly associated with groundwater habitats (springs, cave streams, wells, cisterns). |
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