Lumbriculus kareliensis
Encyclopedia
Lumbriculus kareliensis, an Annelid worm
Annelid
The annelids , formally called Annelida , are a large phylum of segmented worms, with over 17,000 modern species including ragworms, earthworms and leeches...

, was described by Popchenko in 1976 from material collected in Karelia
Karelia
Karelia , the land of the Karelian peoples, is an area in Northern Europe of historical significance for Finland, Russia, and Sweden...

. It is distinguished from other species in the genus by the position and shape of the atrium, which is large and kidney-shaped, reaching form the male pore in segment X into segment XI. Unlike all other Lumbriculus
Lumbriculus
Lumbriculus is a genus of oligochaetes....

species, the ovary is located two segments posterior to the atrium. The spermathecae are oval, and positioned dorsally.
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