Lumbriculus illex
Encyclopedia
Lumbriculus illex is a fresh-water worm, the most recently described member of the genus (Timm & Rodriguez, 1994), and is known only from 3 individuals found in Komarovka stream, north of Vladivostok
Vladivostok
The city is located in the southern extremity of Muravyov-Amursky Peninsula, which is about 30 km long and approximately 12 km wide.The highest point is Mount Kholodilnik, the height of which is 257 m...

. In most regards, this species is probably similar to Lumbriculus variegatus
Lumbriculus variegatus
Lumbriculus variegatus, sometimes known as blackworm , is the name given to at least three distinct species of worms which are identical in outward appearance...

, but it can be told apart from this species by its one-pointed setae (other Lumbriculus have two-pointed setae). Its closest relative is probably L. sachalinus or L. olgae. Mature Lumbriculus can also easily be told apart by a number of genital characters, but as few of the species in the genus ever become sexually mature, it is often difficult for you to know which species you are dealing with.
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