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==References==
==References==
*{{cite journal | last1 = Fend | first1 = S. V. | last2 = Ohtaka | first2 = A. | year = 2004 | title = Yamaguchia toyensis'' n. sp., n. gen. (Annelida, Clitellata, Lumbriculidae) from Profundal Lake Habitat in Japan | url = | journal = Zoological Science | volume = 21 | issue = | pages = 677–683 }}
*{{cite journal | doi = 10.2108/zsj.21.677 | last1 = Fend | first1 = S. V. | last2 = Ohtaka | first2 = A. | year = 2004 | title = Yamaguchia toyensis'' n. sp., n. gen. (Annelida, Clitellata, Lumbriculidae) from Profundal Lake Habitat in Japan | url = | journal = Zoological Science | volume = 21 | issue = 6| pages = 677–683 | pmid = 15226590 }}


[[Category:Lumbriculidae]]
[[Category:Lumbriculidae]]

Revision as of 10:26, 4 December 2010

Yamaguchia toyensis
Scientific classification
Kingdom:
Phylum:
Class:
Subclass:
Order:
Family:
Genus:
Yamaguchia
Species:
Y. toyensis
Binomial name
Yamaguchia toyensis
Fend & Ohtaka, 2004

Yamaguchia toyensis is one of many aquatic oligochaetes belonging to the family Lumbriculidae discovered on Hokkaidō, which seems to be one of three "hotspots" of lumbriculid diversity (the others being the Rocky Mountains and Lake Baikal. The genus named after the great oligochaete taxonomist Professor Hideji Yamaguchi.

Y. toyensis was originally collected from profundal parts of Lake Toya, Hokkaido (after which it is named), and is among the shortest of the lumbriculids (7–11 mm). It is uncertain where in the phylogeny of the lumbriculids Y. toyensis belongs. It seems to lack novel characters with which to place it unambiguously, but has a combination of features not found in other genera of the family: testes and atria in segment X, a single, prosoporous male funnel per atrium, and spermathecae in segment XI.

References

  • Fend, S. V.; Ohtaka, A. (2004). "Yamaguchia toyensis n. sp., n. gen. (Annelida, Clitellata, Lumbriculidae) from Profundal Lake Habitat in Japan". Zoological Science. 21 (6): 677–683. doi:10.2108/zsj.21.677. PMID 15226590.