ISSN:
1573-5117
Keywords:
Calanoid copepod
;
taxonomy
;
Sinodiaptomus valkanovi
;
S. sarsi
;
limnoplankton
;
Japan
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The limnoplanktonic calanoid copepod Sinodiaptomus valkanovi (Diaptomidae: Diaptominae) is redescribed in detail from Japan, where it commonly occurs in ponds and reservoirs especially around the Seto Inland Sea. The species has been referred to as a subspecies of S. sarsi outside Japan due to lack of subsequent morphological comparisons. Sinodiaptomus valkanovi is easily distinguishable from S. sarsi by having longer antennules in both sexes, a short projection on the right antennule segment 15 of the male, and a thumb-like posterodistal basal projection of the male left leg 5. These characters do not show significant variation, indicating differentiation at the species level. S. valkanovi is restricted to Japan, in contrast to the wide-range of it S. sarsi in Asian waters. The Bulgarian population, from which the species was originally described, and the North American population, which was formerly recorded as S. sarsi, are considered to have been introduced from Japan with aquatic plants such as water lilies.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1003435701993
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