&lt;i&gt;Limnotrachelobdella okae&lt;/i&gt; (Hirudinida: Piscicolidae) Parasitic on Big-scaled Redfin, &lt;i&gt;Pseudaspius hakonensis&lt;/i&gt; (Cypriniformes: Leuciscidae), in Two Brackish Water Lakes, Hokkaido, Japan
Species diversity