Two new species of <i>Nitocrella</i> (Copepoda, Harpacticoida) from a spring in Loei Province, northeastern Thailand.

Once the sexual dimorphism is developed in appendages related to reproductive behavior/barrier (i.e., grasping mechanisms) in late copepodid or adult stages ( Gilbert and Williamson 1983 ), the shape and configuration of the transformed element of the male P1 basis in the new species seem likely to be significant in terms of the taxonomic point of view, too.

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