Abstract
Two new species of monogeneans were collected:Pseudodactylogyroides marmoratae n. sp. from the gills of a freshwater eleotridid,Oxyeleotris marmorata; andP. butisensis n. sp. from a marine eleotridid,Butis butis. They are attributed to the genusPseudodactylogyroides Ogawa, 1986 based on the presence of two pairs of anchors (a large pair and a very small pair) and patches on the large pair. The two small anchors are not needle-like, as inPseudodactylogyroides apogonis, the only previously known species of the genus, but have definite anchor-like features. Descriptions of these two new species are presented. Examinations of the oncomiracidia and post-larvae of the specimens fromO. marmorata revealed that the small anchors develop before the large anchors. On the basis of the present observation the diagnostic characteristics of the genusPseudodactylogyroides are amended.
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