Abstract
Abstract The only 2 published taxonomic accounts of Neoechinorhynchus tenellus are those of Van Cleave (1913) and Van Cleave (1919) from Esox lucius Linnaeus and Sander vitreus (Mitchill) (=Stizostedion vitreus (Mitchill)). While Van Cleave's original description is adequate to identify N. tenellus, his description of proboscis armature, lemnisci, reproductive system in both sexes, and eggs was either not complete or in error. We studied the original type material and found their present state to be of little use for elucidating characters that were not already illustrated and described by Van Cleave. For that reason we studied newly collected, conspecific specimens to better document key morphological features of this species. Our description of the Michigan material from the same 2 fish species was compared with the original description and with Van Cleave's cotypes (designated syntypes). Our revised description includes the following: (1) trunk of males and females is widest in anterior third tapering ...
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