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Spinitectus acipenseri Choudhury & Dick, 1992 from Acipenser fulvescens of Canada, scanning electron micrographs. (A) Anterior part of body, lateral view; (B) anterior end, ventral view; (C) cephalic end, apical view; (D) female tail, ventrolateral view; (E) anterior end of body, apical view (focused on anterior rows of cuticular spines); (F) tail tip of male, ventral view (arrows indicate postanal papillae of two posteriormost pairs); (G) ventral precloacal tesellated cuticular ridges of male, ventral view. (a) amphid; (c) cephalic papilla; (e) excretory pore; (l) pseudolabium; (p) phasmid; (s) anus.
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