Open Access
Research Article

Figure 16


Download original image

Diagrams of spermatozoa (redrawn from Justine, 1991 [35]). Caption adapted from original caption of figure. Diagrams were drawn from original micrographs of transverse sections. Digenea. Dorsal and ventral microtubules are present (proposed as a synapomorphy for the Cercomeridea). There are no lateral microtubules (symplesiomorphic compared with the synapomorphy for the polyopisthocotylean Monogenea). Polyopisthocotylea. Dorsal and ventral microtubules are present (synapomorphy for Cercomeridea). Note the presence of lateral microtubules (proposed as a synapomorphy for the Polyopisthocotylea). Monopisthocotylea (uniflagellate and biflagellate). Microtubules are absent from the principal region of the spermatozoon, which is interpreted as (i) the absence of dorsal and ventral microtubules, a reversal of the synapomorphy for the Cercomeridea; and (ii) the absence of lateral microtubules, the symplesiomorphic state versus the synapomorphy for the Polyopisthocotylea.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.