Cnidarian Characters

Cnidarian characteristics of the myxozoan Thelohanellus nikolskii.


Structures seen in the development of the so-called "polar capsule" of Thelohanellus nikolskii labeled in accordance with the homologous structure in cnidarian nematocysts.

Figures A through D represent the earliest stage in cellular ontogeny through to that of the mature nematocyst respectively.


c, cnidocyte; pt, preinverted tubule; np, nematocyst primordium; s, differentiating sporogenic cells. Scale bar = 1 um.

c, cnidocyte; pt, preinverted tubule; np, nematocyst primordium; th, tubular thread; Scale bar = 1 um.

c, cnidocyte; np, nematocyst primordium; it, inverted tubule; s, differentiating sporogenic cells. Scale bar = 1 um.

c, cnidocyte; ai, atrichous izorhiza, sh, shaft of atrichous izorhiza; op, opercular cap of atrichous izorhiza; N, mature nematocyst; Scale bar = 1 um.

The findings presented herein are in press at the Journal of Parasitology under the the title THE DEMISE OF A PHYLUM OF PROTISTS: PHYLOGENY OF MYXOZOA AND OTHER PARASITIC CNIDARIA. by Mark E. Siddall, Donald S. Martin, Diane Bridge, Sherwin S. Desser, and David K. Cone. None of the figures or data presented here can be reproduced without the consent of the authors or of the Journal of Parasitology.