By Helmut Berger
This publication is the 3rd of six volumes which evaluate the Hypotricha, an important staff of the spirotrichous ciliates. it really is concerning the Amphisiellidae, the Trachelostylidae, and a few genera of unknown place within the Hypotricha. extra, it includes supplementations to the Oxytrichidae and the Urostyloidea.
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Extra resources for Monograph of the Amphisiellidae and Trachelostylidae (Ciliophora, Hypotricha) (Monographiae Biologicae)
The adoral zone of membranelles, the most prominent part of the oral apparatus, extends from the anterior body end along the left body margin to near midline of the cell and usually terminates at about 20–35% of body length. 11 (Berger 2006, p. 18). , Fig. 1a, 74i, k). The anterior, often transversely arranged portion is termed distal, frontal, or collar portion and thus largely on the dorsal side of the frontal scutum, the anteriormost part of the body (Fig. 17g–i); the posterior part of the zone is termed proximal, ventral, or lapel portion.
10 Life Cycle The species reviewed in the present book have, like most other hypotrichs, (very likely) a normal life cycle, that is, the theronts feed, become trophonts and divide, encyst, or conjugate. Literature about the non-morphostatic parts of the life cycle is scarce, as compared to the oxytrichids and urostyloids (for review of these groups, see Berger 1999, 2006). 1 Cell Division The species treated in the current volume divide by isotomic transverse fission, like many other ciliates (for review, see Foissner 1996).
Macronuclear nodules fuse to a single mass during cell division. , Czapik 1981, Raikov 1982, Petz & Foissner 1993, Berger 1999, Foissner et al. 2002, Shao et al. 2007). Consequently this is a rather old plesiomorphy in the last common ancestor of the Hypotricha. The individual division of the many nodules in the Pseudokeronopsinae is an apomorphy for this group (for review, see Berger 2006). Replication band of macronucleus. , Raikov 1982, 1996, Olins & Olins 1994). It is likely the most important morphological apomorphy of the spirotrichs (Lynn 2003).