Topic
Mastax
About: Mastax is a research topic. Over the lifetime, 27 publications have been published within this topic receiving 271 citations.
Papers
TL;DR: The species concept in Rotifers, as in many other animal groups, is applied by various investigations in a rather lax way; there is insufficient insight into the contribution of morphology to reproduce isolation, or to avoidance of interspecific competition.
Abstract: The species concept in Rotifers, as in many other animal groups, is applied by various investigations in a rather lax way. Separation of species is often based on ad hoc criteria, such as the structure of the lorica; there is, as yet, insufficient insight into the contribution of morphology to reproduce isolation, or to avoidance of interspecific competition. An exception is the structure of the mastax; if habitat partitioning through selective feeding is occurring within rotifers, one should indeed expect this structure to show high morphological specificity. However, the same holds true for the corona, which has been little studied, and also for the various receptors found on the head region, and sometimes elsewhere on the body.
34 citations
TL;DR: Scanning electron micrographs have been prepared of mastaxes of more than 120 species of rotifers to illustrate the basic directions of the evolutionary transformation of mastAX sclerites and their significance for reconstructing rotifer phylogeny.
Abstract: Scanning electron micrographs have been prepared of mastaxes of more than 120 species of rotifers The basic directions of the evolutionary transformation of mastax sclerites and their significance for reconstructing rotifer phylogeny are illustrated
32 citations
TL;DR: A new bdelloid rotifer, Abrochtha carnivora n.sp.
Abstract: . Here we describe a new bdelloid rotifer, Abrochtha carnivora n.sp., that preys on other bdelloids and monogonont rotifers. This is the first report of predatory behavior in bdelloids. Despite this extraordinary behavior, A. carnivora displays no major structural deviation from the standard body plan for members of the bdelloid family Philodinavidae: body with head (with ciliated corona), trunk, and foot, mastax with ramate trophi. The finding of such a carnivorous species, unique for the class, appears to contradict the common assumption that the wholly parthenogenetic bdelloids are evolutionary dead-ends.
30 citations
TL;DR: A study of the anterior sensory receptors of male and female Asplanchna brightwelli by scanning electron microscopy reveals some important differences in the region surrounding the mouth.
Abstract: A study of the anterior sensory receptors of male and female Asplanchna brightwelli by scanning electron microscopy reveals some important differences in the region surrounding the mouth. In the male, the ventrolateral sensory bristles, the pseudotrochus, the inner and the outer buccal tufts and the mastax receptors are absent. The oral receptors are reduced.
22 citations
TL;DR: The utility of 3D visualization software is highlighted to gain further insights into the organization and architecture of the rotifer cerebral ganglion and to highlight similarities with other monogonont rotifers.
Abstract: . The nervous system of the benthic freshwater rotifer, Notommata copeus, was examined using antibody probes, epifluorescence and confocal laser scanning microscopy, and digital imaging to highlight similarities with other monogonont rotifers. Immunoreactivity to anti-FMRFamide (Phe–Met–Arg–Phe–NH2), -SCPb (small cardioactive peptide b), and -serotonin (5-HT, 5-hydroxytryptamine) was present in the central, peripheral, and stomatogastric nervous system. Specifically, anti-FMRFamide and -SCPb staining was abundant in perikarya and neurites of the cerebral ganglion, ventrolateral nerve cords, and mastax. In addition, a single loop-like neurite was present in between the nerve cords at the posterior end of the body. Serotonergic neurites were also abundant, and highlighted several cerebral pathways that included connections to the nerve cords and possibly the mastax. Novel neural pathways were also present in the posterior trunk region, where serotonergic neurites innervated the foot and lateral body wall. The results presented herein also highlight the utility of 3D visualization software to gain further insights into the organization and architecture of the rotifer cerebral ganglion.
20 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2012 | 2 |
| 2010 | 2 |
| 2008 | 1 |
| 2007 | 2 |
| 2006 | 1 |
| 2001 | 1 |