Morphologie und Morphogenese des Bodenciliaten Oxytricha granulifera sp.n. (CiIiophora, Oxytrichidae)

Abstract

Oxytricha granulifera sp.n. differs from other members of the genus by its subpellicular granules and the strongly shortened dorsal kinety 4. The overall pattern of the morphogenetic events is similar to that known from other Oxytrichidae. However, the oral primordium evolves de novo between the left marginal cirral row and the postoral cirri. The six anlagen of the frontoventral cirri are of different origin. Two anlagen of the proter evolve from parental frontal cirri, two from the opisthe, and one includes basal bodies of the proter and opisthe. Two anlagen of the opisthe evolve from the oral primordium, and three primordia originate from the postoral cirri. Frontal cirrus 1 evolves from the paroral membrane in the proter, and from the oral primordium and the anlagen of the frontoventral cirri in the opisthe. The genus Oxytricha can be subdivided into several groups with regard to the origin of its oral primordium and the development of the frontoventral cirri. The morphogenesis of the dorsal kineties in the Hypotrichida is reviewed. Seven different modes of origin are distinguished. We conclude that morphogenetic features cannot be used in the classification of the Hypotrichida at the generic level, because we have too little information to decide whether special morphogenetic features are important at the generic or species level.

Systematics and species-specific response to pH of Oxytricha acidotolerans sp. nov. and Urosomoida sp. (Ciliophora, Hypotricha) from acid mining lakes

“…1e, h, i), whereas it is very conspicuous in Oxytricha granulifera , type of Oxytricha and the oxytrichids (e.g. Foissner and Adam 1983). This lack of clarity in O. acidotolerans is reminiscent of O. africana , O. elegans , and O. opisthomuscorum where the posterior end of kinety 3 and the anterior end of kinety 4 are also only indistinctly separated (Figs 14d, 15c, f in Foissner 1999; Figs 48–51 in Petz and Foissner 1997).…”

Phylogeny of the Stichotrichia (Ciliophora; Spirotrichea) Reconstructed with Nuclear Small Subunit rRNA Gene Sequences: Discrepancies and Accordances with Morphological Data

“…The origin of strains and source of DNA were as follows: (1) O. longigranulosa —originally isolated and identified by W. Foissner; genomic DNA provided by M. Schlegel; (2) O. elegans —isolated from soil from the margin of a Mangrove forest in the Dominican Republic and identified by W. Foissner; (3) O. lanceolata —isolated from soil of Namibia (cf. Foissner, Agatha, and Berger 2002) and identified by W. Foissner; (4) O. granulifera (2)—isolated from the Neuhaus pond in the surroundings of Salzburg City, Austria and identified by W. Foissner; (5) O. granulifera (3)—isolated from a pond in the village of Michelbeuern, Salzburg, about 50 km away from the Neuhaus pond mentioned above and identified by W. Foissner; (6) O. granulifera (4)—isolated from slightly saline soil from the north coast of Venezuela, Morrocoy National Park, surroundings of the village of Chichiriviche and identified by W. Foissner; (7/8) O. granulifera (SK2; SK3)—subclonal cultures of O. granulifera from soil in Baumgarten, Austria (type locality; Foissner and Adam 1983) and originally identified by W. Foissner; genomic DNA provided by M. Schlegel; (9) A. magnigranulosa —isolated from dune soil in the surroundings of Nijmegen, the Netherlands, and identified by W. Foissner; (10) O. flexilis —isolated from Neuhaus pond in the surroundings of Salzburg City, Austria, and identified by W. Foissner; and (11) P. franzi —isolated from a pond at foot of Pöstlingberg, Linz, Upper Austria, and identified by W. Foissner. Family assignment of these species following Lynn (2003b) is shown in Table 1.…”

“… Schematic drawing of the oxytrichid Oxytricha granulifera ( A ) and the urostylid Uroleptus lepisma ( B ) Like typical oxytrichids, O. granulifera has the 18 fronto‐ventral‐transverse (FVT) cirral pattern, while the urostylids possess the so‐called midventral row (MVR) composed of zigzagging cirri. Drawings are based on Foissner and Adam (1983) and Berger and Foissner (1989). …”

A New Subspecies of Oxytricha granulifera (Hypotrichia: Oxytrichidae) from Mexico, with Notes on its Morphogenesis and Phylogenetic Position

“…Oxytricha granulifera chiapasensis n. subsp. is highly similar to the nominotypical subspecies O. granulifera granulifera Foissner and Adam , but differs based on the following characters: (i) undulating membranes in a Stylonychia –pattern vs. an Oxytricha ‐pattern, (ii) six dorsal kineties vs. five, (iii) fewer adoral membranelles (22–29 vs. 29–32), (iv) low numbers of left marginal cirri (21–30 vs. 27–40) and right marginal cirri (21–31 vs. 29–41), and (v) the habitat (freshwater vs. terrestrial).…”