Revision des Geléiides (Ciliophora, Karyorelictea)

Linz

1999

90 S.

280 Abb., zahlr. Lit. Ang.

Bandaufführung

10627

58824

Geleiids, fairly common mesopsammic ciliates, have been discovered late, viz. by Kahl in 1933. For more than 40 years, their infraciliature remained unknown. From 1975 to 1986, some progress has been made in the knowledge of the oral ciliature of a few species. Only since 1994 I was able to study the infraciliature of eight species and thus it was possible to revise the entire subclass Protoheterotrichia NOUZAREDE 1977. Diagnoses of the family Geleiidae and of the genus Geleia are revised and improved. Six species of this genus are analysed or even completely redescribed: Geleia simplex (Faure-Fremiet 1951), G. decolor (KAHL 1933), G. major (Dragesco 1954), G. nigriceps (KAHL 1933), G. fossata (KAHL 1933) and G. swedmarki (DRAGESCO 1954). The new genus Gellertia is characterized by a simplified adoral infraciliature, which is reduced to a row of two dikinetids (instead of the long polykineties of Geleia). The type species Gellertia heterotricha (Dragesco 1960) nov. comb, is described in detail. The new family Aveliidae is proposed embracing gigantic, cylindrical (vermiform) ciliates of which the oral infraciliature is characterized by the invariable presence of two paroral structures: an intrabuccal kinety and a series of polykineties bordering the buccal opening. Based on the different structure of the buccal infraciliature two genera are characterised: Avelia NOUZAREDE 1977 and the new genus Parduczia. The diagnosis of the genus Avelia is impoved and three species are described: Avelia multinucleata nov. sp., A. gigas (DRAGESCO 1954) and A. martinicense (NOUZAREDE 1975). The Parduczia species are giant, filiform ciliates with a very long buccal split. The adoral infraciliature shows four kineties: one intrabuccal and three peribuccal ones. Several species are redescribed in detail: Parduczia orbis (Faure-Fremiet 1950) nov. comb., P. murmanica (Raikov 1962) nov. comb., P. filiformis (NOUZAREDE 1977) nov. comb., P. martinicense (NOUZAREDE 1977) nov. comb, and P. arcachonense (NOUZAREDE 1965) nov. comb. Finally, the alpha-taxonomy of all geleiids is analysed as well as some data concerning their cytology. The systematic position of the geleiids in the class Karyorelictea and in the phylum Ciliophora is discussed (in correlation with some aspects of the mesopsammic invertebrate microfauna).