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Trichostome ciliates from Australian marsupials. I. Bandia gen. nov. (Litostomatea: Amylovoracidae)

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A new genus of amylovoracid ciliates, Bandia gen.nov., is described. They are endosymbiotic/endocommensal in the stomachs of macropodid marsupials. Six new species, B. beveridgei, B. equimontanensis, B. tammar, B. deveneyi, B. cribbi and B. smalesae, are described from Setonix brachyurus, Petrogale assimilis, Macropus eugenii, M. robustus, M. parryi and M. agilis respectively. The gross morphology of Bandia is similar to that of Bitricha, with holotrichous somatic ciliation in two fields, longitudinal dorsal and oblique ventral. The somatic kineties are arranged in groups between non-ciliated major interkinetal ridges; the groups of kineties thus give the cell a banded appearance. Several species are bimorphic, one form holotrichous and the other with a glabrous right body groove which appears to be derived from an ingrowth of one of the major interkinetal ridges. The groove may function in attachment either in sequestration or conjugation. The ultrastructure of the somatic kineties and the oral structures is similar to that of Amylovorax. Bandia also has unique ultrastructural features associated with the major interkinetal ridges, right body groove and a karyophore. Morphological evolution within the Amylovoracidae may have proceeded from simple forms such as Amylovorax via a process of cellular torsion and/or oral migration to forms similar to Bitricha and by further torsion and cellular elaboration to Bandia.
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Keywords: Amylovoracidae; Bandia nov. gen.; Ciliophora; Endocommensals; Macropodidae; Trichostomatia

Document Type: Original Article

Affiliations: Department of Microbiology & Parasitology, The University of Queensland, Brisbane 4072, Queensland, Australia; Fax: ++61 73365 4620; E-mail: s.cameron@mailbox.uq.edu.au

Publication date: 2002-12-01

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