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Flectacineta (Ciliophora: Suctoria) from Egypt: New records and new species

T. I. S. MOAWAD
 

Abstract

Four suctorian species of the genus Flectacineta Jankowski, 1978 are reported. They are epibionts of the marine filamentous green alga Cladophora sp. Algal samples were collected from the shore of the Mediterranean Sea at Port-Said. Two of these species are new: F. multimicronucleata n. sp. characterized by the presence of more than one micronucleus and F. amicronucleata n. sp. characterized by having no micronucleus, the upper side of the cell body looking like a curb roof, giving the impression of being made of two plates meeting at the midline at an angle. The diagnosis of F. multimicronucleata n. sp. And F. amicronucleata n. sp. as new species was confirmed by using three multivariate statistical analyses methods (namely multivariate analysis of variance (MANOVA), two-step cluster analysis and discriminant analysis (DA)). A new biogeographical/ecological morphotype is recognized: F. elegans egyptica, distinguished from F. elegans by having a centrally located rounded macronucleus and a simple junction between the lorica and the stalk; with no joint. The centrally located macronucleus of Flectacineta elegans (Imhoff, 1883), Curds, 1987 is ovoid in shape and its hollow stem region is distinct and joins the lorica via an intervening ball-like joint. New data are reported for the type species of the genus, F. livadiana (Mereschkowsky, 1881) Jankowski, 1978. A key to the species of the genus Flectacineta Jankowski, 1978 is provided.

Keywords: Morphology, taxonomy, epibiosis, ciliates, suctoria






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