Pleurotricha curdsi (Shi, Warren and Song 2002) nov. comb. (Ciliophora Hypotrichida) morphology and ontogenesis of an Indian population; redefinition of the genus》.pdf
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Pleurotricha curdsi (Shi, Warren and Song 2002) nov. comb. (Ciliophora Hypotrichida) morphology and ontogenesis of an Indian population; redefinition of the genus》.pdf
Europ. J. Protistol. 39, 275–285 (2003)
© Urban Fischer Verlag
http://www.urbanfischer.de/journals/ejp
Pleurotricha curdsi (Shi, Warren and Song 2002) nov. comb.
(Ciliophora: Hypotrichida): morphology and ontogenesis
of an Indian population; redefinition of the genus
1, 2 1 1
Renu Gupta *, Komal Kamra , Seema Arora and G. R. Sapra
1 Department of Zoology, University of Delhi, Delhi-110007, India; E-mail: r17gupta@
2 Department of Zoology, SGTB Khalsa College, University of Delhi, Delhi-110007, India
Received: 23 April 2003; 4 June 2003. Accepted: 11 June 2003
The oxytrichid ciliate Pleurotricha curdsi (140 × 64 µm) is widely distributed in the tributaries of the river
Yamuna in Delhi. The vegetative ciliature consists of 20 frontal-ventral-transverse (FVT) cirri (9 frontal, 6
ventral and 5 transverse), two rows of right marginal cirri (RMC) and one row of left marginal cirri, four
dorsal kineties, two dorsomarginal rows and three caudal cirri (CC), as well as the usual adoral zone of
membranelles and two undulating membranes.A morphometric comparison between the Indian and Chi-
nese populations of P. curdsi shows significant strain differences. On the basis of its morphological and
morphogenetic features P. curdsi qualifies to be an oxytrichid sensu stricto. However, the presence of 20
FVT cirri in this species is a non-conforming feature as all other members of this group have been report-
ed to possess 18 or 18 FVT cirri. The FVT cirri are formed ontogenetically from 6 FVT primordia, which
involve 5 parental cirri as in the Stylonychia (= Tetmemena) pustulata-vorax (= bifaria) pattern. The two
RMC rows are formed from a single primordium that arises in the outer parental RMC row and later splits
into two. Morphogenetic study shows unequivocally the presence of three CC which are formed typically
at the posterior ends of dorsal kineties 1, 2 an
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