DSpace

King Saud University Repository >
King Saud University >
COLLEGES >
Science Colleges >
College of Science >
College of Science >

Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/11228

Title: Phylogeny of six oligohymenophoreans (Protozoa, Ciliophora) inferred from small subunit rRNA gene sequences.
Authors: A., , K. A. S Al-Rasheid
Al-Khedhairy, A. A
Al-Arifi, S.
Keywords: oligohymenophorean
oligohymenophorean,
gene sequences
rRNA,
Issue Date: 2009
Publisher: Zoologica Scripta. NORWAY.
Citation: 38: 323-331.
Abstract: The small subunit rRNA (SSrRNA) genes of six marine oligohymenophoreans, namely Uronemella filificum Schizocalyptra sp.-WYG07060701, Schizocalyptra aeschtae Pleuronema Sinica P. czapikae and Paratetrahymenasp., were sequenced. Phylogenetic trees were constructed with four different methods to assess the inter- and intrageneric relationships among the scuticociliates and the phylogenetic assignment of the order Loxocephalida. The SSrRNA phylogeny indicates that: (i) Paratetrahymena is most closely related to Cardiostomatella (ii) the order Loxocephalida and the family Uronematidae both appear to be polyphyletic; (iii) the order Philasterida is a well-defined taxon; (iv) Cyclidium porcatum falls outside the order Pleuronematida in all analyses; (v) the validity of the genus Uronemella is confirmed; (vi) Schizocalyptra is a member of the family Pleuronematidae. Furthermore, the predicted secondary structures of the variable region 4 of the SSrRNA gene sequences show that the size of the terminal bulge in Helix E23–7 is probably different for the orders Philasterida and Pleuronematida. Also, compared to Uronema and Homalogastra Uronemella has distinct patterns in Helices E23–1, E23–7, E23–8 and E23–9.
URI: http://hdl.handle.net/123456789/11228
Appears in Collections:College of Science

Files in This Item:

File Description SizeFormat
48.docx13.05 kBMicrosoft Word XMLView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

DSpace Software Copyright © 2002-2007 MIT and Hewlett-Packard - Feedback