18S rDNA sequences

Moon-van da Staay, S.Y. De Wachta, R. Vaulot, D. (2001) Oceanic 18S rDNA sequences from picoplankton reveal unsuspeaed eukaryotic diversity. Nature, 409, 607-10. 

Giribet, G., Distel, D.L., Polz, M., Sterrer, W. and Wheeler, W.C. (2000) Triploblastic relationships with emphasis on the acoelomates and the position of Gnathostomulida, Cycliophora, Plathelminthes, and Chaetognatha a combined approach of 18S rDNA sequences and morphology. Systematic Biology 49, 539. 

Fell [202] extensively discuss the problem of using Saccharomycetales instead of the older order Endomycetales. The order Dipodascales was already introduced by Batra [204], However, based on molecular characteristics, many genera suggested by Batra cannot be included into this order. Additional complete 18S rDNA sequences are necessary to corroborate the orders Dipodascales, Lipomycetales and Stephanoascales [203],... 

Interestingly, the cleistothecial powdery mildew Blumeria graminis (fig. 3 Erysiphales) clusters with Sclerotinia sclerotiorum [319]. Additional complete 18S rDNA sequences of powdery mildew fungi are necessary to clarify the phylogenetic relationship between Erisyphales and Leotiales. It is, however, remarkable that many representatives of the Leotiales have asci with thick-walled apices [Oberwinkler, pers. commun.]. 

C. laurentii is an additional species of clinical importance (pulmonary abscess) which belongs to the Tremellales [24, 80, 262, 381]. Based on partial 26S rDNA and complete 18S rDNA sequences, the genus Cryptococcus is polyphyletic and occurs in at least five different clades of the Tremellales, and within the Cystofilobasidiales [24, 381] (fig. 4). 

Suh S-O, NakaseT Phylogenetic analysis of the ballistosporous anamorphic genera Udenomyces and Bullera, and related basidiomycetous yeasts, based on 18S rDNA sequence. Microbiology 1995 141 901-906. 

Landvik S, Eriksson OE, Gargas A, Gustafsson P Relationships of the genus Neolecta (Neolectales ordo nov.) inferred from 18S rDNA sequences. Systema Ascomycetum 1993 11 107-118. 

Sjamsuridzal W, Nishida H, Ogawa H, Kakishima M, Sugiyama J Phylogenetic positions of mst fimgi parasitic on ferns Evidence from 18S rDNA sequence analysis. Mycoscience 1999 40 21-27. 

Campbell, B.C. et al.. Evolutionary origin of whiteflies (Hemiptera Stemorrhyncha Aleyrodidae) inferred from 18S rDNA sequences, Insect Mol. Biol. 3, 73, 1994. 

Oldach, D.W. et al.. Heteroduplex mobility assay-guided sequence discovery elucidation of the small subunit (18S) rDNA sequences of Pfiesteria piscicida and related dinoflagellates from complex algal culture and environmental sample DNA pools, Proc. Natl. Acad. Sci. USA 97, 4303, 2000. 

This paper reports 18S rDNA sequence results from some new taxa, describes some important corrections to the 18S tree, and outlines new results from the analysis of mitochondrial DNA sequence divergence in Terebratulina spp. and other cancellothyridids (Liiter and Cohen, submitted). 

Halanych, K.M. (1995) The phylogenetic position of the pterobranch hemichordates based on 18S rDNA sequence data . Molecular Phylogenetics and Evolution, 4, 72-6. 

Mallatt, J. and Sullivan, J. (1998) 28S and 18S rDNA sequences support the monophyly of lampreys and hagfishes . Molecular Biology and Evolution, 15, 1706-18. 

Contrary to what I believed formerly, it is likely on molecular grounds (codon assignment in mitochondrial DNA and comparison of 18S rDNA sequences) that the hemichordates are sister group to the echinoderms and that the Ambulacraria (=echinoderms-i-hemichordates), rather than the echinoderms only, are sister group to the chordates. 

Bernston, E.A., France, S.C., and MuHmeaux, LS. (1999) Phylogenetic relationships with the Class Anthozoa (Phylum Cnidaria) based on 18S rDNA sequences. Mol. Phyl. Evol, 13, 417—433. 

Bleidorn, C., Vogt L, and Bartolomaeus, T. (2003) New insights into polychaete phylogeny (Armehda) inferred from 18S rDNA sequences. Mol. Phyl. Evol., 29,279-288. 

---