Brugerolle, G. ( 1991) Flagellar and cytoskeletal systems in amitochondriate flagellates: Archamoeba, Metamonada and Parabasalia. Protoplasma 164, 70–90.

Chapman, M. Dolan, M. F. & Margulis, L. ( 2000) Centriole–kinetosomes: Form, function and evolution Quart. Rev. Biol. 75, 409-420.

Dacks, J. B. & Redfield, R. ( 1998) Phylogenetic placement of Trichonympha. J. Euk. Microbiol. 45, 445–447.

d'Ambrosio, U., Dolan, M., Wier, A. & Margulis, L. ( 1999) Devescovinid trichomonad with axostyle–based rotary motor (“Rubberneckia”): taxonomic assignment as Caduceia versatilis sp. nov. Europ. J. Protistol. 35, 327–337.

Delgado-Viscogliosi, P., Viscogliosi, E., Gerbod, D., Kuldo, J., Sogin, M. L. & Edgcomb, V. ( 2000) Molecular phylogeny of Parabasalids based on small subunit rRNA sequences, with emphasis on the Trichomonadinae subfamily. J. Euk. Microbiol. 47, 70–75.

Dolan, M. F., d'Ambrosio, U., Wier, A. & Margulis, L. ( 2000) Surface kinetosomes and disconnected nuclei of a calonymphid: ultrastructure and evolutionary significance of Snyderella tabogae. Acta Protozool. 39, 135–141.

Dubinina, G. A., Leshcheva, N. V. & Grabovich, M. Yu. ( 1993a) The colorless sulfur bacterium Thiodendron is actually a symbiotic association of spirochetes and sulfidogens Mikrobiologiya 62, 717–732 (translated, Plenum Publ., pp. 432–444)

Dubinina, G. A., Grabovich, M. Yu. & Lesheva, N. V. ( 1993b) Occurrence, structure and metabolic activity of “Thiodendron” sulfur mats in various saltwater environments. Mikrobiologiya 62, 740–750 (translated, Plenum Publ., pp. 450–456)

Dyer, B. ( 1990) Phylum Zoomastigina Class Parabasalia. In Handbook of Protoctista, eds. Margulis, L., Corliss, J. O., Melkonian, M. & Chapman, D. J. (Jones and Bartlett. Boston), pp. 252–258.

Edgcomb, V., Viscogliosi, E., Simpson, A. G. B., Delgado-Viscogliosi, P., Roger, A. J. & Sogin, M. L. ( 1998) New insights into the phylogeny of trichomonads inferred from small subunit rRNA sequences. Protist 149, 359–366.

Foissner, W. Blatterer, H. & Foissner, I. ( 1988) The Hemimastigophora (Hemimastix amphikineta nov. gen., nov. sp.), a new protistan phylum from Gondwanian soils Europ. J. Protistol. 23, 361–383.

Foissner, W. & Foissner, I. ( 1993) Revision of the Family Spironemidae Doflein (Protista, Hemimastigophora), with description of two new species, Spironema terricola, nov. sp. and Stereonema geiseri nov. gen., nov. sp. J. Euk. Microbiol. 40, 422–438.

Fuerst. J. A. & Webb, R. I. ( 1991) Membrane–bounded nucleoid in the eubacterium Gemmata obscuriglobus. Proc. Natl. Acad. Sci. USA 88, 8184–8188.

Germont, A., Philippe, H. & Le Guyader, H. ( 1996) Presence of a mitochondrial–type 70K Da heat shock protein in Trichomonas vaginalis suggest a very early mitochondrial endosymbiosis in eukaryotes. Proc. Natl. Acad. Sci. USA 93, 14614–14617.

Golding, G. B. & Gupta, R. S. ( 1995) Protein–based phylogenies support a chimeric origin for the eukaryotic genome Molec. Biol. Evol. 12, 1–6.

Gupta, R. S. ( 1998a) Protein phylogenies and signature sequences: A reappraisal of evolutionary relationships among archaebacteria, eubacteria and eukaryotes. Microbiol. Molec. Biol. Rev. 62, 1435–1491.

Gupta, R. S. ( 1998b) What are archaebacteria: life's third domain or monoderm prokaryotes related to Gram–positive bacteria? A new proposal for the classification of prokaryotic organisms. Molec. Microbiol. 29, 695–708.

Gupta, R. S. ( 1998c) Life's third domain (Archaea): an established fact or an endangered paradigm? A new proposal for classification of organisms based on protein sequences and cell structure. Theor. Popul. Biol. 54, 91–104.