Abstract
Today, students of zoology will find a large number of incompatible dendrograms of the major groups of metazoans in textbooks and articles (examples in Figs. 1 and 2) inferred from rDNA alignments. Discrepancies existed before molecular data were used: a long debate, for example, was the discussion on the monophyly of arthropods. S. Manton (1902–1979) advocated her hypotheses of polyphyly of arthropods on the basis of excellent morphological studies (e.g. Manton 1969, 1973) and it took many years of research, partly with new methods (e.g. Wheeler et al. 1993), until the majority of the scientific community accepted what was already well-founded decades before (e.g. Snodgrass 1950), namely that arthropods are with high probability monophyletic. The major source of uncertainty in comparative morphology is the lack of scientific concepts that allow a quantitative estimation of the quality (= information content) of characters and data sets. Only recently has the first author proposed that the terms “information content” and “data quality” are related to the probability of homology of the characters (Wägele 1996b).
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References
Abele LG, Kim W, Felgenhauer BE (1989) Molecular evidence for inclusion of the phylum Pentastomida in the Crustacea. Mol Biol Evol 6: 685–691
Adoutte A, Philippe H (1993) The major lines of metazoan evolution: summary of traditional evidence and lessons from ribosomal RNA sequence analysis. In: Pichon Y (ed) Comparative molecular neurobiology. Birkhäuser, Basel, pp 1–30
Ahlrichs WH (1995) Ultrastruktur und Phylogenie von Seison nebaliae (Grube 1859) und Seison annulatus (Claus 1876 ) Hypothesen zu phylogenetischen Verwandtschaftsverhältnissen innerhalb der Bilateria. Cuvillier, Göttingen
Ahlrichs WH (1997) Epidermal ultrastructure of Seison nebaliae and Seison annulatus, and a comparison of epidermal structures within the Gnathifera. Zoomorphology 117: 41–48
Ax P (1995) Das System der Metazoa I. Fischer, Stuttgart
Ballard J WO, Olsen GJ, Faith DP, Odgers WA, Rowell DM, Atkinson PW (1992) Evidence from 12S ribosomal RNA sequences that onychophorans are modified arthropods. Science 258: 1345–1348
Bartolomaeus T (1994) Ultrastruktur und Entwicklung der Uncini und deren Bedeutung für die Systematik der Anneliden. Verh Dtsch Zool Ges 87: 215
Bartolomaeus T (1995) Structure and formation of the uncini in Pectinaria koreni, Pectinaria auricoma (Terebellida) and Spirorbis spirorbis (Sabellida): implications for annelid phylogeny and the position of the Pogonophora. Zoomorphology 115: 161–177
Baverstock PR, Fielke R, Johnson AM, Bray RA, Beveridge I (1991) Conflicting phylogenetic hypotheses for the parasitic platyhelminths tested by partial sequencing of 18S ribosomal RNA. Int J Parasitol 21: 329–339
Boore JL, Brown WM (1994) Mitochondrial genomes and the phylogeny of molluscs. Nautilus Suppl 2: 61–78
Boore JL, Collins TM, Stanton D, Daehler LL, Brown WM (1995) Deducing the pattern of arthropod phylogeny from mitochondrial DNA rearrangements. Nature 376: 163–165
Brown DD, Wensink PC, Jordan E (1972) A comparison of the ribosomal DNAs of Xenopus laevis and Xenopus mulleri: evolution of tandem genes. J Mol Biol 63: 57–73
Brown WM, George M, Wilson AC (1979) Rapid evolution of animal mitochondrial DNA. Proc Natl Acad Sci USA 76: 1967–1971
Brusca RC, Brusca GJ (1990) Invertebrates. Sinauer, Sunderland, MA
Carmean D, Kimsey LS, Berbee ML (1992) 18S rDNA sequences and the holometabolous insects. Mol Phylog Evol 1:270–278
Cavalier-Smith T, Allsopp MTEP, Chao EE, Boury-Esnault N, Vacelet J (1996) Sponge phylogeny, animal monophyly, and the origin of the nervous system: 18S rRNA evidence. Can J Zool 74: 2031–2045
Charleston MA, Page M (1997) Spectrum. Computer program for spectral analysis, available at http://taxonomy.zoology.gla.ac.uk/~mac/spectrum/spectrum.html
Christen R, Ratto A, Baroin A, Perasso R, Grell KG, Adoutte A (1991) An analysis of the origin of metazoans, using comparisons of partial sequences of the 28S RNA, reveals an early emergence of triploblasts. EMBO J 10: 499–503
Clary DO, Wolstenholme DR (1985) The mitochondrial DNA molecule of Drosophila yakuba: nucleotide sequence, gene organization, and genetic code. J Mol Evol 22: 252–271
Coen ES, Thoday JM, Dover G (1982) Rate of turnover of structural variants in the rDNA gene family of Drosophila melanogaster. Nature 295: 564–568
Crease TJ (1993) Sequence of the intergenic spacer between the 28S and 18S rRNA-encoding genes of the crustacean, Daphnia pulex. Gene 134: 245–249
Crease TJ (1995) Ribosomal DNA evolution at the population level: nucleotide variation in intergenic spacer arrays of Daphnia pulex. Genetics 141: 1327–1337
Darling KF, Kroon D, Wade CM, Brown AJL (1996) Molecular phylogeny of the planktic Foraminifera. J Foraminiferal Res 26: 324–330
Darling KF, Wade CM, Kroon D, Brown AJL (1997) Planktic foraminiferal moleuclar evolution and their polyphyletic origins from benthic taxa. Mar Micropaleontol 30: 251–266
De Rijk P, Van de Peer Y, Van den Broeck I, De Wachter R (1995) Evolution according to large ribosomal subunit RNA. J Mol Evol 41: 366–375
De Rijk P, Van de Peer Y, De Wachter R (1996) Database on the structure of large ribosomal subunit RNA. Nucleic Acids Res 24: 92–97
Degnan BM, Yan J, Hawkins CJ, Lavin MF (1990) rRNA genes from the lower chordate Herdmania momus: structural similarity with higher eukaryotes. Nucleic Acids Res 18:7063–7070
Derr JN, Davis SK, Woolley JB, Wharton RA (1992) Variation and the phylogenetic utility of the large ribosomal subunit of mitochondrial DNA from the insect order Hymenoptera. Mol Phylogen Evol 1: 136–147
DeSalle R (1992) The phylogenetic relationships of flies in the family Drosophilidae deduced from mtDNA sequences. Mol Phylog Evol 1: 31–40
DeSalle R, Freedman T, Prager EM, Wilson AC (1987) Tempo and mode of sequence evolution in mitochondrial DNA of Hawaiian Drosophila. J Mol Evol 26: 157–164
Drouin G, Moniz de Sá M (1995) The concerted evolution of 5S ribosomal genes linked to the repeat units of other multigene families. Mol Biol Evol 12: 481–493
Drouin G, Sévigny JM, McLaren IA, Hofman JD, Doolittle WF (1992) Variable arrangements of 5S ribosomal genes within the ribosomal DNA repeats of arthropods. Mol Biol Evol 9: 826–835
Ehlers U (1985) Das phylogenetische System der Plathelminthes. Fischer, Stuttgart
Elder JF, Turner BJ (1995) Concerted evolution of repetitive DNA sequences in eukaryotes. Q Rev Biol 70: 297–320
Field KG, Olsen GJ, Lane DJ (1988) Molecular phylogeny of the animal kingdom. Science 239: 748–752
Fox RC, Meng J (1997) An X-radiographic and SEM study of the osseous inner ear of multituberculates and monotremes (Mammalia): implications for mammalian phylogeny and evolution of hearing. Zool J Linn Soc 121: 249–291
Friedrich M, Tautz D (1995) Ribosomal DNA phylogeny of the major extant classes and the evolution of myriapods. Nature 376: 165–167
Garey JR, Near TJ, Nonnemacher MR, Nadler SA (1996) Molecular evidence for Acanthocephala as a subtaxon of Rotifera. J Mol Evol 43: 287–292
Ghiselin MT (1988) The origin of molluscs in the light of molecular evidence. Oxford Surv Evol Biol 5: 66–95
Ghiselin MT (1989) Summary of our present knowledge of metazoan phylogeny. In: Fernholm B, Bremer K, Jörnwall H (eds) The hierarchy of life. Excerpta Medica, Amsterdam, pp 261–272
Giribet G, Garranza S, Baguña J, Riutort M, Ribera C (1996) First molecular evidence for the existence of a Tardigrada + Arthropoda clade. Mol Biol Evol 13: 76–84
Halanych KM (1991) 5S ribosomal RNA sequences inappropriate for phylogenetic reconstruction. Mol Biol Evol 8:249–253
Halanych KM (1996) Testing hypotheses of chaetognath origins: long branches revealed by 18S ribosomal DNA. Syst Biol 45: 223–246
Halanych KM, Bacheller JD, Aguinaldo AMA, Liva SM, Hillis DM, Lake JA (1995) Evidence from 18S ribosomal DNA that the lophophorates are protostome animals. Science 267: 1641–1643
Hanelt B, Van Schyndel D, Adema CM, Lewis LA, Loker ES (1996) The phylogenetic position of Rhopalura ophiocomae (Orthonectida) based on 18S ribosomal sequence analysis. Mol Biol Evol 13: 1187–1191
Hedges SB (1994) Molecular evidence for the origin of birds. Proc Natl Acad Sci USA 91: 2621–2624
Hedges SB, Moberg KD, Maxson LR (1990) Tetrapod phylogeny inferred from 18S and 28S ribosomal RNA sequences and a review of the evidence for amniote relationships. Mol Biol Evol 7: 607–633
Hendriks L, Huysmans E, Vandenberghe A, De Wächter R (1986) Primary structures of the 5S ribosomal RNAs of 11 arthropods and applicability of 5S RNA to the study of metazoan evolution. J Mol Evol 24: 103–109
Hendriks L, De Baere R, Van Broeckhoven C, De Wächter R (1988) Primary and secondary structure of the 18S ribosomal RNA of the insect species Tenebrio molitor. FEBs Lett 232: 115–120
Hendy MD, Penny D (1993) Spectral analysis of phylogenetic data. J Classif 10: 5–24
Hillis DM, Davis SK (1986) Evolution of ribosomal DNA: fifty million years of recorded history in the frog genus Rana. Evolution 40: 1275–1288
Hillis DM, Davis SK (1988) Ribosomal DNA: intraspecific polymorphism, concerted evolution, and phylogeny reconstruction. Syst Zool 37: 63–66
Holland PWH, Hacker AM, Williams NA (1991) A molecular analysis of the phylogenetic affinities of Saccoglossus cambrensis Brambell & Cole ( Hemichordata ). Philos Trans R Soc Lond [Biol] 332: 185–189
Janke A, Gemmell NJ, Feldmaier-Fuchs G, von Haeseler A, Pääbo S (1996) The mitochondrial genome of a monotreme — the platypus ( Ornithorhynchus anatinus ). J Mol Evol 42: 153–159
Katayama T, Wada H, Furuya H, Satoh N, Yamamoto M (1995) Phylogenetic position of the dicyemid Mesozoa inferred from 18S rDNA sequences. Biol Bull 189: 81–90
Katayama T, Nishioka M, Yamamoto M (1996) Phylogenetic relationships among turbellarian orders inferred from 18S rDNA sequences. Zool Sci 13: 747–756
Kim CB, Moon SY, Gelder SR, Kim W (1996) Phylogenetic relationship of annelids, molluscs, and arthropods evidenced from molecules and morphology. Mol Evol 43: 207–215
Kobayashi M, Takahashi M, Wada H, Satoh N (1993) Molecular phylogeny inferred from sequences of small subunit ribosomal DNA, supports the monophyly of the Metazoa. Zool Sci 10: 827–833
Kwon O, Ogino K, Ishikawa H (1991) The longest 18S ribosomal RNA ever known. Eur J Biochem 202: 827–833
Lake JA (1987) A rate-independent technique for analysis of nucleic acid sequences: evolutionary parsimony. Mol Biol Evol 4: 167–191
Lake JA (1990) Origin of the Metazoa. Proc Natl Acad Sci USA 87: 763–766
Larsen N, Olsen GJ, Maidak BL, McCaughey MJ, Overbeek R, Macke TJ, Marsh TL, Woese C (1993) The ribosomal database project. Nucleic Acids Res 21: 3021–3023
Lé HLV, Lecointre G, Perasso R (1993) A 28S rRNA-based phylogeny of the gnathostomes: first steps in the analysis of conflict and congruence with morphologically based cladograms. Mol Phylog Evol 2: 31–51
Lecointre G (1996) Methodological aspects of molecular phylogeny of fishes. Zool Stud 35: 161–177
Lecointre G, Philippe H, Le HLV, Le Guyader H (1993) Species sampling has a major impact on phylogenetic inference. Mol Phylog Evol 2: 205–224
Lecointre G, Philippe H, Van Le HL, Le Guyader H (1994) How many nucleotides are required to resolve a phylogenetic problem? The use of a new statistical method applicable to available sequences. Mol Phylog Evol 3: 292–309
Lee WJ, Kocher TD (1995) Complete sequence of a sea lamprey (Petromyzon marinus) mitochondrial genome: early establishment of the vertebrate genome organization. Genetics 139: 873–887
Lento GM, Hickson RE, Chambers GK, Penny D (1995) Use of spectral analysis to test hypotheses on the origin of pinnipeds. Mol Biol Evol 12: 28–52
Luckett WP, Zeller U (1989) Developmental evidence for dental homologies in the monotreme Ornithorhynchus and its systematic implications. Z Sāugetierk 54: 193–204
Mackey LY, Winnepenninckx B, De Wachter R, Backeljau T, Emschermann P, Garey JR (1996) 18S rRNA suggests that Entoprocta are protostomes, unrelated to Ectoprocta. J Mol Evol 42:552–559
Maidak BL, Olsen GJ, Larsen N, Overbeek R, McCoughey MJ, Woese CR (1996) The ribosomal database project ( RDP ). Nucleic Acids Res 24: 82–85
Manton SM (1969) Evolution and affinities of Onychophora, Myriapoda, Hexapoda, and Crustacea. In: Moore RC (ed) Treatise on invertebrate paleontology, part R: Arthropoda, vol 4. Geological Society of America University of Kansas, pp R15–R57
Manton SM (1973) Arthropod phylogeny - a modern synthesis. J Zool Lond 171: 111–130
Marshall CR (1992) Substitution bias, weighted parsimony, and amniote phylogeny as inferred from 18S rRNA sequences. Mol Biol Evol 9: 370–373
Michot B, Qu LH, Bachellerie JP (1990) Evolution of large-subunit rRNA structure. Eur J Biochem 188: 219–229
Moon SY, Kim W (1996) Phylogenetic position of the Tardigrada based on the 18S ribosomal RNA gene sequences. Zool J Linn Soc 116: 61–69
Neuhaus B (1994) Ultrastructure of alimentary canal and body cavity, ground pattern, and phylogenetic relationship of the Kinorhyncha. Microfauna Mar 9: 61–157
Nunn GB, Theisen BF, Christensen B, Arctander P (1996) Simplicity-correlated size growth of the nuclear 28S ribosomal RNA D3 expansion segment in the crustacean order Isopoda. J Mol Evol 42: 211–223
Odorico DM, Miller DJ (1997) Internal and external relationships of the Cnidaria: implications of primary and predicted secondary structure of the 5′-end of the 23S-like rDNA. Proc R Soc Lond [Biol] 264: 77–82
Ortí G, Petry P, Porto JIR, Jegú M, Meyer A (1996) Patterns of nucleotide change in mitochondrial ribosomal RNA genes and the phylogeny of piranhas. J Mol Evol 42: 169–182
Pashley DP, McPheron BA, Zimmer EA (1993) Systematics of holometabolous insect orders based on 18S ribosomal RNA. Mol Phylog Evol 2: 132–142
Pawlowski J, Montoya-Burgos JI, Fahrni JF, Wüest J, Zaninetti L (1996) Origin of the Mesozoa inferred from 18S rRNA gene sequences. Mol Biol Evol 13: 1128–1132
Philippe H, Chenuil A, Adoutte A (1994) Can the Cambria explosion be inferred through molecular phylogeny? Development (Suppl): 15–25
Schäfer M, Kunz W (1985) rDNA in Locusta migratoria is very variable: two introns and extensive restriction site polymorphisms in the spacer. Nature 13:1251–522
Schlötterer C, Hauser MT, von Haeseler A, Tautz D (1994) Comparative evolutionary analysis of rDNA ITS regions in Drosophila. Mol Biol Evol 11: 513–522
Schram FR (1991) Cladistic analysis of metazoan phyla and the placement of fossil problematica. In: Simonetta AM, Morris SC (eds) The early evolution of Metazoa. Cambridge University Press, Cambridge pp 35–46
Simon C, Pääbo S, Kocher T, Wilson AC (1990) Evolution of mitochondrial ribosomal RNA in insects as shown by the polymerase chain reaction In: Clegg M, O’Brien S (eds) Molecular evolution, vol 122. Liss, New York, pp 235–244
Simon C, Frati F, Beckenbach A, Crespi B, Liu H, Flook P (1994) Evolution, weighting, and phylogenetic utility of mitochondrial gene sequences and a compilation of conserved polymerase chain reaction primers. Ann Entomol Soc Am 87: 651–701
Smith AB (1992) Echinoderm phylogeny: morphology and molecules approach accord. Trends Ecol Evol 7: 224–229
Smith AB, Lafay B, Christen R (1992) Comparative variation of morphological and molecular evidence through geologic time: 28S ribosomal RNA versus morphology in echinoids. Philos Trans R Soc Lond [Biol] 338: 365–382
Smith MJ, Banfield DK, Doteval K, Gorski S, Kowbel DJ (1989) Gene arrangement in sea star mitochondrial DNA demonstrates a major inversion event during echinoderm evolution. Gene 76: 181–185
Smothers JF, von Dohlen CD, Smith LH, Spall RD (1994) Molecular evidence that the myxozoan protists are metazoans. Science 265: 1719–1721
Snodgrass RE (1950) Comparative studies on the jaws of mandibulate arthropods. Smithson Mise Collect 116: 1–85
Spears T, Abele LG, Applegate MA (1994) Phylogenetic study of cirripedes and selected relatives (Thecostraca) based on 18S rDNA sequence analysis. J Crust Biol 14: 641–656
Swofford DL, Olsen GJ (1990) Phylogeny reconstruction. In: Hillis DM, Moritz C (eds) Molecular systematics. Sinauer, Sunderland, pp 411–501
Tang J, Toè L, Back C, Unnasch TR (1996) Intra-specific heterogeneity of the rDNA internal transcribed spacer in the Simulium damnosum ( Diptera: Simuliidae) complex. Mol Biol Evol 13: 244–252
Terrett J, Miles S, Thomas RH (1994) The mitochondrial genome of Cepaea nemoralis (Gastropoda: Stylommatophora): gene order, base composition, and heteroplasmy. Nautilus Suppl 2: 79–84
Thenius E (1979) Die Evolution der Säugetiere. UTB, Stuttgart
Thompson JD, Higgins DG, Gibson TJ (1994) CLUSTAL W: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position-specific gap penalties and weight matrix choice. Nucleic Acids Res 22: 4673–4680
Turbeville JM, Field KG (1992) Phylogenetic position of phylum Nemertini, inferred from 18S rRNA sequences: molecular data as a test of morphological character homology. Mol Biol Evol 9: 235–249
Turbeville JM, Schulz JR, Raff RA (1994) Deuterostome phylogeny and the sister group of chordates: evidence from molecules and morphology. Mol Biol Evol 11: 648–655
Vahidi H, Honda BM (1991) Repeats and subrepeats in the intergenic spacer of rDNA from the nematode Meloidogyne arenaria. Mol Gen Genet 227: 334–336
Van de Peer Y, Neefs JM, De Rijk P, De Wächter R (1993) Reconstructing evolution from eucaryotic small-ribosomal-subunit RNA sequences: calibration of the molecular clock. J Mol Evol 37: 221–232
Van de Peer Y, Nicolai S, De Rijk P, De Wächter R (1996) Database on the structure of small ribosomal subunit RNA. Nucleic Acids Res 24: 86–91
Vawter L, Brown WM (1986) Nuclear and mitochondria DNA comparisons reveal extreme rate variation in the molecular clock. Science 234: 194–196
Vogler AP, DeSalle R (1994) Evolution and phylogenetic information content of the ITS-1 region in the tiger beetle Cicindela dorsalis. Mol Biol Evol 11: 393–405
Wada H, Satoh N (1994) Phylogenetic relationships among extant classes of echinoderms, as inferred from sequences of 18S rDNA, coincide with relationships deduced from the fossil record. J Mol Evol 38: 41–49
Wägele JW (1993) Rejection of the “Uniramia” hypothesis and implications of the Mandibulata concept. Zool Jb Syst 120: 253–288
Wägele JW (1994) Review of methodological problems of “computer cladistics” exemplified with a case study on isopod phylogeny (Crustacea: Isopoda). Z Zool Syst Evol Forsch 32: 81–107
Wägele JW (1996a) Identification of apomorphies and the role of groundpatterns in molecular systematics. J Zool Syst Evol Res 34: 31–39
Wägele JW (1996b) First principles of phylogenetic systematics, a basis for numerical methods used for morphological and molecular characters. Vie Milieu 46: 125–138
Wägele JW, Rodding T (1998) Estimation of conserved phylogenetic information content of alignments and of probability of homology. Mol Phylog Evol (in press)
Wägele JW, Stanjek G (1995) Arthropod phylogeny inferred from partial 12S rRNA revisited: monophyly of the Tracheata depends on sequence alignment. J Zool Syst Evol Res 33: 75–80
Wägele JW, Wetzel R (1994) Nucleic acid sequence data are not per se reliable for inference of phylogenies. J Nat Hist 28: 749–761
Wainright PO, Hinkle G, Sogin ML, Stickel SK (1993) Monophyletic origins of the Metazoa: an evolutionary link with fungi. Science 260: 340–342
Wesson DM, Porter CH, Collins FH (1992) Sequence and secondary structure comparisons of ITS rDNA in mosquitoes ( Diptera: Culicidae). Mol Phylog Evol 1: 253–269
West L, Powers D (1993) Molecular phylogenetic position of hexactinellid sponges in relation to the Protista and Demospongiae. Mol Mar Biol Biotechnol 2: 71–75
Wheeler WC, Cartwright P, Hayashi CY (1993) Arthropod phylogeny: a combined approach. Cladistics 9: 1–39
Winnepenninckx B, Backeljau T, Van de Peer Y, De Wachtler R (1992) Structure of the small ribosomal subunit RNA of the pulmonate snail, Limicolaria kambeul, and phylogenetic analysis of the Metazoa. FEBS Lett 309: 123–126
Winnepenninckx B, Backeljau T, De Wachter R (1994) Small ribosomal subunit RNA and the phylogeny of Mollusca. Nautilus Suppl 2: 98–110
Winnepenninckx B, Backeljau T, Mackey L, Brooks JM, De Wacher R, Kumar S, Garey JR (1995a) 18S rRNA data indicate that aschelminthes are polyphyletic in origin and consist of at least three distinct clades. Mol Biol Evol 12:1132–1137
Winnepenninckx B, Backeljau T, De Wachter R (1995b) Phylogeny of protostome worms derived from 18S rRNA sequences. Mol Biol Evol 12: 641–649
Winnepenninckx B, Backeljau T, De Wachter R (1996) Investigation of molluscan phylogeny on the basis of 18S rRNA sequences. Mol Biol Evol 13: 1306–1317
Zardoya R, Meyer A (1996) The complete nucleotide sequence of the mitochondrial genome of the lungfish ( Protopterus dolloi) supports its phylogenetic position as a close relative of land vertebrates. Genetics 142: 1249–1263
Zharkikh A, Li WH (1993) Inconsistency of the maximum-parsimony method: the case of five taxa with a molecular clock. Syst Biol 42: 113–125
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Wägele, J.W., Rödding, F. (1998). Origin and Phylogeny of Metazoans as Reconstructed with rDNA Sequences. In: Müller, W.E.G. (eds) Molecular Evolution: Towards the Origin of Metazoa. Progress in Molecular and Subcellular Biology, vol 21. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-72236-3_3
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