HIERARCHICAL CLASSIFICATION OF THE SUBPHYLUM TRILOBITOMORPHA (MOORE 1959)

EUKARYA> UNIKONTA> OPISTHOKONTA> ANIMALIA> BILATERIA> PROTOSTOMATA> ECDYSOZOA> PANARTHROPODA> ARTHROPODA> TRILOBITOMORPHA

This taxonomic system comes from Fortey (1997) and has a single class (Class Trilobita) with nine orders.

LITERATURE CITED Averof, M. and M. Akam. 1995. Insect-crustacean relationships: insights from comparative developmental and molecular studies. Phil. Trans. R. Soc. London. B. 347: 293-303. Ax, P. 2000. Multicellular Animals II. Springer Verlag. Berlin. Brusca, R. C. and G. J. Brusca. 2003. Invertebrates. Sinauer Associates, Inc. Sunderland, Mass. Buchsbaum, R. 1938. Animals Without Backbones, An Introduction to the Invertebrates. The University of Chicago Press. Chicago. Budd, G. E. 1998. Arthropod body plan evolution in the Cambrian with an example from anomalocaridid muscle. Lethaia. 31: 197-210. Budd, G. E. 2001. Tardigrades as ‘Stem-Group Arthropods’: The evidence from the Cambrian fauna. Zool. Anz. 240: 265-279. Conway Morris, S. (1998). The crucible of creation: the Burgess Shale and the rise of animals. Oxford [Oxfordshire]: Oxford University Press. pp. 56–9. Dunn, C.W., A. Hejnol, D.Q. Matus, K. Pang, W.E. Browne, S.A. Smith, E. Seaver, G.W. Rouse, M. Obst, G.D. Edgecombe, M.V. Sørensen, S.H.D. Haddock, A. Schmidt-Rhaesa, A. Okusu, R.M. Kristensen, W.C. Wheeler, M.Q. Martindale, and G. Giribet. 2008. Broad phylogenomic sampling improves resolution of the animal tree of life. Nature. 452: 745-749. Fortey, R.A. 1997. Phylogenetic Concepts in the History of Trilobite Classification. Second International Trilobite Conference, Brock University, St. Catharines, Ontario. Fortey, R. A. 2001. Trilobite Systematics: The last 75 years. Journal of Paleontology. 75(6): 1141-1151. Garey, J. R. 2001. Ecdysozoa: The relationship between Cycloneuralia and Panarthropoda. Zoologischer Anzeiger 240: 321-330. Giribet, G., G. D. Edgecombe, J. M. Carpenter, C. A. D’Haese, and W. C. Wheeler. 2004. Is Ellipura monophyletic? A combined analysis of basal hexapod relationships with emphasis on the origin of insects. Organisms, Diversity and Evolution. 4: 319-340. Hickman, C. P. 1973. Biology of the Invertebrates. The C. V. Mosby Company. Saint Louis. Ivantsov, A. Yu. 2004. New Proarticulata from the Vendian of the Arkhangel’sk Region. Paleontological Journal. 38(3): 247-253. Lavrov, D. V., W. M. Brown, and J. L. Boore. 2004. Phylogenetic position of the Pentastomida and (pan)crustacean relationships. Proceedings of the Royal Society of London. Series B. 271: 537-544. Mallatt, J. M., J. R. Garey, and J. W. Shultz. 2003. Ecdysozoan phylogeny and Baysean inference: first use of nearly complete 28S and 18S rRNA gene sequences to classify the arthropods and their kin. Molecular Phylogenetics and Evolution. 31: 178-191. Manton, S. F. 1977. The arthropod habits, functional morphology, and evolution. Clarendon Press. Oxford. Margulis, L. and K. Schwartz. 1998. Five kingdoms, an illustrated guide to the phyla of life on earth. 3rd Edition. W. H. Freeman and Company. New York. Mayer, G. 2006. Structure and development of onychophoran eyes: What is the ancestral visual organ in arthropods? Arthropod Structure and Development. 35: 231-245. Mayer, G. and P. M. Whittington. 2009. Velvet worm development links myriapods with chelicerates Nielsen, C. 2001. Animal Evolution: Interrelationships of the Living Phyla. 2nd Edition. Oxford University Press. Oxford. Patel, N. H., E. Martin-Blanco, K. G. Coleman, S. J. Poole, M. C. Ellis, T. B. Kornberg, and C. S. Goodman. 1989. Expression of engrailed proteins in arthropods, annelids, and chordates. Cell. 58: 955-968. Pechenik, J. A. 2005. Biology of the Invertebrates. McGraw-Hill. New York. Regier, J. C., J. W. Shultz, and R. E. Kambic. 2005. Pancrustacean phylogeny: hexapods are terrestrial crustaceans and maxillopods are not monophyletic. Proceedings of the Royal Society of London. Series B. 272: 395-401. Reiger, J. C., J. W. Schultz, A. R. D. Ganley, A. Hussey, D. Shi, B. Ball, A. Zwick, J. E. Stajich, M. P. Cummings, J. W. Martin, and C. W. Cunningham. 2008)Resolving arthropod phylogeny: exploring phylogenetic signal within 41 kb of protein-coding nuclear gene sequence. Syste. Biol 57(6): 920-938. Ruppert, E. E. and R. D. Barnes. 1994. Invertebrate Zoology. 6th edition. Saunders. Ft Worth, TX. Ruppert, E. E., R. S. Fox, and R. D. Barnes. 2004. Invertebrate Zoology: A Functional Evolutionary Approach. Seventh Edition. Thomson, Brooks/Cole. New York. pp. 1-963. Strausfeld, N. J., C. M. Strausfeld, R. Loesel, D. Rowell, and S. Stowe. 2006. Arthropod phylogeny: onychophoran brain organization suggests an archaic relationship with a chelicerate stem lineage. Proc. R. Soc. London. B. 273: 1857-1866. Telford, M. J. S. J. Bourlat, A. Economou, D. Papillion, and O. Rota-Stabelli. 2008. The evolution of Ecdysozoa. Phil. Trans. R. Soc. B. 363: 1529-1537. Tudge, C. 2000. The Variety of Life, A Survey and a Celebration of all the Creatures That Have Ever Lived. Oxford University Press. New York. Waggoner, B. M. 1996. Phylogenetic hypotheses of the relationships of arthropods to Precambrian and Cambrian problematic fossil taxa. Systematic Biology 45(2): 190-222. Whittington, H. B. and D. E. G. Briggs. 1985. The largest Cambrian animal, Anomalocaris, Burgess Shale, British Columbia. Phil. Trans. R. Soc. London. B. 309: 569-609. Willmer, P. 1990. Invertebrate relationships, patterns in animal evolution. Cambridge University Press. Cambridge.

By Jack R. Holt and Carlos A. Iudica. Last revised: 02/04/2012