Abstract
The results of recent laboratory hybridization studies on the ceratophysellan lineage species are synthesized, and their impact on the taxonomy of this lineage is discussed. The discovered rule that morphological similarity is proportional to the reproductive isolation degree and in consequence to the relationship between species is a good basis for distinguishing species with potential for classification of the ceratophysellan lineage. The morphological and biological species concepts appear to be fully compatible, and Schaefferia emucronata, S. willemi, Ceratophysella denticulata, C. engadinensis, C. stercoraria, C. silvatica, and C. granulata appear to be species consistent with the general lineage concept. The proposed new classification of the ceratophysellan lineage (composed of two genera: C. denticulata group + Typhlogastrura + Schaefferia and C. armata group + Bonetogastrura) is tested against the results of laboratory hybridization studies. The probable monophyly of Schaefferia and polyphyly of Bonetogastrura and Typhlogastrura show that the phylogeny of the ceratophysellan lineage is more complicated than suggested by presently accepted and proposed classifications. The obtained results are only a premise, and the probability of the conclusion being correct would increase with the number of such tests.References
Absolon, K. (1900) Vorläufige Mittheilung über einige neue Collembolen aus den Höhlen des mahrischen Karstes. Zoologischer Anzeiger, 23, 265-–69.
Arnold, M.L. (1997) Natural hybridization and evolution. Oxford University Press Oxford, 215 pp.
Babenko, A.B., Chernova, N.M., Potapov, M.B. & Stebaeva S.K. (1994) Collembola of Russia and adjacent countries: Family Hypogastruridae. Nauka Moscow, 336 pp.
Bellinger, P., Christiansen, K.A. & Janssens, F. (2005) Checklist of the Collembola of the World. Available from: http://www.collembola.org (accessed 30 June 2005).
Bonet, F. (1930) Remarques sur les Hypogastruriens cavernicoles avec descriptions d’espèces nouvelles. Eos, 6, 113–139.
Börner, C. (1901) Über einige theilweise neue Collembolen aus den Höhlen der Gegend von Letmanthe in Westfalen. Zoologischer Anzeiger, 24, 333–345.
Bourgeois, A. (1973) Polymorphisme et épitoquie chez Ceratophysella tuberculata (Collembole Hypogastruridae). Revue d’Ecologie et de Biologie du Sol, 10, 589–601.
Bourgeois, A. (1974) Nouveaux cas d’épitoquie chez les Collemboles Hypogastruridae. Pedobiologia, 14, 191–195.
Bourgeois, A. & Cassagnau, P. (1972) La différenciation du type Ceratophysellien chez les Collemboles Hypogastruridae. Nouvelle Revue d’Entomologie, 2, 271–291.
Cassagnau, P. (1986) Les écomorphoses des Collemboles. I. Déviation de la morphogenèse et perturbations histophysiologique. Annales de la Société Entomologique de France N. S., 22, 7–33.
Cassagnau, P. & Izarra, D. C. (1969) Contribution à l’étude des écomorphoses. IV Sur la signification de la forme crassispina chez Ceratophysella armata var. attenuata Cassagnau (Collemboles Poduromorphe). Bulletin de la Société Zoologique de France, 94, 243–250.
Christian, E. (1982) Die Augen-Variabilität bei Bonetogastrura cavicola (Börner, 1901): Eidonomische, topographische und numerische Variabilität (Collembola: Hypogastruridae). Zoologischer Anzeiger, 209, 47–59.
Christian, E. (1983) Variation in eye number in Austrian cave populations of Bonetogastrura cavicola (Collembola, Hypogastruridae). Pedobiologia, 25, 266.
Christiansen, K. (1985) Regressive evolution in Collembola. Natural Science Series Bulletin, 47, 89–100.
Christiansen, K. & Culver, D. (1968) Geographical variation and evolution in Pseudosinella hirsuta. Evolution, 22, 237–255.
Christiansen, K. & Bellinger, P. (1980) The Collembola of North America north of the Rio Grande. Grinnell College Grinnell, 1321 pp.
de Queiroz, K. (1998) The general lineage concept of species, species criteria, and the process of speciation. In: Howard, D.J. & Berlocher, S.H. (Eds.), Endless forms: species and speciation. Oxford University Press New York, pp. 57–75.
Dobzhansky, T. (1937) Genetics and the origin of species. Columbia University Press New York, 364 pp.
Fjellberg, A. (1985) Arctic Collembola. 1. The collembolan fauna of Alaska: Families Poduridae, Hypogastruridae, Odontellidae, Brachystomellidae and Neanuridae. Entomologica Scandinavica Suppl., 21, 1–126.
Gisin, H. (1947) Notes taxonomiques sur quelques especes suisses des genres Hypogastrura et Xenylla (Collembola). Mitteilungen der Schweizerischen Entomologischen Gesellschaft, 20, 341–344.
Gisin, H. (1949) Notes sur les Collemboles avec description de quatorze espèces et d’un genre nouveaux. Mitteilungen der Schweizerischen Entomologischen Gesellschaft, 22, 385–400.
Gisin, H. (1960) Collembolenfauna Europas. Museum d’Histoire Naturelle Geneva, 312 pp.
Harrison, R. (1993) Hybrid zones and the evolutionary process. Oxford University Press Oxford, 364 pp.
Hennig, W. (1966) Phylogenetic Systematic. Univeristy of Illinois Press Urbana, 280 pp.
Hermosilla, W., Thibaud, J.M. & Keuck, G. (1984) Essai d’application de la taxonomie numérique au genre Schaefferia Absolon, 1900 (Insecte Collembole Poduromorphe). Revue d’Écologie et de Biologie du Sol, 21, 101–114.
Hermosilla, W., Thibaud, J.M. & Keuck, G. (1985). Essai d’application de la taxinomie numérique aux genres Bonetogastrura Thibaud, 1974, et Typhlogastrura Bonet, 1930 (Insecte Collembole Poduromorphe). Bulletin du Muséum National d’Histoire Naturelle, Paris, Serie 4, 7, 637–657.
Hillis, D.M., Moritz, C. & Mable, B.K. (1996) Molecular Systematics. Sinauer Associates Inc. Sunderland, 655 pp.
Hopkin, S.P. (1997) Biology of the springtails (Insecta: Collembola). Oxford University Press Oxford, 330 pp.
Hopkin, S. (2005) The natural World in close up. Available from: http://www.stevehopkin.co.uk (accessed 30 June 2005).
Howard, D.J. & Berlocher, S.H. (1998) Endless forms: species and speciation. Oxford University Press New York, 470 pp.
Jordana, R., Arbea, J.I., Simón, C. & Luciáñez, M.J. (1997) Collembola, Poduromorpha. In Ramos, M. A. et al. (Eds.). Fauna Ibérica, Museo Nacional de Ciencias Naturales Madrid CSIC, 8, 807 pp.
Mayr, E. (1963) Animal species and evolution. Belknap Press Cambridge Mass., 797 pp.
Najt, J., Dalens, H. & Deharveng, L. (1984) Note sur la biologie, le polymorphisme et le statut taxonomique de quelques populations d’Hypogastrura du sous-groupe tullbergi. Revue d’Écologie et de Biologie du Sol, 21, 395–413.
Palissa, A. (2000) Beiträge zur Collembolenfauna deutscher Mittelgebirge, Teil II. Beiträge zur Entomologie, 50, 199–236.
Simonsen, V., Filser, J., Krogh, P.H. & Fjellberg, A. (1999) Three species of Isotoma (Collembola, Isotomidae) based on morphology, isozymes and ecology. Zoologica Scripta, 28, 281–287.
Simpson, G.G. (1961) Principles of Animal Taxonomy. Columbia University Press New York, 247 pp.
SkarÛy¾ski, D. (1997) Klasyfikacja filogenetyczna Hypogastruridae (Collembola). PhD dissertation, Wrocªaw University Wrocªaw, 88 pp [in Polish].
SkarÛy¾ski, D. (2000) Notes on morphology and behaviour of the reproductive stage of Ceratophysella denticulata (Bagnall, 1941) (Collembola: Hypogastruridae). Genus, 11, 521–526.
SkarÛy¾ski, D. (2001) Notes on morphology of the reproductive stage of two species of the genus Schaefferia Absolon, 1900 (Collembola, Hypogastruridae). Genus, 12, 1–5.
SkarÛy¾ski, D. (2002) Parthenogenesis in Ceratophysella succinea (Gisin, 1949) (Collembola, Hypogastruridae). Polskie Pismo Entomologiczne, 71, 323–326.
SkarÛy¾ski,, D. (2003) Polymorphism in Ceratophysella armata (Nicolet, 1841) from the Tatra Mountains (Poland) (Collembola: Hypogastruridae). Genus, 14, 1–5.
SkarÛy¾ski, D. (2004 a) Taxonomic status of Schaefferia emucronata Absolon, 1900 and Schaefferia willemi (Bonet, 1930) (Collembola, Hypogastruridae) in the light of hybridisation studies. Mitteilungen aus dem Museum fur Naturkunde in Berlin, Deutsche Entomologische Zeitschrift, 51, 81–86.
SkarÛy¾ski, D. (2004 b) Generic status of Bonetogastrura cavicola (Börner, 1901) (Collembola: Hypogastruridae) in the light of laboratory hybidization studies. Annales Zoologici, 54, 461–466.
SkarÛy¾ski, D. (2004 c) Taxonomic position of Ceratophysella granulata Stach, 1949 and Ceratophysella silvatica (Rusek, 1964) in the light of morphological and laboratory hybridization studies. Acta Zoologica Cracoviensia, 47, 147–153.
SkarÛy¾ski, D. (2004 d) Taxonomic status of Ceratophysella denticulata (Bagnall, 1941), C. engadinensis (Gisin, 1949) and C. stercoraria Stach, 1963 (Collembola: Hypogastruridae) in the light of laboratory hybridisation studies. Insect Systematics and Evolution, 35, 277–284.
Stach, J. (1949) The apterygotan fauna of Poland in relation to the world fauna of this group of insects. Families Neogastruridae and Brachystomellidae. Acta Monographica Musei Historiae Naturalis, Polish Academy of Sciences and Letters Kraków, 341 pp.
Strebel, O. (1965) Weitere Beiträge zur Apterygotenfauna der Siebengebirges. Decheniana, 118, 93–106.
Thibaud, J.M. (1970) Biologie et écologie des Collemboles Hypogastruridae édaphiques et cavernicoles. Memoires du Muséum National d’Histoire Naturelle, Zoologie 61A, 83–201.
Thibaud, J.M. (1972) Revision du genre Schaefferia Absolon, 1900 (Insecte, Collembole). Annales de Spéléologie, 27, 363–394.
Thibaud, J.M. (1974) Subdivision de Typhlogastrura, genre troglobie de la famille des Hypogastruridae (Insectes Collemboles). Actes du XIe Congrès nat. Spéléol. Périgueux 1974. Spelunca, 8, 205–208.
Thibaud, J.M. (1976) Structure et régression de l’appareil oculaire chez les Insectes Collemboles. Revue d’Ecologie et de Biologie du Sol, 13, 173–190.
Thibaud, J.M. (1980) Révision des genres Typhlogastrura Bonet, 1930, et Bonetogastrura Thibaud, 1974 (Insectes, Collemboles). Bulletin du Muséum National d’Histoire Naturelle, Paris, Serie 4, 2, 245–287.
Thibaud, J.M. (1994) For a biological and ecological classification of cavernicolous Collembola (Hexapoda). Mémoires de Biospéleologie, 21, 147–149.
Thibaud, J.M., Schulz, H.J. & da Gama Assalino, M.M. (2004) Synopses on Palearctic Collembola. Hypogastruridae. Vol. 4, Abhandlungen und Berichte des Naturkundemuseums Görlitz, 75, 1–287.
Yosii, R. (1956) Monographie der Hölencollembolen Japans. Contributions from the Biological Laboratory, Kyoto University, 3, 1–109.
Yosii, R. (1960) Studies on the Collembolan genus Hypogastrura. American Middland Naturalist, 64, 257–281.
Yosii, R. (1961) Phylogenetische Bedeutung der Chetotaxie bei den Collembolen. Contributions from the Biological Laboratory, Kyoto University, 12, 1–37.
Yosii, R. (1962) Studies on the Collembolan genus Hypogastrura II. Contributions from the Biological Laboratory, Kyoto University, 13, 1–25.
Zettel, U. & Zettel, J. (1994) Seasonal and reproductional polymorphism in Ceratophysella sigillata (Uzel) (Collembola, Hypogastruridae). Acta Zoologica Fennica, 195, 154–156.