Abstract
Bdelloids show a rather uniform morphology of jaws (trophi), named ramate. The most recognizable feature is the presence of a series of teeth forming unci plates. The unci are not uniform in size; each plate has 1–10 major median teeth. Using SEM pictures of trophi and data from the literature, we analyzed the number of major unci teeth in relation to trophi size, total number of teeth, and environmental features. Variability in the number of major unci teeth in bdelloids is not related to trophi size or to total number of unci teeth, while total number of unci teeth and trophi size seem to be related to each other: larger trophi in general have more teeth than smaller trophi. Few major teeth are more common in species living in water bodies where they possibly eat unicellular algae, while more major teeth are more common in species living outside water bodies, among mosses and lichens, where they possibly eat bacteria.
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References
Bērzinš, B. & B. Pejler, 1987. Rotifer occurrence in relation to pH. Hydrobiologia 147: 107–116.
Bērzinš, B. & B. Pejler, 1989a. Rotifer occurrence and trophic degree. Hydrobiologia 182: 171–180.
Bērzinš, B. & B. Pejler, 1989b. Rotifer occurrence in relation to oxygen content. Hydrobiologia 183: 165–172.
Donner, J., 1965. Ordnung Bdelloidea (Rotifera, Rädertiere). Akademie Verlag, Berlin 297.
Fontaneto, D. & G. Melone, 2003. Redescription of Pleuretra hystrix, an endemic alpine bdelloid rotifer. Hydrobiologia 497: 153–160.
Fontaneto, D., G. Melone, & A. Cardini, 2004. Shape diversity in the trophi of different species of Rotaria (Rotifera, Bdelloidea): a geometric morphometric study. Italian Journal of Zoology, 71: 63–72.
Gosse, P. H., 1856. On the structure, functions and homologies of the manducatory organs in the class Rotifera. Philosophical Transactions of the Royal Society of London 146: 419–452.
Koste, W., 1978. Rotatoria. Die Rädertiere Mitteleuropas. Borntraeger, Berlin, 673 pp.
Markevich, G. I., 1985. Ultrathin morphology of mastax of rotifers. I. Bdelloida [in Russian]. Bulletin of the Institute for the Biology of Inland Waters 68: 31–35.
Markevich, G. I., 1989. Morphology and the principle organization of sclerite system of the mastax in rotifers [in Russian]. Proceedings of the Institute for the Biology of Inland Waters 56: 27–82.
Markevich, G. I. & L. A. Kutikova, 1989. Mastax morphology under SEM and its usefulness in reconstructing rotifer phylogeny and systematics. Hydrobiologia 186/187: 285–289.
Melone, G., C. Ricci, H. Segers & R. L. Wallace, 1998a. Phylogenetic relationships of phylum Rotifera with emphasis on the families of Bdelloidea. Hydrobiologia 388: 101–107.
Melone, G., C. Ricci & H. Segers, 1998b. The trophi of Bdelloidea (Rotifera): a comparative study across the class. Canadian Journal of Zoology 76: 1755–1765.
Ricci, C., G. Melone & E. J. Walsh, 2001. A carnivorous bdelloid rotifer, Abrochtha carnivora n.sp. Invertebrate Biology 120: 136–141.
Ricci, C., R. J. Shiel, D. Fontaneto & G. Melone, 2003. Bdelloid rotifers recorded from Australia with description of Philodinavus aussiensis n.sp. Zoologischer Anzeiger 242: 241–248.
Segers, H., 1993. Rotifera of some lakes in the floodplain of the River Niger (Imo State, Nigeria). I. New species and other taxonomic considerations. Hydrobiologia 250: 39–61.
Segers, H., 2002. The nomenclature of the Rotifera: annotated checklist of valid family and genus-group names. Journal of Natural History 36: 631–640.
Sørensen, M. V., 2002. On the evolution and morphology of the rotiferan trophi, with a cladistic analysis of Rotifera. Journal of Zoological Systematics and Evolutionary Research 40: 129–154.
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Melone, G., Fontaneto, D. (2005). Trophi structure in bdelloid rotifers. In: Herzig, A., Gulati, R.D., Jersabek, C.D., May, L. (eds) Rotifera X. Developments in Hydrobiology, vol 181. Springer, Dordrecht. https://doi.org/10.1007/1-4020-4408-9_19
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DOI: https://doi.org/10.1007/1-4020-4408-9_19
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