Abstract
Synrhabdosomes are monospecific colonies of colonies of graptolites. Their mode of formation is unknown. We draw attention to a type of colony formation found in two genera of colonial rotifers and suggest that these represent plausible models for the life cycle of graptolite synrhabdosomes.
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References
Bjerreskov M (1976) A new type of synrhabdosome. Bull Geol Soc Den 25:41–47
Bonner JT (1966) Size and cycle. Princeton University Press, Princeton
Bulman OMB (1931) South American graptolites with special reference to the Nordenskiöld Collection. Arkiv för Zoologi 22A:1–111
Dilly PN (1973) Larva of Rhabdopleura compacta (Hemichordata). Marine Biol 18:69–86
Dilly PN (1993) Cephalodiscus graptolitoides sp. nov. a probable graptolite. J Zool 229:69–78
Gilchrist JDF (1917) On the development of Cape Cephalodiscus (C. gilchristi Ridewood). Q J Microsc Sci 62:189–212
Goldman D, Mitchell CE (1994) Three-dimensional graptolites from the upper Middle Ordivician Neuville Formation, Quebec. N Y State Mus Bull 481:87–99
Gutierrez-Marco JC, Lenz AC (1998) Graptolite synrhabdosomes: biological or taphonomic entities? Paleobiology 24:37–48
Hochberg R (2006) On the serotonergic nervous system of two planktonic rotifers, Conochilus coenobasis and C. dossuarius (Monogononta, Flosculariacea, Conochilidae). Zoologischer Anzeiger 245:53–62
Hochberg R, Lilley G (2010) Neuromuscular organization of the freshwater colonial rotifer, Sinantherina socialis, and its implications for understanding the evolution of coloniality in Rotifera. Zoomorphology 129:153–162
Kozlowski R (1949) Les graptolithes et quelques nouveaux groupes d’animaux du Tremadoc de la Pologne. Paleotologica Polonica 31:1–235
Rickards RB (1975) Paleoecology of the Graptoliithina, an extinct class of the Phylum Hemichordata. Biol Rev 50:397–436
Rickards RB (1996) The graptolite nema: problem to all our solutions. Geol Mag 133:343–346
Ruedemann R (1904) Graptolites of New York, part I. Graptolites of the lower beds. N Y State Mus Mem 7:455–807
Ruedemann R (1947) Graptolites of North America: Geological Society of America Memoir 10:652
Stebbing AR (1970) Aspects of reproduction and life cycle of Rhabdopleura compacta (Hemichordata). Marine Biol 5:205–212
Surface FM (1906) The formation of new colonies of the rotifer, Megalotrocha alboflavicans, EHR. Biol Bull 11:182–192
Wallace RL (1987) Coloniality in the phylum Rotifera. Hydrobiologia 147:144–155
Wallace RL (2002) Rotifers: exquisite metazoans. Integr Comp Biol 42:660–667
Wallace RL, Snell TW (2001) Phylum Rotifera. In: Thorp J, Covich A (eds) Ecology and classification of North American freshwater invertebrates. Elsevier, Amsterdam, pp 173–235
Walters M (1977) Middle and Upper Ordovician graptolites from St. Lawrence lowlands, Quebec, Canada. Can J Earth Sci 14:932–962
Acknowledgments
We thank Sean Rice for comments. We thank Robert Wallace and Charles Mitchell for comments. L.W.B’s debt to Jeremy Jackson is of a magnitude that it can only be repaid by trying to do as well by my own students.
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Buss, L.W., Rice, M.G. Synrhabdosome life cycles. Evol Ecol 26, 259–263 (2012). https://doi.org/10.1007/s10682-011-9535-1
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DOI: https://doi.org/10.1007/s10682-011-9535-1