Rhabdotubus
Rhabdotubus is a pterobranch, which bears strong similarity to the graptolites.[1][2][3] It is known from the lower to the middle Cambrian.
References
- ^ Maletz, J.; Steiner, M.; Fatka, O. (2005), "Middle Cambrian pterobranchs and the Question: What is a graptolite?" (PDF), Lethaia, 38 (1): 73–85, retrieved 2009-06-06
- ^ Durman, P.N.; Sennikov, N.V. (1993), "A new rhabdopleurid hemichordate from the Middle Cambrian of Siberia" (PDF), Palaeontology, 36: 283–283, retrieved 2009-06-06
- ^ Urbanek, A. (1994), "When is a pterobranch a graptolite?", Lethaia, 27 (4): 324–324, retrieved 2009-06-06
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