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Evolution of the Late Palaeozoic Caenogastropoda

A. Nützel

The subclass Caenogastropoda is the most diverse group of the Recent Gastropoda. The first undoubted caenogastropods are from the Late Palaeozoic. Caenogastropods can have planktotrophic larval development and larval shells are commonly ornamented in a characteristic way. Therefore, protoconch morphology can be very informative in terms of systematics and larval ecology. Protoconch preservation is very rare in the Palaeozoic. However, in some faunas of the U.S.A. and Australia such well-preserved material is available.

2-1-2abb-aFig.1: Carboniferous (Mississippian) subulitoid gastropods of the family Imoglobidae Nützel, Erwin & Mapes 2000. All specimens smaller one 1 mm. These bulbous caenogastropods are characterized by a particular fine larval shell ornament.

 

This increases the number of shell characters and therefore the significance of phylogenetic analyses. Phylogenetic, systematic, and taxonomic work has been carried out in DFG-funded projects (especially NU 96/3-1, 3-2) and is still ongoing. The most important Late Paleozoic caenogastropod groups that have been studied are the Subulitoidea, The Zygopleuroidea (especially Pseudozygopleuridae), and the Cerithioidea (e.g., Goniasmatidae and Orthonematidae). These studies allow also a substantial comparison with Mesozoic groups which helps to understand the end-Permian extinction event better. I also try to clarify the early evolutionary history and roots of the major extant caenogastropod clades.

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Fig. 2: Phylogenetic Tree (PAUP) of Late Paleozoic Subulitoidea (modified from Nützel et al. 2000).

 

Contact

Alexander Nützel

Cooperations

Douglas H. Erwin, Dept. of Paleobiology, Museum of Natural History, Smithsonian Institution, Washington D.C., U.S.A., http://paleobiology.si.edu/staff/individuals/erwinD.cfm

Jiri Frýda, Czech Geological, Prag, Czech Republic; http://www.geology.cz/portal/page/portal/shared/j/jiri.fryda

Winston F. Ponder, Australian Museum of Natural History, Australia; http://www.amonline.net.au/invertebrates/staff/ponder.htm

Pan Hua-zhang,  Nanjing Institute of Geology and Palaeontology, Academia Sinica, Nanjing, People’s Republic of China.

Royal, H. Mapes, Department of Geological Sciences, Ohio University, Athens 45701, U.S.A.; http://cneuro.zool.ohiou.edu/grad/bioscience/professors/royalmapes.html

Alex Cook, Queensland Museum, Brisbane, Australia; http://www.qm.qld.gov.au/Research/People/People/Profile/C/Alex+Cook

Publications

COOK, A., NÜTZEL, A. & FRÝDA, J. 2008. Two Carboniferous caenogastropod limpets from Australia and their meaning for the ancestry of the Caenogastropoda. – Journal of Paleontology.

FRYDA, J., NÜTZEL, A. & WAGNER, P. 2008. Paleozoic Gastropoda. In Ponder, W. and Lindberg, D. L. (eds) In Ponder, W. and Lindberg, D. L. (eds), Phylogeny and evolution of the Mollusca. University of California Press (Berkeley, Los Angeles, London): 239-270.

PONDER, W.F., COLGAN, D.J., HEALY, J.M., NÜTZEL, A., SIMONE, L.R.L. & STRONG, E.E.  2008. Caenogastropod phylogeny. – In: PONDER, W. & LINDBERG, D.L. (Hrsg.): Molluscan Phylogeny, Proceedings of the World Congress of Malacology in Perth 2004.

NÜTZEL, A. & PAN HUA-ZHANG 2005. Late Paleozoic evolution of the Caenogastropoda: larval shell morphology and implications for the Permian/Triassic mass extinction event. – Journal of Paleontology 79: 1175-1188.

BANDEL, K., NÜTZEL, A. & YANCEY, T.E. 2002. Larval shells and shell microstructures of exceptionally well-preserved Late Carboniferous gastropods from the Buckhorn Asphalt deposit (Oklahoma, USA). – Senckenbergiana lethaea 82: 639-689.

NÜTZEL, A. & COOK, A.G. 2002. Chlorozyga, a new caenogastropod genus from the Early Carboniferous of Australia. – Alcheringa 26:151-157.

NÜTZEL, A., ERWIN, D.H. & MAPES, R.H. 2000. Identity and Phylogeny of the Late Paleozoic Subulitoidea (Gastropoda). – Journal of Paleontology 74: 575-598.

NÜTZEL, A. & BANDEL, K. 2000. Goniasmidae and Orthonemidae: two new families of Palaeozoic Caenogastropoda. – Neues Jahrbuch für Geologie und Paläontologie, Monatshefte 2000 (9): 557-569.

NÜTZEL, A. 1998. Über die Stammesgeschichte der Ptenoglossa (Gastropoda). – Berliner Geowissenschaftliche Abhandlungen (E) 26: 1-229.