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Nexosispinum
General
Description
Stratigraphy
Literature
Notes
Species
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Name
Original Description
hesperum
Davey, R.J. (1979b)
hesperus ssp. brevispinosum
Torricelli, S. (2000)
minimum
Prössl, K.F. (1990)
vetusculum
Davey, R.J. (1974)
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