ON THE IDENTITIES OF LATE PALEOZOIC SPHENOPHYLLUM KOENIG AND SPHENOPHYLLUM BRONGNIART (SPHENOPSIDA)
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Abstract:
A study history of Sphenophyllum Koenig and Sphenophyllum Brongniart is reviewed briefly,and the generic identities are discussed in detail.According to relevant literature,Sphenophyllum Koenig and Sphenophyllum Brongniart were actually established on the basis of a same type,Sphenophyllites emarginatus Brongniart,1822.In accordance with the International Code of Botanical Nomenclature,Articles 32.1,14.4 and Appendix III(Vienna Code,see McNeill et al.,2006),Sphenophyllum Koenig is an invalid name because it has no clear date of publication and thereby should be rejected.Meanwhile,Sphenophyllum Brongniart has been proposed as a conserved name in view of the widespread use,so its nomenclatural synonym Sphenophyllites Brongniart,1822 should be rejected.Therefore,Sphenophyllum Brongniart,1828 is the correct name.
