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A census of J.P.L.Dangeard's invalid taxa with proposals to resolve the nomenclatural problems of some of them

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Attention is called to the failure of P.J.L.Dangeard to designate Types for essentially all of his new algal taxa proposed after 1957. Designation of Types was a requirement of the Melbourne Code starting 1 Jan., 1958. So the numerous names of both genera and species are invalid. Some of Dangeard's species were later transferred to other genera or became the purported types of new genera, but all of these subsequent names were also invalid, as were any proposed new species assigned to Dangeard's invalid generic names. The names Neostromatella gen. nov. and N. monostromatica sp. nov. are proposed, replacing the invalid names Stromatella Kornmann & Sahling and Ulvella monostromatica P.J.L.Dangeard. We also propose the name Umbraulva dangeardii sp. nov. [= Ulva olivascens J.P.L.Dangeard nom. inval. and Umbraulva olivascens (P.J.L.Dangeard) G. Furnari nom. inval.]. The names Neodangemannia gen. nov. and N. microcystis are proposed, replacing the invalid names Dangemannia and D. microcystis, based on Ulvella microcystis P.J.L.Dangeard nom. inval. These are "first steps" in resolving the many nomenclatural problems left by Dangeard's failure to designate type specimens.
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Keywords: DANGEARD; INVALID NAMES; MARINE ALGAE; N. MICROCYSTIS SP. NOV; N. MONOSTROMATICA SP. NOV; NEODANGEMANNIA GEN. NOV; NEOSTROMATELLA GEN. NOV; UMBRAULVA DANGEARDII SP. NOV

Document Type: Research Article

Publication date: May 1, 2014

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  • Nova Hedwigia is an international journal publishing original, peer-reviewed papers on current issues of taxonomy, morphology, ultrastructure and ecology of all groups of cryptogamic plants, including cyanophytes/cyanobacteria and fungi. The half-tone plates in Nova Hedwigia are known for their high quality, which makes them especially suitable for the reproduction of photomicrographs and scanning and transmission electron micrographs.
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