Michael J. Wynne, Christian Boedeker, Giuseppe C. Zuccarello
{"title":"(2994) Proposal to conserve Chaetomorpha, nom. cons., (Cladophoraceae, Chlorophyta) with a conserved type","authors":"Michael J. Wynne, Christian Boedeker, Giuseppe C. Zuccarello","doi":"10.1002/tax.13087","DOIUrl":null,"url":null,"abstract":"<p>(2994) <b><i>Chaetomorpha</i></b> Kütz., Phycol. Germ.: 203. 14–16 Aug 1845, nom. cons.</p>\n<p>Typus: <i>C. linum</i> (O.F. Müll.) Kütz. (<i>Conferva linum</i> O.F. Müll.), typ. cons. prop.</p>\n<p>(=) <i>Chloronitum</i> Gaillon in Cuvier, Dict. Sci. Nat. 53: 389. Mai 1828, nom. rej.</p>\n<p>Typus (vide Pfeiffer, Nomencl. Bot. 1: 725. 1873): <i>C. aereum</i> (Dillwyn) Gaillon (<i>Conferva aerea</i> Dillwyn).</p>\n<p>(=) <i>Spongopsis</i> Kütz., Phycol. General.: 261. 14–16 Sep 1843, nom. rej.</p>\n<p>Typus: <i>S. mediterranea</i> Kütz.</p>\n<p>The green algal genus <i>Chaetomorpha</i> Kütz. (Phycol. Germ.: 203. 1845), nom. cons. in the order <i>Cladophorales</i> is a widely distributed taxon with a total of 77 currently recognized species (Guiry & Guiry, AlgaeBase. https://www.algaebase.org/search/species/?name=Chaetomorpha). Silva (in Hydrobiologia 2: 254. 1950) proposed that the name <i>Chaetomorpha</i> be conserved against <i>Chloronitum</i> Gaillon (in Cuvier, Dict. Sci. Nat. 53: 389. 1828) and <i>Spongopsis</i> Kütz. (Phycol. General.: 261. 1843) because “neither <i>Chloronitum</i> nor <i>Spongopsis</i> had received recognition”, and that proposal was accepted. Silva (l.c.) also proposed <i>Chaetomorpha melagonium</i> (Weber & Mohr) Kütz. as the type of <i>Chaetomorpha</i>, which was also accepted. With a current total of 372 entries in GenBank for <i>Chaetomorpha</i>, including entries for the generitype and more than 30 other species currently assigned to the genus, with sequence data from several genes, it has become apparent that the generitype <i>C. melagonium</i> does not group with any of the other species placed in the genus (Boedeker & al. in J. Phycol. 52: 905. 2016, 54: 616. 2018). This difference is substantial, essentially at the level of genus. There appear to be two options to treat this untenable situation. The first would be to leave the genus intact with only the generitype <i>C</i>. <i>melagonium</i> left in the genus, on the basis of what is currently known, and to transfer the many other species demonstrated to be genetically different to a possible new genus or to a reinstated genus that is now treated as congeneric, such as <i>Spongopsis</i>, typified by <i>S</i>. <i>mediterranea</i> Kütz. (l.c. 1843), although that genus was discounted in Silva's (l.c.) proposal to conserve <i>Chaetomorpha</i>. The alternative option would be to propose to conserve <i>Chaetomorpha</i> with a new conserved type, which would impact only on <i>C</i>. <i>melagonium</i>. In our opinion, a possible candidate to serve as the new conserved type is <i>Chaetomorpha linum</i> (O.F. Müll.) Kütz. (l.c. 1845: 204), based on <i>Conferva linum</i> O.F. Müll. (Fl. Dan. 5(13): 7, t. DCCLXXI. 1777), which is well recognized and widely occurring. It was one of the 15 species originally assigned to <i>Chaetomorpha</i> by Kützing (l.c. 1845). <i>Chaetomorpha linum</i> is one of the group of species that are not affiliated with <i>C. melagonium</i>. This latter option would be least disruptive in our opinion. The many species of <i>Chaetomorpha</i> now assigned to the genus would remain in the genus with the new conserved type, <i>C</i>. <i>linum</i>. If this proposal is approved, we would create a new generic name for <i>C</i>. <i>melagonium</i>.</p>","PeriodicalId":49448,"journal":{"name":"Taxon","volume":"10 1","pages":""},"PeriodicalIF":2.0000,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Taxon","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1002/tax.13087","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"EVOLUTIONARY BIOLOGY","Score":null,"Total":0}
The green algal genus Chaetomorpha Kütz. (Phycol. Germ.: 203. 1845), nom. cons. in the order Cladophorales is a widely distributed taxon with a total of 77 currently recognized species (Guiry & Guiry, AlgaeBase. https://www.algaebase.org/search/species/?name=Chaetomorpha). Silva (in Hydrobiologia 2: 254. 1950) proposed that the name Chaetomorpha be conserved against Chloronitum Gaillon (in Cuvier, Dict. Sci. Nat. 53: 389. 1828) and Spongopsis Kütz. (Phycol. General.: 261. 1843) because “neither Chloronitum nor Spongopsis had received recognition”, and that proposal was accepted. Silva (l.c.) also proposed Chaetomorpha melagonium (Weber & Mohr) Kütz. as the type of Chaetomorpha, which was also accepted. With a current total of 372 entries in GenBank for Chaetomorpha, including entries for the generitype and more than 30 other species currently assigned to the genus, with sequence data from several genes, it has become apparent that the generitype C. melagonium does not group with any of the other species placed in the genus (Boedeker & al. in J. Phycol. 52: 905. 2016, 54: 616. 2018). This difference is substantial, essentially at the level of genus. There appear to be two options to treat this untenable situation. The first would be to leave the genus intact with only the generitype C. melagonium left in the genus, on the basis of what is currently known, and to transfer the many other species demonstrated to be genetically different to a possible new genus or to a reinstated genus that is now treated as congeneric, such as Spongopsis, typified by S. mediterranea Kütz. (l.c. 1843), although that genus was discounted in Silva's (l.c.) proposal to conserve Chaetomorpha. The alternative option would be to propose to conserve Chaetomorpha with a new conserved type, which would impact only on C. melagonium. In our opinion, a possible candidate to serve as the new conserved type is Chaetomorpha linum (O.F. Müll.) Kütz. (l.c. 1845: 204), based on Conferva linum O.F. Müll. (Fl. Dan. 5(13): 7, t. DCCLXXI. 1777), which is well recognized and widely occurring. It was one of the 15 species originally assigned to Chaetomorpha by Kützing (l.c. 1845). Chaetomorpha linum is one of the group of species that are not affiliated with C. melagonium. This latter option would be least disruptive in our opinion. The many species of Chaetomorpha now assigned to the genus would remain in the genus with the new conserved type, C. linum. If this proposal is approved, we would create a new generic name for C. melagonium.
期刊介绍：
TAXON is the bi-monthly journal of the International Association for Plant Taxonomy and is devoted to systematic and evolutionary biology with emphasis on plants and fungi. It is published bimonthly by the International Bureau for Plant Taxonomy and Nomenclature, c/o Institute of Botany, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 23 Bratislava, SLOVAKIA. Details of page charges are given in the Guidelines for authors. Papers will be reviewed by at least two specialists.
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