Since the first phylogenetic study of the order Batrachospermales,
A new genus,
- NSF-PAR ID:
- 10046971
- Publisher / Repository:
- Wiley-Blackwell
- Date Published:
- Journal Name:
- Journal of Phycology
- Volume:
- 54
- Issue:
- 1
- ISSN:
- 0022-3646
- Page Range / eLocation ID:
- p. 79-84
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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Batrachospermum was shown to be paraphyletic. Subsequently, sections of the genus have been methodically investigated usingDNA sequences and morphology in order to propose new genera and delineate species.Batrachospermum sectionTurfosa is the last section with multiple species yet to be examined. New sequence data of specimens from Europe and the United States were combined with the sparse sequence data already available. Phylogenetic analyses usingrbc L andCOI ‐5P sequences showed this section to be a well‐supported clade, distinct fromBatrachospermum sectionBatrachospermum and its segregate genera. SectionTurfosa is raised to the generic rank asPaludicola gen. nov. Substantial genetic variation within the genus was discovered and 12 species are recognized based onDNA sequence data as well as morphological characters and geographic distribution. The following morphological characters were applied to distinguish species: branching pattern (pseudodichotomous or irregular), whorl size (reduced or well developed), primary fascicles (curved or straight), spermatangia origin (primary or secondary fascicles), and carposporophyte arrangement (loose or dense). Previously published species were transferred to the new genus:P. turfosa ,P. keratophyta ,P. orthosticha ,P. phangiae, andP. periploca . Seven new species are proposed as follows:P. groenbladii from Europe;P. communis ,P. johnhallii , andP. leafensis from North America; andP. aquanigra ,P. diamantinensis , andP. turfosiformis from Brazil. In addition, three unsequenced species in the section,P. bakarensis ,P. gombakensis , andP. tapirensis , were transferred to the new genus. -
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The freshwater red algal order Thoreales has triphasic life history composed of a diminutive diploid “Chantransia” stage, a distinctive macroscopic gametophyte with multi‐axial growth and carposporophytes that develop on the gametophyte thallus. This order is comprised of two genera,
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E. gracilipes andE. cataractarum as the closest wild relatives of the coca taxa, but understanding the domestication history of this crop will require more thorough phylogeographic analysis.
