Journal
PROTIST
Volume 171, Issue 6, Pages -Publisher
ELSEVIER GMBH
DOI: 10.1016/j.protis.2020.125781
Keywords
Chrysomeris; Chrysoparadoxophyceae; Nematochrysis; Phaeosaccion; Tetrasporopsis
Categories
Funding
- Collaborative Genome Program of the Korea Institute of Marine Science and Technology Promotion (KIMST) - Ministry of Oceans and Fisheries (MOF) [20180430]
- National Research Foundation of Korea [NRF-2017R1A2B3001923, 2020R1C1C1008173]
- Next-generation BioGreen2l Program from the RDA (Rural Development Administration), Korea [PJ01389003]
- National Science Foundation [DEB -0936884, 1317114, DEB -9419498, EF 08-27023]
- UK Natural Environment Research Council [2025 WP 4.5, NE/D521522/1, NE/J023094/1, CGS -70]
- Marine Alliance for Science and Technology for Scotland pooling initiative
- Scottish Funding Council [HR09011]
- NERC [NE/D521522/1, NE/J023094/1] Funding Source: UKRI
- National Research Foundation of Korea [2020R1C1C1008173] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The relationships among the Aurearenophyceae, Phaeothamniophyceae, Phaeophyceae and Xanthophyceae lineages of the Heterokontophyta SI Glade are not well known. By adding previously unexamined taxa related to these classes in a five gene phylogeny (SSU rRNA, atpB, psaA, psaB, rbcL), we recovered an assemblage of taxa previously unrecognized. We propose the class Phaeosacciophyceae class. nov., that includes Phaeosaccion collinsii, Phaeosaccion multiseriatum sp. nov., Phaeosaccion okellyi sp. nov., Antarctosaccion applanatum, Tetrasporopsis fuscescens, Tetrasporopsis moei sp. nov., and Psammochrysis cassiotisii gen. & sp. nov. We re-examine the literature for Chrysomeris, Nematochrysis, Chrysowaernella and the invalid name Giraudyopsis and conclude some taxa in previous studies are misidentified or misnamed, i.e. Chrysomeris and Chrysowaernella, respectively. We also show that Nematochrysis sessilis var. vectensis and Nematochrysis hieroglyphica may belong in the recently described class Chrysoparadoxophyceae. The phylogenetic relationships of Phaeobotrys solitaria and Pleurochloridella botrydiopsis are not clearly resolved, but they branch near the Xanthophyceae. Here we describe a new class Phaeosacciophyceae, a new order Phaeosacciales, a new family Tetrasporopsidaceae, a new genus Psammochrysis and four new species.
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