Redefining Chlorobotryaceae as one of the principal and most diverse lineages of eustigmatophyte algae

Barcytė, Dovilė; Zátopková, Martina; Němcová, Yvonne‬; Richtář, Michal; Yurchenko, Tatiana; Jaške, Karin; Fawley, Karen P.; Škaloud, Pavel; Ševčíková, Tereza; Fawley, Marvin W.; Eliáš, Marek

doi:10.1016/j.ympev.2022.107607

Cited by 5 publications

(9 citation statements)

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“…For example, we recovered Olisthodiscophyceae with full statistical support as a lineage sister to Pinguiophyceae. This relationship has previously only been seen with low to moderate support in trees based on datasets of concatenated plastid genome-encoded proteins (Barcytė et al 2021; Barcytė et al 2022). Likewise, we have full support for the coccoid alga “ Botrydiopsis ” pyrenoidosa to represent an independent class-level lineage, sister to Phaeophyceae and Schizocladiophyceae, instead of being nested in the class Xanthophyceae (where it is formally classified together with genuine members of the genus Botrydiopsis ).…”

Section: Resultsmentioning

confidence: 91%

Multiple plastid losses within photosynthetic stramenopiles revealed by comprehensive phylogenomics

Terpis,

Salomaki,

Barcytė

et al. 2024

Preprint

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Ochrophyta is a vast and morphologically diverse group of algae with complex plastids, including familiar taxa with fundamental ecological importance (diatoms or kelp), and a wealth of lesser-known and obscure organisms. The sheer diversity of ochrophytes poses a challenge for reconstructing their phylogeny, with major gaps in sampling and an unsettled placement of particular taxa yet to be tackled. We sequenced transcriptomes from 25 strategically selected representatives and used these data to build the most taxonomically comprehensive ochrophyte-centered phylogenomic supermatrix to date. We employed a combination of approaches to reconstruct and critically evaluate the relationships among ochrophytes. While generally congruent with previous analyses, the updated ochrophyte phylogenomic tree resolved the position of several taxa with previously uncertain placement, and supported a redefinition of the class Synchromophyceae. Our results indicated that the heterotrophic plastid-lacking heliozoanActinophrys solis not a sister lineage of ochrophytes, as proposed recently, but rather phylogenetically nested among them. In addition, we foundPicophagus flagellatusto be a secondarily heterotrophic ochrophyte lacking all hallmark plastid genes, yet exhibiting mitochondrial proteins that seem to be genetic footprints of lost plastid organelle. We thus document, for the first time, plastid loss in two separate ochrophyte lineages. Altogether, our study provides a new framework for reconstructing trait evolution in ochrophytes and demonstrates that plastid loss is more common than previously thought.Issue Section:Discoveries

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Section: Resultsmentioning

confidence: 91%

Multiple plastid losses within photosynthetic stramenopiles revealed by comprehensive phylogenomics

Terpis,

Salomaki,

Barcytė

et al. 2024

Preprint

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“…Many new generic names for diatoms were introduced from the 1970s onward as more taxonomically useful morphological characters become apparent under SEM and were assessed in relation to phylogenetic data. The Rhodophyta, similarly, have rich, complex reproductive systems that facilitate phylogenetic hypotheses, although recent molecular studies are revealing even more variation at the genus level, particularly in the Ceramiales (e.g., Barros-Barreto et al, 2023).…”

Section: How Many Species Are There?mentioning

confidence: 99%

“…The most species‐rich classes are the Chlorophyceae and Ulvophyceae with nearly the same number of genera (Table 4). The Chlorodendrophyceae Masjuk, 2006 (a typified name, Chlorodendron Senn; see Barcyte et al., 2022), Chloropicophyceae Lopes dos Santos & Eikrem, 2017, a typified name (T: Chloropicon Lopes dos Santos & Eikrem), Chuariophyceae Gnilovskaya & Ischenko (in Gnilovskaja et al., 1988, as “Chuariaphyceae,” apparently extinct; a typified name, T: Chuaria C.Walcott), Mamiellophyceae Marin & Melkonian, 2010 (a typified name, T: Mamiella Moestrup), Nephroselmidophyceae T. Nakayama et al., 2007 (a typified name, T: Nephroselmis F.Stein), Pedinophyceae Moestrup, 1991 (a typified name, T: Pedinomonas Korshikov in Isachenko, 1921), Picocystophyceae Eikrem & Lopes dos Santos in Lopes dos Santos et al., 2017 (a typified name, T: Picocystis R.A.Lewin), and Pyramimonadophyceae Moestrup & Daugbjerg (in Daugbjerg et al., 2019, a typified name, T: Pyramimonas Schmarda) are relatively recent, small segregate classes suggesting perhaps that others will be found.…”

Section: Chlorophytamentioning

confidence: 99%

“…The most species-rich classes are the Chlorophyceae and Ulvophyceae with nearly the same number of genera (Table4). The ChlorodendrophyceaeMasjuk, 2006 (a typified name, Chlorodendron Senn; seeBarcyte et al, 2022), Chloropicophyceae Lopes dos Santos & Eikrem, 2017, a typified name (T: Chloropicon Lopes CHROMERIDOPHY TA The phylum Chromeridophyta R.B.Moore et al, 2008 (as "Chromerida phyl. nov."; Table 2) is a small phylum that includes some marine photosynthetic species.…”

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How many species of algae are there? A reprise. Four kingdoms, 14 phyla, 63 classes and still growing

Guiry

2024

Journal of Phycology

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To date (1 November 2023), the online database AlgaeBase has documented 50,589 species of living algae and 10,556 fossil species here referred to four kingdoms (Eubacteria, Chromista, Plantae, and Protozoa), 14 phyla, and 63 classes. The algae are the third most speciose grouping of plant‐like after the flowering plants (≈382,000 species) and fungi (≈170,000 species, including lichens) but are the least well defined of all the botanical groupings. Priority is given to phyla and class names that are familiar to phycologists and that are nomenclaturally valid. The most species‐rich phylum is the Heterokontophyta to which 18 classes are referred with 21,052 living species and which is dominated by the diatoms in three classes with 18,673 species (16,427 living; 2239 fossil). The next most species‐rich phyla are the red algae (7276 living), the green algae (6851 living), the blue‐green algae (Cyanobacteria, 5723 living), the charophytes (4950 living, including the Charophyceae, 511 species living, and the Zygnematophyceae, 4335 living species), Dinoflagellata (2956 living, including the Dinophyceae, 2828 extant), and haptophytes (Haptophyta 1722 species, 517 living).

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“…Classification of organisms has become exciting again, especially when common ground between the two eras is found. In some cases, the re‐definition of a taxon may simply be enough (Barcytė et al, 2022), while in others, novel higher‐rank taxa emerge and deserve formal recognition (Barcytė et al, 2021; Li et al, 2020; Muñoz‐Gómez et al, 2017). This latter scenario is what applies to the the enigmatic red algal class Cyanidiophyceae revised recently by Park et al (2023) and highlighted here.…”

Section: Figurementioning

confidence: 99%

Extremophilic red algae reordered

Barcytė

2023

Journal of Phycology

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Redefining Chlorobotryaceae as one of the principal and most diverse lineages of eustigmatophyte algae

Cited by 5 publications

References 68 publications

Multiple plastid losses within photosynthetic stramenopiles revealed by comprehensive phylogenomics

Multiple plastid losses within photosynthetic stramenopiles revealed by comprehensive phylogenomics

How many species of algae are there? A reprise. Four kingdoms, 14 phyla, 63 classes and still growing

Extremophilic red algae reordered

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