Pegethrix Mai, J.R.Johansen & Bohunická, 2018

Holotype species: Pegethrix bostrychoides Mai, J.R.Johansen & Bohunická

Original publication and holotype designation: Mai, T., Johansen, J.R., Pietrasiak, N., Bohunická, M. & Martin, M.P. (2018). Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species. Phytotaxa 365(1): 1-59, 23 figures, 14 tables.

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Description: Filaments mostly solitary, at times with multiple hormogonia in a common sheath, or with loose nodule formation, with infrequent double and single false branching. Sheath clear, thin and firm to soft and widened, but never diffluent. Trichomes straight, flexuous, or entangled within a sheath into a loose nodule, sometimes spirally coiled, slightly constricted at the crosswalls, with slow gliding motility observed in trichomes lacking sheath, not tapered. Cells mostly shorter than wide, becoming isodiametric to slightly longer than wide before division, without aerotopes, sometimes with granules in cytoplasm; with parietal thylakoids. Apical cells rounded, without calyptra. Involution cells with axillary bud-like structures rare. Reproduction by trichome fragmentation via disintegration at necridia or without the presence of necridia.

Information contributed by: Orginal description. The most recent alteration to this page was made on 2023-03-03 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as feminine.

Most recent taxonomic treatment adopted: Strunecký, O., Ivanova, A.P. & Mares, J. (2022 '2023'). An updated classification of cyanobacterial orders and families based on phylogenomic and polyphasic analysis (Review). Journal of Phycology 59(1): 12-51.

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=52580

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 03 March 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 05 October 2024