Heterosaundersella Tokida, 1942
Holotype species: Heterosaundersella hattoriana Tokida
Currently accepted name for the type species: Saundersella hattoriana (Tokida) H. Kawai & Hanyuda
Original publication and holotype designation: Tokida, J. (1942). Phycological observations, V. Transactions of the Sapporo Natural History Society 17: 82-95.
Request PDFDescription: Plants epiphytic on other algae in intertidal zone. Erect thallus composed of prostrate part and erect part. Prostrate part composed of the filaments penetrating inside the host plant and dense assimilatory filaments arising from them. Erect part of thallus filiform, simple, caespitose, up to 5 cm in length and 5 mm in diameter when dried, flaccid, gelatinous, yellowish brown in color, haplostichous composed of multiaxial colorless central medullary filaments of up to 30 _m in diameter, and pigmented assimilatory filaments of 2-8 cells long. Terminal cells of assimilatory filaments large and swollen, spherical or obovate. Cells next to terminal cells at times also swollen, however, the cells below them cylindrical and isodiametric. Plurilocular sporangia formed on prostrate thalli, linear, uniseriate, at times partly biseriate, 10 cells long. Unilocular sporangia formed on erect thalli, at times on prostrate part as well, at the end of medullary cells or at the base of assimilatory filaments, obovate or irregular in shape, sessile, up to 45 _m ( 25 _m in length and diameter. Phaeophycean hairs present on erect and prostrate part of thalli. Cells of the thallus contain several discoid chloroplasts with pyrenoids. Closely related to Saundersella, distinguished from it in the dimorphism between erect thalli forming unilocular sporangia and prostrate thalli forming plurilocular sporangia, smaller size and softer texture and thinner central filaments. Unispores typically biflagellated, pear-shaped containing a chloroplast with a stigma, germinate into prostrate branched filaments developing into bushy microthalli forming plurilocular sporangia.
Information kindly contributed by H. Kawai but may now be outdated.
Taxonomic status: This name is currently regarded as a synonym of Saundersella.
Most recent taxonomic treatment adopted: Kawai, H., Watanabe, Y. & Hanyuda, T. (2021). Taxonomic revision of Saundersella (Ectocarpales s.l., Phaeophyceae) from the northwestern Pacific with description of Saundersella crassa sp. nov. and transfer of Heterosaundersella hattoriana to Saundersella. Phycologia 60(3): 274-281.
Comments: Distributed in cold water area of western Pacific Ocean and Okhotsk Sea. On Japanese coast, obligate epiphyte of Analipus. Summer annual.
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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.
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Citing AlgaeBase
Cite this record as:
G.M. Guiry in Guiry, M.D. & Guiry, G.M. 11 August 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 26 April 2024
