Haplotaenium Bando, 1988
Holotype species: Haplotaenium minutum (Ralfs) Bando
Original publication and holotype designation: Bando, T. (1988). Haplotaenium, a new genus separated from Pleurotaenium (Desmidiaceae, Chlorophyta). Journal of Japanese Botany 63(5): 169-178, 4 figures.
Request PDFPrecise date of publication: May 20 1988
Description: Cell solitary, elongate-cylindrical with shallow median constriction (isthmus) where semicell walls overlap. Semicells with slight basal swelling and smooth, truncate apex. Cell apex without terminal vacuole. Cell wall appearing smooth or finely porose. Chloroplast two per cell, each an axial band or with irregular laminae, with central row of 2-15 pyrenoids. Nucleus in isthmus. Asexual reproductin by cell division and new semicell morphogenesis typical of Cosmarium-type desmids (see Cosmarium). Sexual reproduction by conjugation. Gametes fuse between gametangia; zygospores globose, smooth or with obtuse conical protruberances. Karyogamy prior to zygospore germination, followed by meiosis.
Information contributed by: J.F. Gerrath. The most recent alteration to this page was made on 2018-03-26 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 neuter.
Most recent taxonomic treatment adopted: Guiry, M.D. (2013). Taxonomy and nomenclature of the Conjugatophyceae (=Zygnematophyceae). Algae. An International Journal of Algal Research 28: 1-29.
Comments: Two species widespread, usually in acidic, oligotrophic lacustrine environments or in swamps.
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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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=44292
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 26 March 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 30 November 2024
