Yamadaella I.A., 1970
Holotype species: Yamadaella caenomyce (Decaisne) I.A.Abbott
Original publication and holotype designation: Abbott, I.A. (1970). Yamadaella, a new genus in the Nemaliales (Rhodophyta). Phycologia 9: 115-123, 9 figs.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.
Description: Thalli (gametophytes) epilithic, dichotomously to irregularly branched, attached to the substratum by a discoid holdfast and several secondary holdfasts. Axes terete, mostly of uniform diameter with attenuate apices, calcified, calcification confined to the cortical filaments. Structure multiaxial, medulla of longitudinal filaments, cortex of pseudodichotomously divided anticlinal filaments with occasional rhizoidal filaments from basal cells. Apical cells of cortical filaments wedge-shaped or clavate, proximal cells pyriform, lower cells cylindrical. Monoecious. Spermatangia in sori, borne singly or in pairs on paired or verticillate one-celled branches arising on penultimate cells of cortical filaments. Carpogonial branch borne on the basal cell of a cortical filament in a distal position adjacent to the vegetative cells of the subsequent dichotomy, three-celled. Following presumed fertilization zygote cutting of several lateral gonimoblast initials, forming diffuse branch systems with terminal carposporangia. Carposporangia quadripartite, with cruciately or decussately arranged spores, or undivided. Gonimoblast filaments of mature cystocarps intermingling with cortical filaments. Fusion cells formed from cells of the carpogonial branch. Tetrasporophyte unknown.
Information contributed by: John Huisman. The most recent alteration to this page was made on 23 Jul 2015 by Wendy Guiry.
Numbers of names and species: There are 3 species names in the database at present, of which 3 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..
Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):
Click here to also show infraspecific names in the list below.
Lin, S.-M., Rodríguez-Prieto, C., Huisman, J.M., Guiry, M.D. Payri, C., Nelson, W.A. & Liu, S.-L. (2015). A phylogenetic re-appraisal of the family Liagoraceae sensu lato (Nemaliales, Rhodophyta) based on sequence analyses of two plastid genes and post-fertilization development. Journal of Phycology 51(3): 546-559.
Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
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.
Created: 01 January 2001 by M.D. Guiry
Verified by: 23 July 2015 by Wendy Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=39084
Please cite this record as:
Wendy Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 20 October 2019.