Dasyella Falkenberg, 1901
Holotype species: Dasyella gracilis Falkenberg
Original publication and holotype designation: Falkenberg, P. (1901). Die Rhodomelaceen des Golfes von Neapel und der angrenzenden Meeres-Abschnitte Heraus gegeben von der zoologischen Station zu Neapel. Fauna und Flora des Golfes von Neapel, Monographie 26. pp. i-xvi, 1-754, 10 figs, 24 pls. Berlin: Verlag von R. Friedländer & Sohns.
Request PDFDescription: Thallus erect, sympodially developed, subdichotomously or alternately distichously branched. Axial cells surrounded by three unequal sized tiers of 4 periaxials without cortication. Proximal tier of periaxials in each segment narrowest in diam., distal tier broadest, allowing for easy distinction of the axial segments and giving the axes uneven appearances. Indeterminate axes terete to squarish and alternately and distichously producing determinate pseudolateral branch systems at intervals of 2-4 axial tiered segments. Pseudolaterals pigmented, endogenously derived from axial cells and emerging from distal tiers of transversely divided periaxial cells. Pseudolaterals monosiphonous throughout except for polysiphonous basal segments, several times subdichotomously branched from every second cell. Secondary sympodia produced from the second basal segment of pseudolaterals, narrow at the point of origin and expanding above, producing pseudolaterals from every 5-9 axial tiered segments below, 2-4 above. One or rarely 2, unicellular or multicellular, unbranched rhizoids issued at right angles from lower periaxial cells of main axes.
Procarps and auxiliary cells formed on basal segments of pseudolaterals which continue development after the fertile axes form. Carposporophytes surrounded by large, corticated pericarps with lateral, unobvious ostioles, subtending pseudolaterals and often secondary sympodia, the bases of which become incorporated into the pericarps. Spermatangia unknown. Single tetrahedral sporangia produced in successive segments forming linear-lanceolate stichidia with simple or branched monosiphonous tips. Stichidia sessile, replacing primary sympodial axes (not pseudolaterals) or rarely terminal on secondary sympodia. Tetrasporangia completely enclosed by cover cells at maturity.
Information contributed by: C.W. Schneider. The most recent alteration to this page was made on 2023-12-07 by M.D. Guiry.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
Most recent taxonomic treatment adopted: Cormaci, M., Furnari, G., Alongi, G. & Serio, D. coautrice per le Ceramieae (2023). Flora marina bentonica del Mediterraneo: Rhodophyta - Rhodymeniophycidae III: Ceramiales I (RHODOMELACEAE escluse). Bollettino Accademia Gioenia di Scienze Naturali in Catania 56(386): 81-621, 109 pls.
Comments: A rare, deep-water subtidal genus known from only two collections off the Mediterranean coasts of France and Italy.
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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=38820
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 07 December 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024
