Sonderella F.Schmitz, 1897
Holotype species: Sonderella linearis (Harvey) F.Schmitz
Original publication and holotype designation: Schmitz, F. & Falkenberg, P. (1897). Rhodomelaceae. In: Die natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten insbesondere den Nutzpflanzen unter Mitwirkung zahlreicher hervorragender Fachgelehrten, Teil 1, Abteilung 2. (Engler, A. & Prantl, K. Eds), pp. 421-480. Leipzig: verlag von Wilhelm Engelmann.
Request PDFDescription: Upright polysiphonous thallus, up to 16 cm tall, an obligate epiphyte on Ballia; attached by corticating rhizoidal filaments at base of axis. Thallus laminate, linear, up to 4 mm broad, margins entire; branching mostly from midrib which is corticated in older plants. Alae usually 1 layer thick, cells often hexagonal in surface view. Apical cell in a depression; two lateral pericentral cells each initiate a single pseudopericentral cell on abaxial side, lateral pericentrals then divide longitudinally forming two elongate cells that each initiates a chain of shorter cells that grow into filaments laterally fused with similar adjacent filaments to form alae on either side of the axis. Axial cells form 2 additional pericentrals on adaxial side; mature axis having 4 pericentral cells and 2 pseudopericentral cells surrounding each axial cell. Branching occurs endogenously, initiated by either adaxial pericentral cell or one of the pseudopericentrals. Reproductive structures on bladelets formed on the midrib, but occasionally marginal. Male capitula flat, ovate, 2-5 x 1-4mm; all lateral cells except 1-3 marginal ones, a terminal group and 2 central rows produce spermatangia. Fertile female bladelets form procarps only on the adaxial side, presumably in the positions of potential trichoblasts, up to 10 or more per bladelet; 1 or rarely 2 cystocarps develop on a bladelet, having an urceolate form and a relatively thick, 4-layered wall. Tetrasporangial stichidia 2-6 x 0.5-1 mm, tapering at each end; tetrasporangia in 2 rows, formed from 2 of 3 adaxial pericentral cells; 4-6 cover cell cells are present over each sporangium.
Information contributed by: R.E. Norris. The most recent alteration to this page was made on 2010-10-07 by M.D. Guiry.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
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.
Comments: An obligate epiphyte on Ballia callitricha, known only from South Australia east into Victoria.
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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=42880
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 07 October 2010. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 April 2024
