Spinocosmarium Prescott & A.M.Scott, 1942
Lectotype species: Spinocosmarium quadridens (H.C.Wood) Prescott & A.M.Scott
Original publication: Prescott, G.W. & Scott, A.M. (1942). The freshwater algae of Southern United States. I. Desmids from Mississippi, with descriptions of new Species and varieties. Transactions of the American Microscopical Society 61(1): 1-29.
Request PDFType designated in: Guiry, M.D. (2013). Taxonomy and nomenclature of the Conjugatophyceae (=Zygnematophyceae). Algae. An International Journal of Algal Research 28: 1-29.
Description: Cells solitary, compressed (biradiate), with deep median constriction (isthmus) where semicell walls overlap. Each semicell with laterally directed, simple or furcate spines. The type species also may have 1 or 2 spines at each angle of flattened semicell apex. Semicell faces usually with many simple to emarginate warts, often disposed in vertical and horizontal rows. Each semicell with single chloroplast with central pyrenoid. Nucleus in isthmus. Little known regarding reproduction: asexual reproduction by cell division typical of Cosmarium-type desmids assumed. Sexual reproduction not observed.
Information contributed by: J.F. Gerrath & M.D. Guiry. The most recent alteration to this page was made on 2013-09-12 by M.D. Guiry.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
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: Spinocosmarium is endemic to North America, usually in acidic, oligotrophic lakes and ponds; S. quadridens is widespread, S. laconiense is restricted to north-eastern U.S.A. and eastern Canada.
Verification of Data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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=47157
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 12 September 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 05 December 2024
