Lectotype species: Chroodactylon wolleanum Hansgirg
Original publication:Hansgirg, A. (1885). Ein Beitrag zur Kenntniss von der Verbreitung der Chromatophoren und Zellkernen bei den Schizophyceen (Phycochromaceen). Berichte der deutsche botanischen Gesellschaft 3: 14-22.
Type designated in Drew, K.M. & Ross, R. (1965). Some generic names in the Bangiophycidae. Taxon 14: 93-99.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Yoon, H.S., Nelson, W., Lindstrom, S.C., Boo, S.M., Pueschel, C., Qiu, H. & Bhattacharya, D. (2016). Rhodophyta. In: Handbook of the Protists. (Archibald, J.M, Simpson, A.G.B. & Samovits, C.H. Eds), pp. [1-45]. Cham, Switzerland: Springer International Publishing.
Description: False-branched pseudofilaments of globose or elliptical cells enclosed in a broad, gelatinous sheath and arranged in an irregular uniseriate manner. Each cell with a blue-green stellate, axial plastid and prominent pyrenoid. Cell diam. 3-16 µm, length 6-20 µm. Strong linear correlation between false branch number and filament length (ca. 1 branch per 200 µm length). Maximum filament length reported 1020 µm in Lake Ontario populations. Reproduction by monospores and fragmentation. No sexual reproduction observed
Information contributed by: R.G. Sheath. The most recent alteration to this page was made on 6 Feb 2017 by M.D. Guiry.
Comments: Widespread epiphyte in temperate and tropical marine and freshwater environments. Freshwaters largely alkaline: specific conductance 170-540 mS cm-1 and pH 7.8-8.5. A marine isolate (Asterocytis ornata) changed from filamentous in full-strength seawater to unicellular or bicellular form closely resembling Chroothece in quarter-strength seawater. Population in Lake Huron (Asterocytis smarqdina) exhibited luxury storage of phosphorus, as indicated by polyphosphate body accumulation.
Numbers of names and species: There are 5 species names in the database at present, as well as 1 infraspecific names. Of the species names, 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.
Kumano, S. (2002). Freshwater red algae of the world. pp. [i-ii], i-xiv, 1-375 [p. 375 is an Addendum], pls 1-199. Bristol: Biopress Limited.
Sheath, R.G. (2003). Red Algae. In: Freshwater Algae of North America, Ecology & Classification. (Wehr, J.D. & Sheath, R.G. Eds), pp. 197-224. San Diego: Academic Press.
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: 28 December 2000 by M.D. Guiry
Verified by: 06 February 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=32931
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 26 October 2021.