Johannesbaptistia G.De, 1934
Holotype species: Johannesbaptistia primaria (N.L.Gardner) G.De Toni
Original publication and holotype designation: De Toni, G. (1934). Noterelle di nomenclatura algologica. I. Alcuni casi di omonimia (Missoficee). pp. . Brescia: Privately published.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Komárek, J., Kastovsky, J., Mares, J. & Johansen, J.R. (2014). Taxonomic classification of cyanoprokaryotes (cyanobacterial genera) 2014, using a polyphasic approach. Preslia 86: 295-335.
Substitute name for Cyanothrix, N.L.Gardner 1927; priority for Cyanothrix W. Schmidle, 1897. - (26 Jul 2013) - M.D. Guiry
Description: Unicellular-pseudofilamentous; pseudofilaments free-living or in small groups, solitary, cylindrical, to more than 1 mm long, uniseriate, very rarely pseudodichotomously divaricated and again joined, composed of the simple row of "transversely elongated", more or less discoid cells, which are oriented by their "longer" axis crosswise to the axis of pseudofilaments and of the enveloping sheath. Sheaths gelatinous, colorless, not layered, fine, thin to slightly widened from cells and sometimes diffluent at the margin. Cells slightly or clearly distant from one another, only after division the daughter cells remain joined for a short time; divarication starts after the shift of one daughter cell from the original direction of pseudofilament and by the following division of both daughter cells. Cell content pale blue-green or olive-green, homogeneous or finely granular. Cell division only in one plane in succeeding generations, always crosswise to the axis of pseudofilaments, i.e., crosswise to the shorter axis of cells. Reproduction probably by fragmentation of pseudofilaments. Found several times; only type species studied. J. pellucida,/u> occurs in metaphyton of unpolluted swamps, small water bodies with plenty of submerged vegetation and littorals of stagnant waters, all over the tropical regions and in warmer areas of the northern temperate zone. Other species have similar ecology, one species was described from therma1 springs in Yellowstone Park (USA). A poorly known genus, revision from cultures is necessary.
Information contributed by: J. Komárek. The most recent alteration to this page was made on 30 Sep 2015 by M.D. Guiry.
Numbers of names and species: There are 7 species names in the database at present, as well as 1 infraspecific names. Of the species names, 5 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.
Komárek, J. (2003). Coccoid and colonial cyanobacteria. In: Freshwater Algae of North America. Ecology and Classification. (Wehr, J.D. & Sheath, R.G. Eds), pp. 59-116. Amsterdam Boston London New York Oxford Paris San Diego San Fransisco Singapore Sydney Tokyo: 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: 22 February 2001 by M.D. Guiry
Verified by: 05 March 2015 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43301
Please cite this record as:
M.D. 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 13 December 2019.