Amylax Meunier, 1910
Holotype species: Amylax lata Meunier
Original publication and holotype designation:Meunier, A. (1910). Microplancton des Mers de Barents et de Kara. Duc d'Orleans, Campagne Arctique de 1907 : 1-355, Atlas of pls I-XXXVII.
Taxonomic status: currently recognized as a distinct genus.
Description: Dorsoventrally compressed unicellular biflagellated heterodynamic medium-sized ( 40-75 µm long) cells with a cell wall composed of cellulosic thecal plates. Plate formula Po, 3', 3a, 6", 6c, 7-8s, 6"', 1p, 1"". Plate 1' with ventral pore at it's right side near the posterior end. Cells with distinct apical horn and 2 to several antapical spines. Nucleus elongated, banana-shaped. Chloroplasts present but at least in A. triacantha with phycobilin fluorescence, apparently not of the typical dinophycean type; so far no ultrastructural investigations available.
Comments: Habitat : Marine to brackish waters mainly of cold, temperate waters. Meunier (1910) described the genus with Amylax lata as type species. This is apparently a later taxonomical synonym of Gonyaulax triacantha Jörgensen 1899. Kofoid transferred it into the genus Heterodinium Kofoid but in a later paper transferred it back into Gonyaulax. This was followed by most authors until Balech (1977) proposed that the type species of Amylax is a synonym of Gonyaulax triacantha Jörgensen. Sournia (1984) formally introduced the new combination Amylax triacantha. The other species, Meunier (1910) assigned to Amylax are now transferred to Gonyaulax or other related genera.
NCBI Nucleotide Sequences
Numbers of names and species: There are 8 species (and infraspecific) names in the database at present, of which 4 have been flagged as currently accepted taxonomically.
Names: ('C' indicates a name that is currently 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):
Amylax buxus (Balech) J.D.Dodge C
Amylax catenata (Levander) Meunier S
Amylax diacantha Meunier S
Amylax lata Meunier C - type
Amylax nivicola Meunier P
Amylax perpusilla Meunier P
Amylax triacantha (Jorgensen) Sournia C
Amylax verrucosa Rampi C
Steidinger, K.A. & Tangen, K. (1996). Dinoflagellates. In: Identifying Marine Phytoplankton. (Tomas, C.R. Eds), pp. 387-584. San Diego: Academic Press.
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: http://www.algaebase.org/search/genus/detail/?genus_id=44614
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 13 December 2013.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:6373