Acinetospora, 1891: 370
Holotype species: Acinetospora pusilla (Griffiths ex Harvey) De Toni
Currently accepted name for the type species: Acinetospora crinita (Carmichael) Sauvageau
Original publication and holotype designation:Bornet, E. (1891). Note sur quelques Ectocarpus. Bulletin de la Société Botanique de France 38: 353-372.
Taxonomic status: currently recognized as a distinct genus.
Description: The upright filaments are uniseriate usually with meristematic zones near the base. Branching is often hypomeristematic and formation of plurilocular sporangia occurs by transformation of hypomeristematic laterals giving rise to sessile or shortly stalked sporangia. Unilocular sporangia are sessile or provided with a short stalk. Ovoid monosporangia have been reported by Sauvageau (1899). Short laterals - "crampons" in French literature - are present. The life history of the type species is not fully understood. Kornmann (1953) reported on presumably diploid plants with plurilocular and unilocular sporangia. The swarmers from the plurilocular sporangia function as zoospores; they are large, up to 38 _m long and 20 _m broad with limited motility probably due to reduced length of the flagella. The swarmers from the unilocular sporangia develop into plants similar to the sporophyte. At fertility they also carry plurilocular sporangia with large loculi (zoosporangia) and sporangia with small loculi (gametangia?). However, sexual reproduction has not been observed, and there is no karyological evidence to support that meiosis occurs in the unilocular sporangia. Müller (1986) reported on apomeiotic unilocular sporangia and the loss of sexual reproduction could be responsible for the establishment of geographically isolated populations and the great specific variability within the genus. Knoepffler-Péguy (1977) convincingly showed that Acinetospora and Feldmannia cannot be separated as these "genera" represent morphological expressions under control of environmental conditions. Acinetospora has priority.
NCBI Nucleotide Sequences
Numbers of names and species: There are 9 species (and infraspecific) names in the database at present, of which 2 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):
Acinetospora crinita (Carmichael) Sauvageau C
Acinetospora nicholsoniae Hollenberg C
Acinetospora pusilla (Griffiths ex Harvey) De Toni S - type
Acinetospora pusilla var. crinita (Carmichael) Batters S
Acinetospora pusilla var. codii (Sauvageau) Sauvageau P
Acinetospora pusilla var. riparia (Sauvageau) Sauvageau P
Acinetospora pusilla var. thuretii (Sauvageau) Bornet P
Acinetospora pusilla var. typica (Sauvageau) Sauvageau P
Acinetospora vidovichii (Meneghini) Sauvageau S
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=32852
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 11 December 2013.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:8336