Amphisolenia Stein, 1883

Holotype species: Amphisolenia globifera F.Stein

Original publication: Stein, F. (1883). Die naturgeschichte der arthrodelen Flagellaten. In: Der Organismus der Infusionstiere. III. Pt. 2. ( Eds), pp. 1-30. Leipzig:

Type designated in: Kofoid, C.A. & Skogsberg, T. (1928). The Dinoflagellata: the Dinophysoidae [No.] XXXV. Reports on the scientific results of the expedition to the Eastern Tropical Pacific, in charge of Alexander Agassiz, by the U.S. Fish Commission Steamer "Albatross" from October 1904 to March 1905, Lieut. Commander L.M. Garrett, U.S.N., Commanding. . Memoirs of the Museum of Comparative Zoölogy, at Harvard College, Cambridge, Mass. 51: 1-766.

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Description: Needle-like large (150-500 &m) flagellate divided in "head", that is the very reduced epicone, separated by a cingulum with narrow cingular lists, the "neck", that is the region of the sulcus with narrow lists and the "body", a swollen part of the hypocone which continues into the "tail", the distal part of the very large hypocone which may be bifurcated or multifurcated. In most species, the epicone is inclined in respect to the longitudinal axis of the hypocone, the cingulum is circular or only slightly displaced. The sulcus starts at the cingulum and extends only partly on the hypocone and ends before the hypocone forms the "body". The plate formula is identical to that of Dinophysis Stein but 2 sulcal plates are extremely elongated, forming the ventral side of the "neck". Chloroplast of various color have been described in several species but ultrastructural investigations showed that apparently these are not dinoflagellate chloroplasts but endosymbionts. At least 2 types of endosymbionts have been reported, a eukaryotic and a prokaryotic one. The exact nature and function of the symbionts is so far unknown. Sexual reproduction and cyst formation not known. Marine plankton, worldwide, mostly tropical and subtropical, a few species in temperate waters.

Information contributed by: M. Elbrächter. The most recent alteration to this page was made on 2017-05-24 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Most recent taxonomic treatment adopted: Kawai, H. & Nakayama, T. (2015). Introduction (Heterokontobionta p.p.), Cryptophyta, Dinophyta, Haptophyta, Heterokontophyta (except Coscinodiscophyceae, Mediophyceae, Fragilariophyceae, Bacillariophyceae, Phaeophyceae, Eustigmatophyceae), Chlorarachniophyta, Euglenophyta. In: Syllabus of plant families. Adolf Engler's Syllabus der Pflanzenfamilien. Ed. 13. Phototrophic eukaryotic Algae. Glaucocystophyta, Cryptophyta, Dinophyta/Dinozoa, Haptophyta, Heterokontophyta/Ochrophyta, Chlorarachnniophyta/Cercozoa, Chlorophyta, Streptophyta p.p. (Frey, W. Eds), pp. 11-64, 103-139. Stuttgart: Borntraeger Science Publishers.

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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=44613

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 24 May 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 21 May 2024

 
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