Lamprothamnium J.Groves, 1916

Holotype species: Lamprothamnium papulosum (Wallroth) J.Groves

Original publication and holotype designation: Groves, J. (1916). On the name Lamprothamnus Braun. Journal of Botany, London 54: 336-337.

Precise date of publication: Nov. 1916

Description: Monoecious or dioecious. Plant axis ecorticate, usually narrower than the branchlets. Stipulodes in one whorl (haplostephanous), usually distinctively downward pointing, branchlets ecorticate, bract cells verticillate. Gametangia on the branchlet nodes or arranged internal or external to the axis node at the base of the branchlets. Where conjoined the antheridium usually above the oosporangium. Helical cells of the oosporangium terminated by a coronula of five cells. Oospores with a calcified covering (gyrogonite).

Information contributed by: Casanova & Karol (2023). The most recent alteration to this page was made on 2023-06-16 by E.A. Molinari Novoa.

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

Gender: This genus name is currently treated as neuter.

Most recent taxonomic treatment adopted: Casanova, M.T. & Karol, K.G. (2023). Charophytes of Australia’s Northern Territory – I. Tribe Chareae. Australian Systematic Botany 36(1): 38-79, 22 figs.

Comments: Lamprothamnium has 13 extant species known from Australia (Casanova 2013a) and at least two additional species in Europe, Africa and Asia. All of these species occur in brackish to saline to hypersaline habitats. When compared with ecorticate species of Chara, the species of Lamprothamnium usually have much narrower axes. The current key is largely based on the arrangement of gametangia, so several shoots should be examined and the occurrence and placement of oosporangia and antheridia noted.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=43116

Citing AlgaeBase
Cite this record as:
E.A. Molinari Novoa in Guiry, M.D. & Guiry, G.M. 16 June 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024