Jeannerettia Hooker f. & Harvey, 1847, nom. illeg.

Holotype species: Jeannerettia lobata Hooker f. & Harvey

Currently accepted name for the type species: Pollexfenia lobata (Hooker f. & Harvey) Falkenberg

Original publication and holotype designation: Harvey, W.H. (1847). Nereis australis, or algae of the southern ocean: being figures and descriptions of marine plants, collected on the shores of the Cape of Good Hope, the extra-tropical Australian colonies, Tasmania, New Zealand, and the Antarctic regions; deposited in the Herbarium of the Dublin University. [Part 1]. pp. i-viii, 1-64, pls I-XXV. London: Reeve Brothers.

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Description: Thalli upright and bilateral, polysiphonous, up to 50 cm tall (Fuhrer et al. 1981); midrib sometimes prominent, attached by discoid holdfast or some species prostrate and dorsiventral becoming upright and bilateral. Blade-like thalli formed by congenital fusion of many polysiphonous branches distichously formed on numerous axes; branches in 1/4 divergence of spiral; branchlets on flat-side of thallus deciduous trichoblasts or undeveloped. Thallus irregularly branched or lobed; often with ruffled margins. Apices not involute; 4 pericentral cells. Adventitious branches often on midribs of older plants; midrib corticated in some species. Gametophyte reproductive structures borne in clustered fertile trichoblasts on thallus surface, usually over midrib or veins. Cystocarps ovoid to urceolate, sessile or on short stalks. Spermatangial capitula oval flattened structures (Kylin 1956). Tetrasporangia in stichidia, usually clustered, 1 per segment but in 2 rows in stichidium.

Information kindly contributed by R.E. Norris but may now be outdated.

Taxonomic status: This name is currently regarded as a synonym of Pollexfenia.

Gender: This genus name is currently treated as feminine.

Comments: Known only in southern and Western Australia.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=40851

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 01 March 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 April 2024