The type and Australian species of the red algal genera Liagora and Ganonema (Liagoraceae, Nemaliales)

Huisman, John M.

doi:10.1071/sb01027

Cited by 21 publications

(36 citation statements)

References 22 publications

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“…Gametophytic plants grew at 1-2-m depths on sandy substrata or coral reefs and were found in late autumn through late spring (October-April). The specimens we examined agreed well with the description by Huisman (2002). Thalli were soft and mucoid, erect from a discoid holdfast, 8-14 cm in height, with one to five lightly calcified main axes (Fig.…”

Section: Morphological Observationsmentioning

confidence: 93%

“…The red algal genus Ganonema (Liagoraceae) currently includes 15 species that are distributed primarily in tropical and warm-water regions in the Pacific, Atlantic and Indian Oceans (Afonso-Carrillo et al 1998;Ballantine & Aponte 2002;Huisman 2002Huisman , 2006Huisman et al 2004). The genus was established by Fan & Wang (1974) for Liagora farinosa J.V.…”

Section: Introductionmentioning

confidence: 98%

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Revisiting the systematics of Ganonema (Liagoraceae, Rhodophyta) with emphasis on species from the northwest Pacific Ocean

2014

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The genus Ganonema was distinguished from the other genera in the Liagoraceae morphologically by several reproductive and vegetative features, including spermatangia formed in dense, dendroidal clusters; carpogonial branches remaining unfused after fertilisation, having compact gonimoblasts; and medullary filaments being relatively broad. In addition, the generitype G. farinosum was uniquely characterised by its carpogonial branches being borne on small, specialised branches arising from the basal part of assimilatory filaments, a feature not seen in other species of Ganonema. Our molecular analyses, incorporating several species currently attributed to Ganonema, showed that the genus was polyphyletic and represented in three independent lineages, one including the generitype G. farinosum, a second including 'G' dendroideum, and a third containing three 'Ganonema' ÇG.' clavatum, 'G.' borowitzkae and 'G.' samaense) from the northwest Pacific Ocean. We have therefore proposed two segregate genera, Gloiocallis gen. nov. for 'G.' dendroideum and Hommersandiophycus gen. nov. for 'G. ' clavatum, 'G.' borowitzkae and 'G.' samaense. Morphologically, Gloiocallis differed from Ganonema and Hommersandiophycus in having only a few involucral filaments produced from the cortical cells above the supporting cell and most cells of the gonimoblasts differentiating into carposporangia, Hommersandiophycus can be separated from related genera by a combination of unfused carpogonial branches, involucral filaments produced from the cortical cells above and below the supporting cell and its neighbouring cells, carposporangia differentiating sequentially in chains of two to three and gonimoblasts being hemispherical to spherical! The taxonomy of other species currently placed in Ganonema but not analysed in this study requires further work.

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Section: Morphological Observationsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 98%

Revisiting the systematics of Ganonema (Liagoraceae, Rhodophyta) with emphasis on species from the northwest Pacific Ocean

2014

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“…Several recent publications have increased the number of species recorded for the region (e.g. Phillips et aI., 1993;King and Puttock, 1994;Huisman, 1996;Phillips and Huisman, 1997;Phillips, 2000;Huisman, 2001;2002) and many tropical species from the northwest were illustrated in the recent Marine Plants of Australia (Huisman, 2000). However, a comprehensive flora for the region has yet to be produced.…”

Section: Introductionmentioning

confidence: 99%

Marine benthic flora of the Dampier Archipelago, Western Australia

Huisman¹

2004

Rec West Aust Mus Sup

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“…This subdivision has been flagged many times based on observations of reproductive development (Huisman & Kraft, 1994;Huisman & Wynne, 1998;Huisman, 2002;Huisman & Schils, 2002), and implemented, in part, by the resurrection of Ganonema (Huisman & Kraft, 1994) and Izziella (Huisman & Schils, 2002), but it is yet to be undertaken since DNA sequences for the type of the genus (Liagora viscida)…”

Section: A Liagoroidesmentioning

confidence: 99%

Large subunit rDNA gene sequences and reproductive morphology revealStenopeltisto be a member of the Liagoraceae (Nemaliales, Rhodophyta), with a description ofAkalaphycusgen. nov.

Huisman¹,

Abbott²,

Sherwood³

2004

European Journal of Phycology

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A morphological and gene sequence study has shown the red algal genus Stenopeltis to be a member of the Liagoraceae (Nemaliales), not the Polyidaceae (Gigartinales) where it was placed after being segregated from Rhodopeltis. Post-fertilization events in Stenopeltis gracilis (the type of the genus) include a spreading, diffuse gonimoblast arising directly from the zygote ( = post-fertilization carpogonium), and no auxiliary cells, features characteristic of the Liagoraceae. Moreover, phylogenetic analyses based on LSU (large subunit) rDNA sequences clearly place Stenopeltis in a clade with members of the Liagoraceae. These observations are at odds with the existing taxonomic placement of the genus and a re-interpretation of earlier observations purporting to show the presence of auxiliary cells is presented. The morphology and reproduction of the three species currently attributed to the genus, S. gracilis (the type), S. setchelliae, and S. liagoroides, are described. LSU sequences as well as carpogonial branch and cystocarp morphology of S. setchelliae are distinct from those of S. gracilis (the type), and the segregate genus Akalaphycus is proposed to accommodate S. setchelliae and S. liagoroides.

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The type and Australian species of the red algal genera Liagora and Ganonema (Liagoraceae, Nemaliales)

Cited by 21 publications

References 22 publications

Revisiting the systematics of Ganonema (Liagoraceae, Rhodophyta) with emphasis on species from the northwest Pacific Ocean

Revisiting the systematics of Ganonema (Liagoraceae, Rhodophyta) with emphasis on species from the northwest Pacific Ocean

Marine benthic flora of the Dampier Archipelago, Western Australia

Large subunit rDNA gene sequences and reproductive morphology revealStenopeltisto be a member of the Liagoraceae (Nemaliales, Rhodophyta), with a description ofAkalaphycusgen. nov.

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