A taxonomic survey of<i>oedogonium</i>(oedogoniales, chlorophyta) in the South Island and Chatham Islands, New Zealand

Novis, Phil M.

doi:10.1080/0028825x.2003.9512853

Cited by 8 publications

(4 citation statements)

References 22 publications

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“…Although many specimens resemble previously described species to a greater or lesser degree, very few match another description exactly. As with species of Oedogonium Link (Novis 2003), our knowledge of the relationships of the New Zealand flora to those in other parts of the world may not be realistic until there is a universally acknowledged species concept for Spirogyra and Zygnema. The results of the present survey, taken at face value, suggest strong cosmopolitanism, and S. clavata was the only species found that appears to be endemic.…”

Section: Discussionmentioning

confidence: 99%

New records ofSpirogyraandZygnema(Charophyceae, Chlorophyta) in New Zealand

Novis¹

2004

New Zealand Journal of Botany

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Filamentous zygnematalean algae frequently dominate periphyton assemblages in New Zealand streams, yet only 10 reliable species records of the most common genera, Spirogyra and Zygnema, exist. One of these species, S. clavata, was found again in a new survey of stream habitats, mainly in the South Island. Ten further species (nine of Spirogyra and one of Zygnema) are also described and identified. Morphology and interfertility are affected by polyploid series in Spirogyra, making current species concepts unsatisfactory. Identifications in this study emphasise zygospore ornamentation, which is the most stable and conserved character known.

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Section: Discussionmentioning

confidence: 99%

New records ofSpirogyraandZygnema(Charophyceae, Chlorophyta) in New Zealand

Novis¹

2004

New Zealand Journal of Botany

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“…Oedogonium) and heteromorphic life cycles (e.g. Codiolum-phase of Urospora) [62][63][64][65]. Modern streptophyte algae with UF morphologies (Klebsormidiophyceae and Zygnematophyceae) are all restricted to freshwater and terrestrial environments, and can present rhizoidal holdfasts (e.g.…”

Section: Biological Affinitiesmentioning

confidence: 99%

“…Oedogonium) and heteromorphic life cycles (e.g. Codiolum-phase of Urospora) [62][63][64][65]. Modern streptophyte algae with UF morphologies (Klebsormidiophyceae and Zygnematophyceae) royalsocietypublishing.org/journal/rspb Proc.…”

Section: Biological Affinitiesmentioning

confidence: 99%

In situfilamentous communities from the Ediacaran (approx. 563 Ma) of Brazil

et al. 2021

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Precambrian filamentous microfossils are common and diverse. Nevertheless, their taxonomic assignment can be difficult owing to their overall simple shapes typically lacking in diagnostic features. Here, we report in situ communities of well-preserved, large filamentous impressions from the Ediacaran Itajaí Basin ( ca 563 Ma) of Brazil. The filaments are uniserial (unbranched) and can reach up to 200 µm in width and up to 44 mm in length. They occur as both densely packed or sparsely populated surfaces, and typically show a consistent orientation. Although simple in shape, their preferred orientation suggests they were tethered to the seafloor, and their overall flexibility (e.g. bent, folded and twisted) supports a biological (rather than sedimentary) affinity. Biometric comparisons with modern filamentous groups further support their biological affinity, suggesting links with either large sulfide-oxidizing bacteria (SOB) or eukaryotes. Other morphological and palaeoecological characteristics further corroborates their similarities with modern large filamentous SOB. Their widespread occurrence and association with complex Ediacaran macrobiota (e.g. frondose organisms, Palaeopascichnus ) suggest that they probably played an important role in the ecological dynamics of these early benthic communities by providing firm substrates for metazoans to inhabit. It is further hypothesized that the dynamic redox condition in the latest Ediacaran, with the non-continuous rise in oxygen concentration and periods of hypoxia, may have created ideal conditions for SOB to thrive.

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“…Recent New Zealand surveys achieved this in only 18% of samples containing Spirogyra and 29% of those containing Oedogonium (Novis 2003(Novis ,2004. The authors of this volume have done superbly well just to obtain so much material, a painstaking task carried out over many years.…”

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confidence: 93%

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Nelson

2007

New Zealand Journal of Botany

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A taxonomic survey ofoedogonium(oedogoniales, chlorophyta) in the South Island and Chatham Islands, New Zealand

Cited by 8 publications

References 22 publications

New records ofSpirogyraandZygnema(Charophyceae, Chlorophyta) in New Zealand

New records ofSpirogyraandZygnema(Charophyceae, Chlorophyta) in New Zealand

In situfilamentous communities from the Ediacaran (approx. 563 Ma) of Brazil

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