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IRMNG taxon detailsTriskelia C. Strullu-Derrien & A. Le Hérissé in Strullu-Derrien et al., 2020 †
fossil only
Strullu‐Derrien, C.; Le Hérissé, A.; Goral, T.; Spencer, A. R.; Kenrick, P. (2020). The overlooked aquatic green algal component of early terrestrial environments: <i>Triskelia scotlandica</i> gen. et sp. nov. from the Rhynie cherts. <em>Papers in Palaeontology.</em> 7(2): 709-719., available online at https://doi.org/10.1002/spp2.1303 [details]
Taxonomic remark Described as a freshwater green alga, re-interpreted as more likely a fungus (or oomycete, currently in Chromista) by...
Taxonomic remark Described as a freshwater green alga, re-interpreted as more likely a fungus (or oomycete, currently in Chromista) by Krings, 2020. From that paper: The enigmatic microfossil Triskelia scotlandica from the Lower Devonian Rhynie chert is an acritarch-like, usually spheroidal to ovoid vesicle with a surface ornamentation comprised of isolated triradiate and meandering, high membranous ridges. The form has been formally described based on dispersed specimens preserved inside the remains of a land plant axis, and interpreted as the resting stage of a microscopic alga. ... [however] T. scotlandica is not algal, but rather fungal or fungus-like in nature. The swellings might be oogonia of a representative of the Oomycota (e.g., Saprolegniales), and T. scotlandica accordingly an ornamented oospore. However, specimens with a discharge tube suggest that T. scotlandica is more likely a zoosporangium or resting spore stage of an endoparasite, perhaps with affinities to the holocarpic Oomycota (e.g., Olpidiopsis), Cryptomycota (e.g., Rozella), or zoosporic fungi (e.g., Olpidium), in which case the hyphal swellings would be either dilatations resulting from the expansion of the parasite inside, or a host response (hypertrophy). The affinity of T. scotlandica remains unresolved. [details]
IRMNG (2025). Triskelia C. Strullu-Derrien & A. Le Hérissé in Strullu-Derrien et al., 2020 †. Accessed at: https://www.irmng.org/aphia.php?p=taxdetails&id=11947704 on 2025-09-11
Date action by
original description
Strullu‐Derrien, C.; Le Hérissé, A.; Goral, T.; Spencer, A. R.; Kenrick, P. (2020). The overlooked aquatic green algal component of early terrestrial environments: <i>Triskelia scotlandica</i> gen. et sp. nov. from the Rhynie cherts. <em>Papers in Palaeontology.</em> 7(2): 709-719., available online at https://doi.org/10.1002/spp2.1303 [details]
basis of record Strullu‐Derrien, C.; Le Hérissé, A.; Goral, T.; Spencer, A. R.; Kenrick, P. (2020). The overlooked aquatic green algal component of early terrestrial environments: <i>Triskelia scotlandica</i> gen. et sp. nov. from the Rhynie cherts. <em>Papers in Palaeontology.</em> 7(2): 709-719., available online at https://doi.org/10.1002/spp2.1303 [details] verified source for family Krings, M. (2020). Triskelia scotlandica, an enigmatic Rhynie chert microfossil revisited. <em>PalZ.</em> 95(1): 1-15., available online at https://doi.org/10.1007/s12542-020-00531-w note: as probable fungus (or oomycete, currently in Chromista), refer note [details] name verified source Strullu‐Derrien, C.; Le Hérissé, A.; Goral, T.; Spencer, A. R.; Kenrick, P. (2020). The overlooked aquatic green algal component of early terrestrial environments: <i>Triskelia scotlandica</i> gen. et sp. nov. from the Rhynie cherts. <em>Papers in Palaeontology.</em> 7(2): 709-719., available online at https://doi.org/10.1002/spp2.1303 [details] current name source Krings, M. (2020). Triskelia scotlandica, an enigmatic Rhynie chert microfossil revisited. <em>PalZ.</em> 95(1): 1-15., available online at https://doi.org/10.1007/s12542-020-00531-w [details] extant flag source Strullu‐Derrien, C.; Le Hérissé, A.; Goral, T.; Spencer, A. R.; Kenrick, P. (2020). The overlooked aquatic green algal component of early terrestrial environments: <i>Triskelia scotlandica</i> gen. et sp. nov. from the Rhynie cherts. <em>Papers in Palaeontology.</em> 7(2): 709-719., available online at https://doi.org/10.1002/spp2.1303 [details] habitat flag source Krings, M. (2020). Triskelia scotlandica, an enigmatic Rhynie chert microfossil revisited. <em>PalZ.</em> 95(1): 1-15., available online at https://doi.org/10.1007/s12542-020-00531-w note: inferred [details] Unreviewed
Taxonomic remark Described as a freshwater green alga, re-interpreted as more likely a fungus (or oomycete, currently in Chromista) by Krings, 2020. From that paper: The enigmatic microfossil Triskelia scotlandica from the Lower Devonian Rhynie chert is an acritarch-like, usually spheroidal to ovoid vesicle with a surface ornamentation comprised of isolated triradiate and meandering, high membranous ridges. The form has been formally described based on dispersed specimens preserved inside the remains of a land plant axis, and interpreted as the resting stage of a microscopic alga. ... [however] T. scotlandica is not algal, but rather fungal or fungus-like in nature. The swellings might be oogonia of a representative of the Oomycota (e.g., Saprolegniales), and T. scotlandica accordingly an ornamented oospore. However, specimens with a discharge tube suggest that T. scotlandica is more likely a zoosporangium or resting spore stage of an endoparasite, perhaps with affinities to the holocarpic Oomycota (e.g., Olpidiopsis), Cryptomycota (e.g., Rozella), or zoosporic fungi (e.g., Olpidium), in which case the hyphal swellings would be either dilatations resulting from the expansion of the parasite inside, or a host response (hypertrophy). The affinity of T. scotlandica remains unresolved. [details]
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