Achnanthidium maritimo-antarcticum Van de Vijver & Kopalova 2014, sp. nov.
Achnanthidium maritimo-antarcticum Van de Vijver & Kopalová sp. nov. Figs 29-53 Morphological observations Light microscopy (Figs 29-49) Frustules in girdle view rectangular, bent around the transapical axis (Figs 29, 30).Valves linear-lanceolate with parallel to slightly convex margins and clea...
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Online Access: | https://dx.doi.org/10.5281/zenodo.3851710 https://zenodo.org/record/3851710 |
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ftdatacite:10.5281/zenodo.3851710 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Biodiversity Taxonomy Chromista Bacillariophyta Bacillariophyceae Achnanthales Achnanthidiaceae Achnanthidium Achnanthidium maritimo-Antarcticum |
spellingShingle |
Biodiversity Taxonomy Chromista Bacillariophyta Bacillariophyceae Achnanthales Achnanthidiaceae Achnanthidium Achnanthidium maritimo-Antarcticum Vijver, Bart Van De Kopalová, Kateřina Achnanthidium maritimo-antarcticum Van de Vijver & Kopalova 2014, sp. nov. |
topic_facet |
Biodiversity Taxonomy Chromista Bacillariophyta Bacillariophyceae Achnanthales Achnanthidiaceae Achnanthidium Achnanthidium maritimo-Antarcticum |
description |
Achnanthidium maritimo-antarcticum Van de Vijver & Kopalová sp. nov. Figs 29-53 Morphological observations Light microscopy (Figs 29-49) Frustules in girdle view rectangular, bent around the transapical axis (Figs 29, 30).Valves linear-lanceolate with parallel to slightly convex margins and clearly protracted, rostrate, occasionally subcapitate apices (Figs 31-49). Valve dimensions (n=25): length 12–15 µm, width 2.3–2.7 µm. Raphe valve (Figs 31-40) concave with a linear axial area, narrow to almost absent near the valve apices, hardly widening towards the central part of the valve. Central area irregular, formed by several more widely spaced striae. Raphe straight, filiform, invisible, with indistinct straight, simple proximal raphe endings. Distal raphe hardly discernible in LM. Striae slightly radiate throughout the entire valve, becoming more radiate and more densely spaced near the apices, 30– 33 in 10 µm, up to 40–42 in 10 µm near the valve apices. Rapheless valve (Figs 41-49) slightly convex with very narrow, linear axial area, widening to form a weakly elliptically, never transapically elongated central area, never forming a fascia or subfascia. Central striae slightly more distantly spaced. Striae slightly radiate throughout, only slightly more denser near the apices, 30–32 in 10 µm. Scanning electron microscopy (Figs 50-53) Striae in the raphe valve composed of a series of 3 – 4 distinct, rounded to square areolae terminating in one transapically elongated, rectangular areola (Fig. 50). Central striae composed of 2 rounded areolae and one transapically elongated areola near the valve margin (Fig. 50). Occasionally, short slit-like areolae interposed between the central striae. Near the apices, striae only composed of 2–3 rounded areolae (Fig. 50). Mantle areolae elongated, slit-like. Striae on the rapheless valve composed of 2–5 irregularly shaped (mostly rounded or elongated rectangular) areolae (Fig. 51). Near the apices, striae showing lowest number of areolae (Fig. 51). Internal areolae openings on both valves covered by hymenes (Figs 52, 53). External raphe branches straight to weakly curved terminating in simple, short proximal and distal raphe endings (Fig. 50). Distal raphe endings terminating just beyond the last apical stria (Fig. 50). Internally, proximal raphe endings short, slightly bent. Distal raphe endings terminating in small helictoglossae (Fig. 52). Etymology The specific epithet refers to the geographical area where the new species was found: Maritime Antarctic Region. The hyphen can and should be maintained in the species name based on art. 60.9 of the International Code of Nomenclature for algae, fungi and plants (McNeill et al. 2012). Type material Holotype Slide BR-4362 (National Botanic Garden, Meise, Belgium). Type locality Byers Peninsula, Livingston Island, South Shetland Islands, sample BY055 (62°37’41.7”S 61°06’30.4”W) (Leg. B. Van de Vijver; coll. date 15 Jan. 2009). Isotypes Slides PLP-252 (UA, University of Antwerp, Belgium). Ecology, distribution and associated diatom flora The type population of A. maritimo-antarcticum was found in a large lake located on the central plateau of Byers Peninsula. The lake is characterized by a weakly alkaline pH (7.5) and a low conductivity (130 µS/cm). The ion composition in the lake is mainly dominated by Na + (20.0 mg/l) and Ca 2+ (12.1mg /l). Both nutrients (N-NO 3 +N-NO 2) and phosphate were rather low (25 µg /l and 10 µg /l resp.). The shoreline of the lake was completely covered with partly submerged mosses. Dominant taxa in the sample included Fragilaria capucina s.l. Desm. (Desmazières 1825), Staurosirella sp., Navicula cremeri Van de Vijver & Zidarova in Van de Vijver et al. (Van de Vijver et al. 2011d) and Nitzschia cf. perminuta . Smaller populations were found in other lakes such as Limnopolar Lake but these populations never exceed 1% of the total diatom composition. Due to force-fitting and taxonomic drift, the distribution of the new taxon in the Antarctic Region is unclear. : Published as part of Vijver, Bart Van De & Kopalová, Kateřina, 2014, Four Achnanthidium species (Bacillariophyta) formerly identified as Achnanthidium minutissimum from the Antarctic Region, pp. 1-19 in European Journal of Taxonomy 79 on pages 6-8, DOI: 10.5852/ejt.2014.79, http://zenodo.org/record/3835050 : {"references": ["Mcneill J., Barrie F. R., Buck W. R., Demoulin V., Greuter W., Hawksworth D. L., Herendeen P. S., Knapp S., Marhold K., Prado J., Prud'homme Van Reine W. F., Smith G. F., Wiersema J. H. & Turland N. J. 2012. International Code of Nomenclature for algae, fungi, and plants (Melbourne Code). Regnum Vegetabile 154. Koeltz Scientific Books, Koenigstein.", "Desmazieres J. B. H. J. 1825. Plantes cryptogames du Nord de la France. Leleux, Lille.", "Van de Vijver B., Zidarova R., Sterken M., Verleyen E., de Haan M., Vyverman W., Hinz F. & Sabbe K. 2011 d. Revision of the genus Navicula s. s. (Bacillariophyceae) in inland water of the Sub-Antarctic and Antarctic with the description of 5 new species. Phycologia 50: 281 - 297. http: // dx. doi. org / 10.2216 / 10 - 49.1"]} |
format |
Text |
author |
Vijver, Bart Van De Kopalová, Kateřina |
author_facet |
Vijver, Bart Van De Kopalová, Kateřina |
author_sort |
Vijver, Bart Van De |
title |
Achnanthidium maritimo-antarcticum Van de Vijver & Kopalova 2014, sp. nov. |
title_short |
Achnanthidium maritimo-antarcticum Van de Vijver & Kopalova 2014, sp. nov. |
title_full |
Achnanthidium maritimo-antarcticum Van de Vijver & Kopalova 2014, sp. nov. |
title_fullStr |
Achnanthidium maritimo-antarcticum Van de Vijver & Kopalova 2014, sp. nov. |
title_full_unstemmed |
Achnanthidium maritimo-antarcticum Van de Vijver & Kopalova 2014, sp. nov. |
title_sort |
achnanthidium maritimo-antarcticum van de vijver & kopalova 2014, sp. nov. |
publisher |
Zenodo |
publishDate |
2014 |
url |
https://dx.doi.org/10.5281/zenodo.3851710 https://zenodo.org/record/3851710 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) ENVELOPE(-60.283,-60.283,-63.900,-63.900) ENVELOPE(13.090,13.090,67.932,67.932) ENVELOPE(-61.066,-61.066,-62.633,-62.633) ENVELOPE(78.362,78.362,-68.528,-68.528) ENVELOPE(-61.098,-61.098,-62.633,-62.633) |
geographic |
Antarctic The Antarctic South Shetland Islands Livingston Island Byers Reine Byers peninsula McNeill Limnopolar Lake |
geographic_facet |
Antarctic The Antarctic South Shetland Islands Livingston Island Byers Reine Byers peninsula McNeill Limnopolar Lake |
genre |
Antarc* Antarctic Livingston Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Livingston Island South Shetland Islands |
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Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess |
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https://doi.org/10.5281/zenodo.3851710 https://doi.org/10.5852/ejt.2014.79 https://doi.org/10.5281/zenodo.3835056 https://doi.org/10.5281/zenodo.3851711 |
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ftdatacite:10.5281/zenodo.3851710 2023-05-15T13:55:03+02:00 Achnanthidium maritimo-antarcticum Van de Vijver & Kopalova 2014, sp. nov. Vijver, Bart Van De Kopalová, Kateřina 2014 https://dx.doi.org/10.5281/zenodo.3851710 https://zenodo.org/record/3851710 unknown Zenodo http://zenodo.org/record/3835050 http://publication.plazi.org/id/161AFFE1B916ED678027FFB9FFD3FA20 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5852/ejt.2014.79 http://zenodo.org/record/3835050 http://publication.plazi.org/id/161AFFE1B916ED678027FFB9FFD3FA20 https://dx.doi.org/10.5281/zenodo.3835056 https://dx.doi.org/10.5281/zenodo.3851711 https://zenodo.org/communities/biosyslit Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess CC0 Biodiversity Taxonomy Chromista Bacillariophyta Bacillariophyceae Achnanthales Achnanthidiaceae Achnanthidium Achnanthidium maritimo-Antarcticum article-journal ScholarlyArticle Text Taxonomic treatment 2014 ftdatacite https://doi.org/10.5281/zenodo.3851710 https://doi.org/10.5852/ejt.2014.79 https://doi.org/10.5281/zenodo.3835056 https://doi.org/10.5281/zenodo.3851711 2022-03-10T13:08:34Z Achnanthidium maritimo-antarcticum Van de Vijver & Kopalová sp. nov. Figs 29-53 Morphological observations Light microscopy (Figs 29-49) Frustules in girdle view rectangular, bent around the transapical axis (Figs 29, 30).Valves linear-lanceolate with parallel to slightly convex margins and clearly protracted, rostrate, occasionally subcapitate apices (Figs 31-49). Valve dimensions (n=25): length 12–15 µm, width 2.3–2.7 µm. Raphe valve (Figs 31-40) concave with a linear axial area, narrow to almost absent near the valve apices, hardly widening towards the central part of the valve. Central area irregular, formed by several more widely spaced striae. Raphe straight, filiform, invisible, with indistinct straight, simple proximal raphe endings. Distal raphe hardly discernible in LM. Striae slightly radiate throughout the entire valve, becoming more radiate and more densely spaced near the apices, 30– 33 in 10 µm, up to 40–42 in 10 µm near the valve apices. Rapheless valve (Figs 41-49) slightly convex with very narrow, linear axial area, widening to form a weakly elliptically, never transapically elongated central area, never forming a fascia or subfascia. Central striae slightly more distantly spaced. Striae slightly radiate throughout, only slightly more denser near the apices, 30–32 in 10 µm. Scanning electron microscopy (Figs 50-53) Striae in the raphe valve composed of a series of 3 – 4 distinct, rounded to square areolae terminating in one transapically elongated, rectangular areola (Fig. 50). Central striae composed of 2 rounded areolae and one transapically elongated areola near the valve margin (Fig. 50). Occasionally, short slit-like areolae interposed between the central striae. Near the apices, striae only composed of 2–3 rounded areolae (Fig. 50). Mantle areolae elongated, slit-like. Striae on the rapheless valve composed of 2–5 irregularly shaped (mostly rounded or elongated rectangular) areolae (Fig. 51). Near the apices, striae showing lowest number of areolae (Fig. 51). Internal areolae openings on both valves covered by hymenes (Figs 52, 53). External raphe branches straight to weakly curved terminating in simple, short proximal and distal raphe endings (Fig. 50). Distal raphe endings terminating just beyond the last apical stria (Fig. 50). Internally, proximal raphe endings short, slightly bent. Distal raphe endings terminating in small helictoglossae (Fig. 52). Etymology The specific epithet refers to the geographical area where the new species was found: Maritime Antarctic Region. The hyphen can and should be maintained in the species name based on art. 60.9 of the International Code of Nomenclature for algae, fungi and plants (McNeill et al. 2012). Type material Holotype Slide BR-4362 (National Botanic Garden, Meise, Belgium). Type locality Byers Peninsula, Livingston Island, South Shetland Islands, sample BY055 (62°37’41.7”S 61°06’30.4”W) (Leg. B. Van de Vijver; coll. date 15 Jan. 2009). Isotypes Slides PLP-252 (UA, University of Antwerp, Belgium). Ecology, distribution and associated diatom flora The type population of A. maritimo-antarcticum was found in a large lake located on the central plateau of Byers Peninsula. The lake is characterized by a weakly alkaline pH (7.5) and a low conductivity (130 µS/cm). The ion composition in the lake is mainly dominated by Na + (20.0 mg/l) and Ca 2+ (12.1mg /l). Both nutrients (N-NO 3 +N-NO 2) and phosphate were rather low (25 µg /l and 10 µg /l resp.). The shoreline of the lake was completely covered with partly submerged mosses. Dominant taxa in the sample included Fragilaria capucina s.l. Desm. (Desmazières 1825), Staurosirella sp., Navicula cremeri Van de Vijver & Zidarova in Van de Vijver et al. (Van de Vijver et al. 2011d) and Nitzschia cf. perminuta . Smaller populations were found in other lakes such as Limnopolar Lake but these populations never exceed 1% of the total diatom composition. Due to force-fitting and taxonomic drift, the distribution of the new taxon in the Antarctic Region is unclear. : Published as part of Vijver, Bart Van De & Kopalová, Kateřina, 2014, Four Achnanthidium species (Bacillariophyta) formerly identified as Achnanthidium minutissimum from the Antarctic Region, pp. 1-19 in European Journal of Taxonomy 79 on pages 6-8, DOI: 10.5852/ejt.2014.79, http://zenodo.org/record/3835050 : {"references": ["Mcneill J., Barrie F. R., Buck W. R., Demoulin V., Greuter W., Hawksworth D. L., Herendeen P. S., Knapp S., Marhold K., Prado J., Prud'homme Van Reine W. F., Smith G. F., Wiersema J. H. & Turland N. J. 2012. International Code of Nomenclature for algae, fungi, and plants (Melbourne Code). Regnum Vegetabile 154. Koeltz Scientific Books, Koenigstein.", "Desmazieres J. B. H. J. 1825. Plantes cryptogames du Nord de la France. Leleux, Lille.", "Van de Vijver B., Zidarova R., Sterken M., Verleyen E., de Haan M., Vyverman W., Hinz F. & Sabbe K. 2011 d. Revision of the genus Navicula s. s. (Bacillariophyceae) in inland water of the Sub-Antarctic and Antarctic with the description of 5 new species. Phycologia 50: 281 - 297. http: // dx. doi. org / 10.2216 / 10 - 49.1"]} Text Antarc* Antarctic Livingston Island South Shetland Islands DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic South Shetland Islands Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Byers ENVELOPE(-60.283,-60.283,-63.900,-63.900) Reine ENVELOPE(13.090,13.090,67.932,67.932) Byers peninsula ENVELOPE(-61.066,-61.066,-62.633,-62.633) McNeill ENVELOPE(78.362,78.362,-68.528,-68.528) Limnopolar Lake ENVELOPE(-61.098,-61.098,-62.633,-62.633) |