Pinnularia undefined-1
Pinnularia sp 1 (Figs 44–47) Valves linear with parallel or, in larger specimens, weakly undulated margins, and non-protracted, broadly rounded apices. Valve dimensions (n=11): length 25–35 µm, width 5.0– 6.5 µm. Axial area narrow, linear, clearly widening towards the central area. Central area form...
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ftzenodo:oai:zenodo.org:4976118 2023-05-15T13:35:56+02:00 Pinnularia undefined-1 Zidarova, Ralitsa Kopalová, Kateŕina Vijver, Bart Van De 2012-02-06 https://zenodo.org/record/4976118 https://doi.org/10.5281/zenodo.4976118 unknown info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/03F2686FFF92925B42EBFFCDFDD294FF doi:10.11646/phytotaxa.44.1.2 http://zenodo.org/record/4894994 http://publication.plazi.org/id/FFCB1017FF94925D427CFB34FFCF930D doi:10.5281/zenodo.4894996 doi:10.5281/zenodo.4976117 https://zenodo.org/communities/biosyslit https://zenodo.org/record/4976118 https://doi.org/10.5281/zenodo.4976118 oai:zenodo.org:4976118 info:eu-repo/semantics/openAccess The genus Pinnularia (Bacillariophyta) excluding the section Distantes on Livingston Island (South Shetland Islands) with the description of twelve new taxa, pp. 11-37 in Phytotaxa 44 17 Biodiversity Taxonomy Chromista Bacillariophyta Bacillariophyceae Naviculales Naviculaceae Pinnularia Pinnularia undefined-1 info:eu-repo/semantics/other publication-taxonomictreatment 2012 ftzenodo https://doi.org/10.5281/zenodo.497611810.11646/phytotaxa.44.1.210.5281/zenodo.489499610.5281/zenodo.4976117 2023-03-10T14:15:29Z Pinnularia sp 1 (Figs 44–47) Valves linear with parallel or, in larger specimens, weakly undulated margins, and non-protracted, broadly rounded apices. Valve dimensions (n=11): length 25–35 µm, width 5.0– 6.5 µm. Axial area narrow, linear, clearly widening towards the central area. Central area forming a large rhombic fascia, about 1/3 to 1/4 of valve length, expanded to the margins. Raphe slightly curved. Central raphe endings extending into the central area well beyond the last central striae, unilaterally deflected and finishing in relatively distant drop-like pores. Terminal fissures almost indistinct,?-shaped. Striae strongly radiate in the middle, abruptly changing their direction to convergent toward the valve ends, 11–13 in 10 µm. Longitudinal lines absent. Habitat and distribution:—This is an extremely rare species on Livingston Island. Only a few valves were found on Hurd Peninsula, in streams, in a vegetation of wet mosses close to streams, brooks or puddles. Observations:— These Antarctic specimens belong to the complex of species around P. divergentissima (Grunow in Cleve & Möller 1879: 186) Cleve (1895: 77) sensu Krammer (2000). Pinnularia divergentissima and its varieties can be separated based on a different valve outline, having mostly convex margins and smaller subrostrate to capitate valve ends, as well as by a slightly higher number of striae (according to Krammer 2000: 12–14 vs 11–13 in 10 µm) and a smaller central area. The most similar species is P. krammeri Metzeltin (in Lange-Bertalot & Metzeltin 1996: 98), described from Finland. The main differences between the Antarctic population and P.krammeri include a larger valve width of P. krammeri (6.7–7.8 µm vs. 5.0– 6.5 µm), a comparably smaller central area and more closely spaced proximal raphe endings. Since only a few valves have been observed, it is too early to conclude whether they should be described as an independent species or belong to P. krammeri. Published as part of Zidarova, Ralitsa, Kopalová, Kateŕina & Vijver, ... Other/Unknown Material Antarc* Antarctic Livingston Island Zenodo Antarctic The Antarctic Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Hurd ENVELOPE(-60.366,-60.366,-62.682,-62.682) Hurd peninsula ENVELOPE(-60.366,-60.366,-62.676,-62.676) |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Chromista Bacillariophyta Bacillariophyceae Naviculales Naviculaceae Pinnularia Pinnularia undefined-1 |
spellingShingle |
Biodiversity Taxonomy Chromista Bacillariophyta Bacillariophyceae Naviculales Naviculaceae Pinnularia Pinnularia undefined-1 Zidarova, Ralitsa Kopalová, Kateŕina Vijver, Bart Van De Pinnularia undefined-1 |
topic_facet |
Biodiversity Taxonomy Chromista Bacillariophyta Bacillariophyceae Naviculales Naviculaceae Pinnularia Pinnularia undefined-1 |
description |
Pinnularia sp 1 (Figs 44–47) Valves linear with parallel or, in larger specimens, weakly undulated margins, and non-protracted, broadly rounded apices. Valve dimensions (n=11): length 25–35 µm, width 5.0– 6.5 µm. Axial area narrow, linear, clearly widening towards the central area. Central area forming a large rhombic fascia, about 1/3 to 1/4 of valve length, expanded to the margins. Raphe slightly curved. Central raphe endings extending into the central area well beyond the last central striae, unilaterally deflected and finishing in relatively distant drop-like pores. Terminal fissures almost indistinct,?-shaped. Striae strongly radiate in the middle, abruptly changing their direction to convergent toward the valve ends, 11–13 in 10 µm. Longitudinal lines absent. Habitat and distribution:—This is an extremely rare species on Livingston Island. Only a few valves were found on Hurd Peninsula, in streams, in a vegetation of wet mosses close to streams, brooks or puddles. Observations:— These Antarctic specimens belong to the complex of species around P. divergentissima (Grunow in Cleve & Möller 1879: 186) Cleve (1895: 77) sensu Krammer (2000). Pinnularia divergentissima and its varieties can be separated based on a different valve outline, having mostly convex margins and smaller subrostrate to capitate valve ends, as well as by a slightly higher number of striae (according to Krammer 2000: 12–14 vs 11–13 in 10 µm) and a smaller central area. The most similar species is P. krammeri Metzeltin (in Lange-Bertalot & Metzeltin 1996: 98), described from Finland. The main differences between the Antarctic population and P.krammeri include a larger valve width of P. krammeri (6.7–7.8 µm vs. 5.0– 6.5 µm), a comparably smaller central area and more closely spaced proximal raphe endings. Since only a few valves have been observed, it is too early to conclude whether they should be described as an independent species or belong to P. krammeri. Published as part of Zidarova, Ralitsa, Kopalová, Kateŕina & Vijver, ... |
format |
Other/Unknown Material |
author |
Zidarova, Ralitsa Kopalová, Kateŕina Vijver, Bart Van De |
author_facet |
Zidarova, Ralitsa Kopalová, Kateŕina Vijver, Bart Van De |
author_sort |
Zidarova, Ralitsa |
title |
Pinnularia undefined-1 |
title_short |
Pinnularia undefined-1 |
title_full |
Pinnularia undefined-1 |
title_fullStr |
Pinnularia undefined-1 |
title_full_unstemmed |
Pinnularia undefined-1 |
title_sort |
pinnularia undefined-1 |
publishDate |
2012 |
url |
https://zenodo.org/record/4976118 https://doi.org/10.5281/zenodo.4976118 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) ENVELOPE(-60.366,-60.366,-62.682,-62.682) ENVELOPE(-60.366,-60.366,-62.676,-62.676) |
geographic |
Antarctic The Antarctic Livingston Island Hurd Hurd peninsula |
geographic_facet |
Antarctic The Antarctic Livingston Island Hurd Hurd peninsula |
genre |
Antarc* Antarctic Livingston Island |
genre_facet |
Antarc* Antarctic Livingston Island |
op_source |
The genus Pinnularia (Bacillariophyta) excluding the section Distantes on Livingston Island (South Shetland Islands) with the description of twelve new taxa, pp. 11-37 in Phytotaxa 44 17 |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/03F2686FFF92925B42EBFFCDFDD294FF doi:10.11646/phytotaxa.44.1.2 http://zenodo.org/record/4894994 http://publication.plazi.org/id/FFCB1017FF94925D427CFB34FFCF930D doi:10.5281/zenodo.4894996 doi:10.5281/zenodo.4976117 https://zenodo.org/communities/biosyslit https://zenodo.org/record/4976118 https://doi.org/10.5281/zenodo.4976118 oai:zenodo.org:4976118 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5281/zenodo.497611810.11646/phytotaxa.44.1.210.5281/zenodo.489499610.5281/zenodo.4976117 |
_version_ |
1766072186678804480 |