Gnathisotoma Cassagnau 1957
Gnathisotoma Cassagnau, 1957 Cassagnau (1957) established the genus Gnathisotoma for the new species bicolor which was found in the central Pyrenees. Later Najt (1981) redescribed bicolor and described a new species G. deharvengi from snowfields in the Pyrenees and reported another possibly new spec...
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ftzenodo:oai:zenodo.org:5670737 2024-09-15T17:42:26+00:00 Gnathisotoma Cassagnau 1957 Fjellberg, Arne 2010-12-31 https://doi.org/10.5281/zenodo.5670737 http://treatment.plazi.org/id/504F2D6CFFD6FF8697BEF1FCFA4B19E1 unknown Zenodo https://doi.org/10.5281/zenodo.196078 http://publication.plazi.org/id/AC765514FFD9FF899729F019FFC71D06 https://sibils.text-analytics.ch/search/collections/plazi/504F2D6CFFD6FF8697BEF1FCFA4B19E1 https://zenodo.org/communities/biosyslit https://doi.org/10.5281/zenodo.5670736 https://doi.org/10.5281/zenodo.5670737 oai:zenodo.org:5670737 http://treatment.plazi.org/id/504F2D6CFFD6FF8697BEF1FCFA4B19E1 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Cryophilic Isotomidae (Collembola) of the Northwestern Rocky Mountains, U. S. A., pp. 27-49 in Zootaxa, 2513, 42, (2010-12-31) Biodiversity Taxonomy Animalia Arthropoda Entognatha Collembola Isotomidae Gnathisotoma info:eu-repo/semantics/other 2010 ftzenodo https://doi.org/10.5281/zenodo.567073710.5281/zenodo.19607810.5281/zenodo.5670736 2024-07-25T12:34:54Z Gnathisotoma Cassagnau, 1957 Cassagnau (1957) established the genus Gnathisotoma for the new species bicolor which was found in the central Pyrenees. Later Najt (1981) redescribed bicolor and described a new species G. deharvengi from snowfields in the Pyrenees and reported another possibly new species (known only from ecomorphic specimens) from the Cantabrian mountains in Spain. Yoshii (1990) described two more species from glaciers in Chile, G. patagonica and G. pallens , and also included the Antarctic species Isotoma klovstadi Carpenter, 1902 in Gnathisotoma . Stevens et al. (2006) transferred klovstadi to the genus Desoria . Further species of Gnathisotoma are not known. In the original diagnosis of the genus Cassagnau (1957) stressed the modified maxillae of bicolor . Najt (1981) defined Gnathisotoma on the reduced number of sensilla on the tergites, the modified maxilla and the absence of frontal setae on the ventral tube. Yoshii (1990) used the subsegmentation in proximal part of dens as a single diagnostic character for Gnathisotoma . Potapov (2001) used the presence of four long maxillary lamellae and the absence of anterior setae on ventral tube as diagnostic characters separating Gnathisotoma from Desoria . However, none of the above characters are clearly inclusive of all species and unique to the genus. There is only a gradual difference between the maxilla of the Pyreneean Gnathisotoma and some Desoria species ( tigrina -group). Also some Desoria have the sensillary equipment of tergites as much reduced as in Gnathisotoma . The significance of the ventral incision (subsegmentation) at base of dens is unclear on a generic level. The presence of the Gnathisotoma described below from Alaska with maxilla almost identical to bicolor but with 1–2 frontal setae on ventral tube and an increased number of tergal sensilla make the situation more confused and questions the status of Gnathisotoma as separate genus from Desoria . Published as part of Fjellberg, Arne, 2010, Cryophilic Isotomidae (Collembola) ... Other/Unknown Material Antarc* Antarctic glaciers Alaska Zenodo |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Arthropoda Entognatha Collembola Isotomidae Gnathisotoma |
spellingShingle |
Biodiversity Taxonomy Animalia Arthropoda Entognatha Collembola Isotomidae Gnathisotoma Fjellberg, Arne Gnathisotoma Cassagnau 1957 |
topic_facet |
Biodiversity Taxonomy Animalia Arthropoda Entognatha Collembola Isotomidae Gnathisotoma |
description |
Gnathisotoma Cassagnau, 1957 Cassagnau (1957) established the genus Gnathisotoma for the new species bicolor which was found in the central Pyrenees. Later Najt (1981) redescribed bicolor and described a new species G. deharvengi from snowfields in the Pyrenees and reported another possibly new species (known only from ecomorphic specimens) from the Cantabrian mountains in Spain. Yoshii (1990) described two more species from glaciers in Chile, G. patagonica and G. pallens , and also included the Antarctic species Isotoma klovstadi Carpenter, 1902 in Gnathisotoma . Stevens et al. (2006) transferred klovstadi to the genus Desoria . Further species of Gnathisotoma are not known. In the original diagnosis of the genus Cassagnau (1957) stressed the modified maxillae of bicolor . Najt (1981) defined Gnathisotoma on the reduced number of sensilla on the tergites, the modified maxilla and the absence of frontal setae on the ventral tube. Yoshii (1990) used the subsegmentation in proximal part of dens as a single diagnostic character for Gnathisotoma . Potapov (2001) used the presence of four long maxillary lamellae and the absence of anterior setae on ventral tube as diagnostic characters separating Gnathisotoma from Desoria . However, none of the above characters are clearly inclusive of all species and unique to the genus. There is only a gradual difference between the maxilla of the Pyreneean Gnathisotoma and some Desoria species ( tigrina -group). Also some Desoria have the sensillary equipment of tergites as much reduced as in Gnathisotoma . The significance of the ventral incision (subsegmentation) at base of dens is unclear on a generic level. The presence of the Gnathisotoma described below from Alaska with maxilla almost identical to bicolor but with 1–2 frontal setae on ventral tube and an increased number of tergal sensilla make the situation more confused and questions the status of Gnathisotoma as separate genus from Desoria . Published as part of Fjellberg, Arne, 2010, Cryophilic Isotomidae (Collembola) ... |
format |
Other/Unknown Material |
author |
Fjellberg, Arne |
author_facet |
Fjellberg, Arne |
author_sort |
Fjellberg, Arne |
title |
Gnathisotoma Cassagnau 1957 |
title_short |
Gnathisotoma Cassagnau 1957 |
title_full |
Gnathisotoma Cassagnau 1957 |
title_fullStr |
Gnathisotoma Cassagnau 1957 |
title_full_unstemmed |
Gnathisotoma Cassagnau 1957 |
title_sort |
gnathisotoma cassagnau 1957 |
publisher |
Zenodo |
publishDate |
2010 |
url |
https://doi.org/10.5281/zenodo.5670737 http://treatment.plazi.org/id/504F2D6CFFD6FF8697BEF1FCFA4B19E1 |
genre |
Antarc* Antarctic glaciers Alaska |
genre_facet |
Antarc* Antarctic glaciers Alaska |
op_source |
Cryophilic Isotomidae (Collembola) of the Northwestern Rocky Mountains, U. S. A., pp. 27-49 in Zootaxa, 2513, 42, (2010-12-31) |
op_relation |
https://doi.org/10.5281/zenodo.196078 http://publication.plazi.org/id/AC765514FFD9FF899729F019FFC71D06 https://sibils.text-analytics.ch/search/collections/plazi/504F2D6CFFD6FF8697BEF1FCFA4B19E1 https://zenodo.org/communities/biosyslit https://doi.org/10.5281/zenodo.5670736 https://doi.org/10.5281/zenodo.5670737 oai:zenodo.org:5670737 http://treatment.plazi.org/id/504F2D6CFFD6FF8697BEF1FCFA4B19E1 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.567073710.5281/zenodo.19607810.5281/zenodo.5670736 |
_version_ |
1810489017567805440 |