Portaratrum Guerrero-Kommritz, 2003, n. gen.
Portaratrum n. gen. Diagnosis : Antennula with four articles, antenna with six articles, basis of cheliped fused to cephalothorax, uropods biarticled, uropod exopod uniarticled, pleonal spur directed downwards. Description : Adult female: body long and slender about eight times longer than broad, ce...
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Online Access: | https://dx.doi.org/10.5281/zenodo.6276683 https://zenodo.org/record/6276683 |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Biodiversity Taxonomy Animalia Arthropoda Malacostraca Tanaidacea Portaratrum |
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Biodiversity Taxonomy Animalia Arthropoda Malacostraca Tanaidacea Portaratrum Guerrero-Kommritz, Jürgen Portaratrum Guerrero-Kommritz, 2003, n. gen. |
topic_facet |
Biodiversity Taxonomy Animalia Arthropoda Malacostraca Tanaidacea Portaratrum |
description |
Portaratrum n. gen. Diagnosis : Antennula with four articles, antenna with six articles, basis of cheliped fused to cephalothorax, uropods biarticled, uropod exopod uniarticled, pleonal spur directed downwards. Description : Adult female: body long and slender about eight times longer than broad, cephalothorax oval. Pereon composed of 6 free pereonites, pleon composed of 5 free pleonites and a pleotelson, ventral pleonal spur on pleonite 5. Antennula composed of four articles. Antenna composed of six articles, article 2 with a row of setules. Labrum hoodshaped with distal setules, mandibles well calcified, pars molaris not acute, with several terminal spinules. Maxillule endite with nine terminal spines. Maxilliped basis oval, endites not fused. Labium composed of 2 triangular lobes with distal setules. Cheliped basis fused to cephalothorax. Pereopods 1–3 with a simple stout seta on merus. No coxae on pereopods. Pleopods biramous. Uropods endopodite composed of two articles, endopod uniarticled. Neuter : As female except pleopods not well developed. Males : Unknown. Type species : Portaratrum afer n. sp., here designated. Included species : In addition to the type species, Portaratrum fascinatus n. sp. Etymology : The name is derived from the Latin words portare (to carry) and aratrum (the plough), with reference to the pleonal spur, meaning the one who carries a plough. Distribution : Abyssal plains of the tropical South Atlantic and tropical South Pacific Oceans. Remarks : Although some Tanaidacea possess ventral spiniform projections on their body, those located on the pereon, called hyposphenia, are very variable and have little taxonomic value (Lang 1953; GuerreroKommritz et al . 2002). Ventral spines located on pleonite 5 are stable and taxonomically valid. This character is present in Portaratrum and also in the genus Chauliopleona and in the species Leptognathia tuberculata Hansen, 1913, L. armata Hansen, 1913, L. hastata Hansen, 1913 and L. amdrupii Hansen, 1913. Portaratrum can easily be differentiated from Chauliopleona and Leptognathia by the basis of the chelipeds being fused to the cephalothorax. In addition, the new genus has a heavily calcified cuticle that resembles that of the Agathotanaidae. In Chauliopleona and Leptognathia , the cheliped is inserted into to the cephalothorax via a sclerite, the basis of the cheliped is not fused to the cephalothorax and the body is weakly calcified as in Portaratrum . In Chauliopleona , Leptognathia armata , L. hastata and L. amdrupii the pleonal spur is directed backwards rather than downwards. The uropod exopod is biarticled in Chauliopleona, and the Leptognathia species but uniarticled in Portaratrum . The form of the pleonal process in Portaratrum is quite similar to that of L. tuberculata . However, Portaratrum can be differentiated by the absence of the carpal shield of the cheliped which is present in L. tuberculata. This genus is here assigned provisionally to the family Colletteidae. The rigid body calcification and the cheliped attachment are more similar to that of the Agathotanaidae, but the form of the molar process and the presence of pleopods on females shows clearly that it does not belongs to that family. The absence of coxa, the form of the mandible and molar process, endites of the maxilliped not fused, place this genus close to Colletteidae. Further analysis will show if this genus belongs to the Colletteidae or a new not yet defined family. : Published as part of Guerrero-Kommritz, Jürgen, 2003, Portaratrum, a new genus of deepsea Tanaidacea (Crustacea) with description of two new species, pp. 1-14 in Zootaxa 282 on pages 3-4, DOI: 10.5281/zenodo.156812 : {"references": ["Lang, K. (1953) Apseudes hermaphroditicus n. sp. A hermaphroditic Tanaide from the Antarctic. Arkiv for Zoologi, 4 (8), 341 - 350.", "Guerrero-Kommritz, J. Schmidt, A. & Brandt, A. (2002) Paranarthrura Hansen 1913 (Crustacea: Tanaidacea) from the Angola Basin, description of Paranarthrua angolensis n. sp. Zootaxa 116, 1 - 12.", "Hansen, H. J. (1913) Crustacea, Malacostraca. II. Danish Ingolf Expedition 3, 1 - 127."]} |
format |
Text |
author |
Guerrero-Kommritz, Jürgen |
author_facet |
Guerrero-Kommritz, Jürgen |
author_sort |
Guerrero-Kommritz, Jürgen |
title |
Portaratrum Guerrero-Kommritz, 2003, n. gen. |
title_short |
Portaratrum Guerrero-Kommritz, 2003, n. gen. |
title_full |
Portaratrum Guerrero-Kommritz, 2003, n. gen. |
title_fullStr |
Portaratrum Guerrero-Kommritz, 2003, n. gen. |
title_full_unstemmed |
Portaratrum Guerrero-Kommritz, 2003, n. gen. |
title_sort |
portaratrum guerrero-kommritz, 2003, n. gen. |
publisher |
Zenodo |
publishDate |
2003 |
url |
https://dx.doi.org/10.5281/zenodo.6276683 https://zenodo.org/record/6276683 |
long_lat |
ENVELOPE(9.895,9.895,63.645,63.645) |
geographic |
Antarctic The Antarctic Pacific Seta |
geographic_facet |
Antarctic The Antarctic Pacific Seta |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
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http://publication.plazi.org/id/FFAFEF52FFF8FF88FF97C70EC3598C6E http://zoobank.org/A5BCCDFF-C846-4298-BF11-BDD284C6BEE4 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5281/zenodo.156812 http://publication.plazi.org/id/FFAFEF52FFF8FF88FF97C70EC3598C6E http://zoobank.org/A5BCCDFF-C846-4298-BF11-BDD284C6BEE4 https://dx.doi.org/10.5281/zenodo.6276682 https://zenodo.org/communities/biosyslit |
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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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CC0 |
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https://doi.org/10.5281/zenodo.6276683 https://doi.org/10.5281/zenodo.156812 https://doi.org/10.5281/zenodo.6276682 |
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ftdatacite:10.5281/zenodo.6276683 2023-05-15T13:55:39+02:00 Portaratrum Guerrero-Kommritz, 2003, n. gen. Guerrero-Kommritz, Jürgen 2003 https://dx.doi.org/10.5281/zenodo.6276683 https://zenodo.org/record/6276683 unknown Zenodo http://publication.plazi.org/id/FFAFEF52FFF8FF88FF97C70EC3598C6E http://zoobank.org/A5BCCDFF-C846-4298-BF11-BDD284C6BEE4 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.5281/zenodo.156812 http://publication.plazi.org/id/FFAFEF52FFF8FF88FF97C70EC3598C6E http://zoobank.org/A5BCCDFF-C846-4298-BF11-BDD284C6BEE4 https://dx.doi.org/10.5281/zenodo.6276682 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 Animalia Arthropoda Malacostraca Tanaidacea Portaratrum article-journal ScholarlyArticle Taxonomic treatment Text 2003 ftdatacite https://doi.org/10.5281/zenodo.6276683 https://doi.org/10.5281/zenodo.156812 https://doi.org/10.5281/zenodo.6276682 2022-04-01T12:36:57Z Portaratrum n. gen. Diagnosis : Antennula with four articles, antenna with six articles, basis of cheliped fused to cephalothorax, uropods biarticled, uropod exopod uniarticled, pleonal spur directed downwards. Description : Adult female: body long and slender about eight times longer than broad, cephalothorax oval. Pereon composed of 6 free pereonites, pleon composed of 5 free pleonites and a pleotelson, ventral pleonal spur on pleonite 5. Antennula composed of four articles. Antenna composed of six articles, article 2 with a row of setules. Labrum hoodshaped with distal setules, mandibles well calcified, pars molaris not acute, with several terminal spinules. Maxillule endite with nine terminal spines. Maxilliped basis oval, endites not fused. Labium composed of 2 triangular lobes with distal setules. Cheliped basis fused to cephalothorax. Pereopods 1–3 with a simple stout seta on merus. No coxae on pereopods. Pleopods biramous. Uropods endopodite composed of two articles, endopod uniarticled. Neuter : As female except pleopods not well developed. Males : Unknown. Type species : Portaratrum afer n. sp., here designated. Included species : In addition to the type species, Portaratrum fascinatus n. sp. Etymology : The name is derived from the Latin words portare (to carry) and aratrum (the plough), with reference to the pleonal spur, meaning the one who carries a plough. Distribution : Abyssal plains of the tropical South Atlantic and tropical South Pacific Oceans. Remarks : Although some Tanaidacea possess ventral spiniform projections on their body, those located on the pereon, called hyposphenia, are very variable and have little taxonomic value (Lang 1953; GuerreroKommritz et al . 2002). Ventral spines located on pleonite 5 are stable and taxonomically valid. This character is present in Portaratrum and also in the genus Chauliopleona and in the species Leptognathia tuberculata Hansen, 1913, L. armata Hansen, 1913, L. hastata Hansen, 1913 and L. amdrupii Hansen, 1913. Portaratrum can easily be differentiated from Chauliopleona and Leptognathia by the basis of the chelipeds being fused to the cephalothorax. In addition, the new genus has a heavily calcified cuticle that resembles that of the Agathotanaidae. In Chauliopleona and Leptognathia , the cheliped is inserted into to the cephalothorax via a sclerite, the basis of the cheliped is not fused to the cephalothorax and the body is weakly calcified as in Portaratrum . In Chauliopleona , Leptognathia armata , L. hastata and L. amdrupii the pleonal spur is directed backwards rather than downwards. The uropod exopod is biarticled in Chauliopleona, and the Leptognathia species but uniarticled in Portaratrum . The form of the pleonal process in Portaratrum is quite similar to that of L. tuberculata . However, Portaratrum can be differentiated by the absence of the carpal shield of the cheliped which is present in L. tuberculata. This genus is here assigned provisionally to the family Colletteidae. The rigid body calcification and the cheliped attachment are more similar to that of the Agathotanaidae, but the form of the molar process and the presence of pleopods on females shows clearly that it does not belongs to that family. The absence of coxa, the form of the mandible and molar process, endites of the maxilliped not fused, place this genus close to Colletteidae. Further analysis will show if this genus belongs to the Colletteidae or a new not yet defined family. : Published as part of Guerrero-Kommritz, Jürgen, 2003, Portaratrum, a new genus of deepsea Tanaidacea (Crustacea) with description of two new species, pp. 1-14 in Zootaxa 282 on pages 3-4, DOI: 10.5281/zenodo.156812 : {"references": ["Lang, K. (1953) Apseudes hermaphroditicus n. sp. A hermaphroditic Tanaide from the Antarctic. Arkiv for Zoologi, 4 (8), 341 - 350.", "Guerrero-Kommritz, J. Schmidt, A. & Brandt, A. (2002) Paranarthrura Hansen 1913 (Crustacea: Tanaidacea) from the Angola Basin, description of Paranarthrua angolensis n. sp. Zootaxa 116, 1 - 12.", "Hansen, H. J. (1913) Crustacea, Malacostraca. II. Danish Ingolf Expedition 3, 1 - 127."]} Text Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic Pacific Seta ENVELOPE(9.895,9.895,63.645,63.645) |