Microphoxus cornutus
Microphoxus cornutus (Schellenberg) (figures 10–12) Metharpinia cornuta Schellenberg, 1931: 68–69, figure 35. Paraphoxus cornutus : Barnard, 1960: 271. Microphoxus cornutus : Barnard, 1980: 110–115, figures 3 (part), 4. Material examined The material examined is detailed in table 3. Remarks All the...
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Zenodo
2003
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Online Access: | https://dx.doi.org/10.5281/zenodo.4675167 https://zenodo.org/record/4675167 |
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openpolar |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Biodiversity Taxonomy Animalia Arthropoda Malacostraca Amphipoda Phoxocephalidae Microphoxus Microphoxus cornutus |
spellingShingle |
Biodiversity Taxonomy Animalia Arthropoda Malacostraca Amphipoda Phoxocephalidae Microphoxus Microphoxus cornutus ALONSO DE PINA, GLORIA M. Microphoxus cornutus |
topic_facet |
Biodiversity Taxonomy Animalia Arthropoda Malacostraca Amphipoda Phoxocephalidae Microphoxus Microphoxus cornutus |
description |
Microphoxus cornutus (Schellenberg) (figures 10–12) Metharpinia cornuta Schellenberg, 1931: 68–69, figure 35. Paraphoxus cornutus : Barnard, 1960: 271. Microphoxus cornutus : Barnard, 1980: 110–115, figures 3 (part), 4. Material examined The material examined is detailed in table 3. Remarks All the material examined from the different south-west Atlantic localities, encompassing Buenos Aires and Chubut provinces, agree closely with the description and illustrations given by Barnard (1980) (figures 10, 11a–e). Barnard redescribed a female from Punta Arenas (Chile) which he borrowed from the Swedish State Museum. The material deposited in the Swedish collections had been described by Schellenberg (1931) from Punta Arenas (Chile) and Ushuaia (Argentina), but his illustrations are inadequate and there are no fine details of character states to be found in literature to assist in accurate identification of the species. Comparing the female redescribed by Barnard (1980) with the Argentine females examined herein, some differences were observed related to number of spines and setae on appendages and mouthparts, with all variations represented in various combinations in the specimens, and it was impossible to discover a single individual displaying all the attributes described for the female from Punta Arenas (Schellenberg, 1931). Thus, while some specimens have the same spine formula for antenna 2, they display uropods with dissimilar spine formulae, and vice versa , as seen in table 4. The number of setae on peduncle article 2 of antenna 1 ranges from five (some sockets are not clear) to nine. Epimera 1–3 are similar in shape, but the number of marginal and facial setae varies from individual to individual, although this variation is not very conspicuous. Barnard (1980) pointed out that the terminal male of M. cornutus was unknown. In the present study mature males were morphologically similar to mature females, except in certain morphological characters which denote sexual dimorphism, such as eyes remarkably larger (figure 11f); antenna 1, peduncle article 1 with medial patch of fine setae; primary flagellum, composed of eight articles, bearing one calceolus each on articles 1–3 and one aesthetasc each on articles 4–7 (figure 11g); antenna 2, peduncle articles 3 and 4 ornamented with dorsomedial brushes of sensory fine setae; article 4 facial spine formula: 3-4-3, and ventral margin with few setae; peduncle article 5 about as long as article 4, dorsal margin with three sets of male setae and one distal calceolus, facial spine formula 2; flagellum elongate, composed of 32 articles, bearing one calceolus each on articles 1–3 and then on every other article: 5, 7..., 29 (figure 12a); uropod 3, inner ramus as long as outer ramus article one, medial and lateral margins profusely plumose setose; outer ramus article 1, medially setose, lateral margin with two acclivities, spine formula: 2-2-0, setal formula: 0-0-2; article 2 of outer ramus shorter than in female, 0.13, apex with longer plumose setae (figure 12b). Microphoxus cornutus was recorded in Buenos Aires and Chubut provinces, inhabiting very fine to fine sand from shallow waters to 19 m depth. : Published as part of ALONSO DE PINA, GLORIA M., 2003, A new species of Phoxocephalidae and some other records of sand-burrowing Amphipoda (Crustacea) from Argentina, pp. 1029-1057 in Journal of Natural History 37 (9) on pages 1045-1048, DOI: 10.1080/00222930110102467, http://zenodo.org/record/4675151 : {"references": ["SCHELLENBERG, A., 1931, Gammariden und Caprelliden des Magellangebietes, Sudgeorgiens und der Westantarktis, Further Zoological Results of the Swedish Antarctic Expedition 1901 - 1903, 2 (6), 1 - 290.", "BARNARD, J. L., 1960, The amphipod family Phoxocephalidae in the eastern Pacific Ocean, with analyses of other species and notes for a revision of the family, Allan Hancock Pacific Expeditions, 18 (3), 175 - 375.", "BARNARD, J. L. and BARNARD, C. M., 1980, Two new phoxocephalid genera, Fuegiphoxus and Phoxorgia, from magellanic South America (Amphipoda: Crustacea), Proceedings of the Biological Society of Washington, 93 (3), 849 - 874."]} |
format |
Text |
author |
ALONSO DE PINA, GLORIA M. |
author_facet |
ALONSO DE PINA, GLORIA M. |
author_sort |
ALONSO DE PINA, GLORIA M. |
title |
Microphoxus cornutus |
title_short |
Microphoxus cornutus |
title_full |
Microphoxus cornutus |
title_fullStr |
Microphoxus cornutus |
title_full_unstemmed |
Microphoxus cornutus |
title_sort |
microphoxus cornutus |
publisher |
Zenodo |
publishDate |
2003 |
url |
https://dx.doi.org/10.5281/zenodo.4675167 https://zenodo.org/record/4675167 |
long_lat |
ENVELOPE(-62.533,-62.533,-76.100,-76.100) ENVELOPE(-40.000,-40.000,-82.167,-82.167) ENVELOPE(6.797,6.797,62.685,62.685) |
geographic |
Antarctic Pacific Argentina Argentine Chubut Ushuaia Pina |
geographic_facet |
Antarctic Pacific Argentina Argentine Chubut Ushuaia Pina |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://zenodo.org/record/4675151 http://publication.plazi.org/id/032FFF9D7F0AB72E225C3623C935FF97 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.1080/00222930110102467 http://zenodo.org/record/4675151 http://publication.plazi.org/id/032FFF9D7F0AB72E225C3623C935FF97 https://dx.doi.org/10.5281/zenodo.4675190 https://dx.doi.org/10.5281/zenodo.4675192 https://dx.doi.org/10.5281/zenodo.4675196 https://dx.doi.org/10.5281/zenodo.4675166 https://dx.doi.org/10.5281/zenodo.4675168 https://zenodo.org/communities/biosyslit |
op_rights |
Open Access info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5281/zenodo.4675167 https://doi.org/10.1080/00222930110102467 https://doi.org/10.5281/zenodo.4675190 https://doi.org/10.5281/zenodo.4675192 https://doi.org/10.5281/zenodo.4675196 https://doi.org/10.5281/zenodo.4675166 https: |
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1766265541203329024 |
spelling |
ftdatacite:10.5281/zenodo.4675167 2023-05-15T13:57:43+02:00 Microphoxus cornutus ALONSO DE PINA, GLORIA M. 2003 https://dx.doi.org/10.5281/zenodo.4675167 https://zenodo.org/record/4675167 unknown Zenodo http://zenodo.org/record/4675151 http://publication.plazi.org/id/032FFF9D7F0AB72E225C3623C935FF97 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.1080/00222930110102467 http://zenodo.org/record/4675151 http://publication.plazi.org/id/032FFF9D7F0AB72E225C3623C935FF97 https://dx.doi.org/10.5281/zenodo.4675190 https://dx.doi.org/10.5281/zenodo.4675192 https://dx.doi.org/10.5281/zenodo.4675196 https://dx.doi.org/10.5281/zenodo.4675166 https://dx.doi.org/10.5281/zenodo.4675168 https://zenodo.org/communities/biosyslit Open Access info:eu-repo/semantics/openAccess Biodiversity Taxonomy Animalia Arthropoda Malacostraca Amphipoda Phoxocephalidae Microphoxus Microphoxus cornutus Text Taxonomic treatment article-journal ScholarlyArticle 2003 ftdatacite https://doi.org/10.5281/zenodo.4675167 https://doi.org/10.1080/00222930110102467 https://doi.org/10.5281/zenodo.4675190 https://doi.org/10.5281/zenodo.4675192 https://doi.org/10.5281/zenodo.4675196 https://doi.org/10.5281/zenodo.4675166 https: 2021-11-05T12:55:41Z Microphoxus cornutus (Schellenberg) (figures 10–12) Metharpinia cornuta Schellenberg, 1931: 68–69, figure 35. Paraphoxus cornutus : Barnard, 1960: 271. Microphoxus cornutus : Barnard, 1980: 110–115, figures 3 (part), 4. Material examined The material examined is detailed in table 3. Remarks All the material examined from the different south-west Atlantic localities, encompassing Buenos Aires and Chubut provinces, agree closely with the description and illustrations given by Barnard (1980) (figures 10, 11a–e). Barnard redescribed a female from Punta Arenas (Chile) which he borrowed from the Swedish State Museum. The material deposited in the Swedish collections had been described by Schellenberg (1931) from Punta Arenas (Chile) and Ushuaia (Argentina), but his illustrations are inadequate and there are no fine details of character states to be found in literature to assist in accurate identification of the species. Comparing the female redescribed by Barnard (1980) with the Argentine females examined herein, some differences were observed related to number of spines and setae on appendages and mouthparts, with all variations represented in various combinations in the specimens, and it was impossible to discover a single individual displaying all the attributes described for the female from Punta Arenas (Schellenberg, 1931). Thus, while some specimens have the same spine formula for antenna 2, they display uropods with dissimilar spine formulae, and vice versa , as seen in table 4. The number of setae on peduncle article 2 of antenna 1 ranges from five (some sockets are not clear) to nine. Epimera 1–3 are similar in shape, but the number of marginal and facial setae varies from individual to individual, although this variation is not very conspicuous. Barnard (1980) pointed out that the terminal male of M. cornutus was unknown. In the present study mature males were morphologically similar to mature females, except in certain morphological characters which denote sexual dimorphism, such as eyes remarkably larger (figure 11f); antenna 1, peduncle article 1 with medial patch of fine setae; primary flagellum, composed of eight articles, bearing one calceolus each on articles 1–3 and one aesthetasc each on articles 4–7 (figure 11g); antenna 2, peduncle articles 3 and 4 ornamented with dorsomedial brushes of sensory fine setae; article 4 facial spine formula: 3-4-3, and ventral margin with few setae; peduncle article 5 about as long as article 4, dorsal margin with three sets of male setae and one distal calceolus, facial spine formula 2; flagellum elongate, composed of 32 articles, bearing one calceolus each on articles 1–3 and then on every other article: 5, 7..., 29 (figure 12a); uropod 3, inner ramus as long as outer ramus article one, medial and lateral margins profusely plumose setose; outer ramus article 1, medially setose, lateral margin with two acclivities, spine formula: 2-2-0, setal formula: 0-0-2; article 2 of outer ramus shorter than in female, 0.13, apex with longer plumose setae (figure 12b). Microphoxus cornutus was recorded in Buenos Aires and Chubut provinces, inhabiting very fine to fine sand from shallow waters to 19 m depth. : Published as part of ALONSO DE PINA, GLORIA M., 2003, A new species of Phoxocephalidae and some other records of sand-burrowing Amphipoda (Crustacea) from Argentina, pp. 1029-1057 in Journal of Natural History 37 (9) on pages 1045-1048, DOI: 10.1080/00222930110102467, http://zenodo.org/record/4675151 : {"references": ["SCHELLENBERG, A., 1931, Gammariden und Caprelliden des Magellangebietes, Sudgeorgiens und der Westantarktis, Further Zoological Results of the Swedish Antarctic Expedition 1901 - 1903, 2 (6), 1 - 290.", "BARNARD, J. L., 1960, The amphipod family Phoxocephalidae in the eastern Pacific Ocean, with analyses of other species and notes for a revision of the family, Allan Hancock Pacific Expeditions, 18 (3), 175 - 375.", "BARNARD, J. L. and BARNARD, C. M., 1980, Two new phoxocephalid genera, Fuegiphoxus and Phoxorgia, from magellanic South America (Amphipoda: Crustacea), Proceedings of the Biological Society of Washington, 93 (3), 849 - 874."]} Text Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic Pacific Argentina Argentine Chubut ENVELOPE(-62.533,-62.533,-76.100,-76.100) Ushuaia ENVELOPE(-40.000,-40.000,-82.167,-82.167) Pina ENVELOPE(6.797,6.797,62.685,62.685) |