Xestoleberis amazonica Luz & Coimbra, 2015, sp. nov.
Xestoleberis amazonica sp. nov. Fig. 4: 1–14 1999 Xestoleberis sp. 2 Coimbra et al. , tab. 1. Type series. Holotype: MP-O- 1938, adult female, RV length 0.48 mm, height 0.32 mm. Paratypes: three adult males (MP-O- 1939 –MP-O- 1941) and two adult females (MP-O- 1942 and MP-O- 1943). Type locality. GE...
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Online Access: | https://dx.doi.org/10.5281/zenodo.6113267 https://zenodo.org/record/6113267 |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
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topic |
Biodiversity Taxonomy Animalia Arthropoda Ostracoda Podocopida Xestoleberididae Xestoleberis Xestoleberis amazonica |
spellingShingle |
Biodiversity Taxonomy Animalia Arthropoda Ostracoda Podocopida Xestoleberididae Xestoleberis Xestoleberis amazonica Luz, Nathália Carvalho Da Coimbra, João Carlos Xestoleberis amazonica Luz & Coimbra, 2015, sp. nov. |
topic_facet |
Biodiversity Taxonomy Animalia Arthropoda Ostracoda Podocopida Xestoleberididae Xestoleberis Xestoleberis amazonica |
description |
Xestoleberis amazonica sp. nov. Fig. 4: 1–14 1999 Xestoleberis sp. 2 Coimbra et al. , tab. 1. Type series. Holotype: MP-O- 1938, adult female, RV length 0.48 mm, height 0.32 mm. Paratypes: three adult males (MP-O- 1939 –MP-O- 1941) and two adult females (MP-O- 1942 and MP-O- 1943). Type locality. GEOMAR/Leg III—Sample 210 (04° 35.5 ’N / 50 ° 21 ’W); depth: 104 m; sediment: sand and bioclasts. Etymology. With reference to the restricted distribution of the species to the Amazon region. Material. 50 adults and 40 juveniles. Dimensions. See table 3. Diagnosis. A medium-sized Xestoleberis species. Carapace almost drop-shaped in lateral view with sinuous ventral margin. LV overlapping RV, except along ventral margin. Surface smooth with sieve-type, lip-type and simple-type normal pore canals. Xestoleberis -spot small, outlined and subdivided. Hinge antimerodont with median element crenulate and short. Adductor muscle scars a row of four sub-elliptical scars and a frontal Vshaped scar. Description. A medium-sized and thick-shelled species of Xestoleberis . Somewhat drop-shaped in lateral view. In dorsal view ovate. Ventral surface flattened. LV overlapping RV, except along ventral margin. Maximum length in the top third of the height. Maximum height medianly. Maximum width just posterior of mid-length. Anterior margin obliquely rounded, protruding and angled ventrally. Posterior margin similar in both valves but slightly more rounded in LV. Dorsal margin arched. Ventral margin slightly convex anteriorly. Surface typically smooth, with three types of normal pore canals ( sensu Sato & Kamiya 2007): sieve-type, lip-type and simple-type. Eye-spot inconspicuous. Xestoleberis -spot small, outlined and divided into two parts. Line of concrescence and inner lamella separated anterior and posteriorly, forming a relatively large vestibulum at the anterior end. Selvage peripheral in anterior margin and sub-peripheral in posterior margin. Marginal pore canals simple, straight and short. Hinge antimerodont, with well-developed teeth in posterior and anterior elements. Both terminal teeth in RV. Median element crenulate and short. Adductor muscle scars a row of four sub-elliptical scars, the ventral-median more elongate. Frontal muscle scar V-shaped. Sexual dimorphism present: female conspicuously larger than male and more rounded in RV. In dorsal view male less tumid at the posterior end. Remarks. Xestoleberis amazonica sp. nov. was already recorded by Coimbra et al. (1999) in open nomenclature. It has a similar shape to X . rigusa Müller 1908, described from Antarctica. However, X . rigusa is larger and more inflated in dorsal view than X . amazonica sp. nov. Both species also differ from each other in the pattern of the Xestoleberis -spot, which is small and divided into two parts in the species herein described. Occurrence and distribution. Xestoleberis amazonica sp. nov. occurs along the Northern region of the Brazilian continental shelf (Fig. 2; Tab. 1) in a depth range of 30 to 240 m. It is restricted to the area between Orange Cape and the Parnaiba Delta. : Published as part of Luz, Nathália Carvalho Da & Coimbra, João Carlos, 2015, The genus Xestoleberis (Ostracoda: Xestoleberididae) in the Northern, Northeastern and Eastern regions of the Brazilian continental shelf, pp. 177-195 in Zootaxa 3974 (2) on pages 187-189, DOI: 10.11646/zootaxa.3974.2.3, http://zenodo.org/record/239624 : {"references": ["Sato, T. & Kamiya, T. (2007) Taxonomy and geographical distribution of recent Xestoleberis species (Cytheroidea, Ostracoda, Crustacea) from Japan. Paleontological Research, 11, 183 - 227. http: // dx. doi. org / 10.2517 / 1342 - 8144 (2007) 11 % 5 B 183: TAGDOR % 5 D 2.0. CO; 2", "Coimbra, J. C., Pinto, I. D., Wurdig, N. L. & Do Carmo, D. A. (1999) Zoogeography of Holocene Podocopina (Ostracoda) from the Brazilian equatorial shelf. Marine Micropaleontology, 37, 365 - 379. http: // dx. doi. org / 10.1016 / S 0377 - 8398 (99) 00025 - 0"]} |
format |
Text |
author |
Luz, Nathália Carvalho Da Coimbra, João Carlos |
author_facet |
Luz, Nathália Carvalho Da Coimbra, João Carlos |
author_sort |
Luz, Nathália Carvalho Da |
title |
Xestoleberis amazonica Luz & Coimbra, 2015, sp. nov. |
title_short |
Xestoleberis amazonica Luz & Coimbra, 2015, sp. nov. |
title_full |
Xestoleberis amazonica Luz & Coimbra, 2015, sp. nov. |
title_fullStr |
Xestoleberis amazonica Luz & Coimbra, 2015, sp. nov. |
title_full_unstemmed |
Xestoleberis amazonica Luz & Coimbra, 2015, sp. nov. |
title_sort |
xestoleberis amazonica luz & coimbra, 2015, sp. nov. |
publisher |
Zenodo |
publishDate |
2015 |
url |
https://dx.doi.org/10.5281/zenodo.6113267 https://zenodo.org/record/6113267 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
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ftdatacite:10.5281/zenodo.6113267 2023-05-15T14:03:47+02:00 Xestoleberis amazonica Luz & Coimbra, 2015, sp. nov. Luz, Nathália Carvalho Da Coimbra, João Carlos 2015 https://dx.doi.org/10.5281/zenodo.6113267 https://zenodo.org/record/6113267 unknown Zenodo http://zenodo.org/record/239624 http://publication.plazi.org/id/FF8FFFEC9D36A254651D9D30FFB2FFBD http://zoobank.org/9BAAB1CC-B92E-482C-9D73-B6415222FED3 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.3974.2.3 http://zenodo.org/record/239624 http://publication.plazi.org/id/FF8FFFEC9D36A254651D9D30FFB2FFBD https://dx.doi.org/10.5281/zenodo.239628 https://dx.doi.org/10.5281/zenodo.239626 http://zoobank.org/9BAAB1CC-B92E-482C-9D73-B6415222FED3 https://dx.doi.org/10.5281/zenodo.6113266 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 Ostracoda Podocopida Xestoleberididae Xestoleberis Xestoleberis amazonica article-journal ScholarlyArticle Taxonomic treatment Text 2015 ftdatacite https://doi.org/10.5281/zenodo.6113267 https://doi.org/10.11646/zootaxa.3974.2.3 https://doi.org/10.5281/zenodo.239628 https://doi.org/10.5281/zenodo.239626 https://doi.org/10.5281/zenodo.6113266 2022-04-01T10:48:08Z Xestoleberis amazonica sp. nov. Fig. 4: 1–14 1999 Xestoleberis sp. 2 Coimbra et al. , tab. 1. Type series. Holotype: MP-O- 1938, adult female, RV length 0.48 mm, height 0.32 mm. Paratypes: three adult males (MP-O- 1939 –MP-O- 1941) and two adult females (MP-O- 1942 and MP-O- 1943). Type locality. GEOMAR/Leg III—Sample 210 (04° 35.5 ’N / 50 ° 21 ’W); depth: 104 m; sediment: sand and bioclasts. Etymology. With reference to the restricted distribution of the species to the Amazon region. Material. 50 adults and 40 juveniles. Dimensions. See table 3. Diagnosis. A medium-sized Xestoleberis species. Carapace almost drop-shaped in lateral view with sinuous ventral margin. LV overlapping RV, except along ventral margin. Surface smooth with sieve-type, lip-type and simple-type normal pore canals. Xestoleberis -spot small, outlined and subdivided. Hinge antimerodont with median element crenulate and short. Adductor muscle scars a row of four sub-elliptical scars and a frontal Vshaped scar. Description. A medium-sized and thick-shelled species of Xestoleberis . Somewhat drop-shaped in lateral view. In dorsal view ovate. Ventral surface flattened. LV overlapping RV, except along ventral margin. Maximum length in the top third of the height. Maximum height medianly. Maximum width just posterior of mid-length. Anterior margin obliquely rounded, protruding and angled ventrally. Posterior margin similar in both valves but slightly more rounded in LV. Dorsal margin arched. Ventral margin slightly convex anteriorly. Surface typically smooth, with three types of normal pore canals ( sensu Sato & Kamiya 2007): sieve-type, lip-type and simple-type. Eye-spot inconspicuous. Xestoleberis -spot small, outlined and divided into two parts. Line of concrescence and inner lamella separated anterior and posteriorly, forming a relatively large vestibulum at the anterior end. Selvage peripheral in anterior margin and sub-peripheral in posterior margin. Marginal pore canals simple, straight and short. Hinge antimerodont, with well-developed teeth in posterior and anterior elements. Both terminal teeth in RV. Median element crenulate and short. Adductor muscle scars a row of four sub-elliptical scars, the ventral-median more elongate. Frontal muscle scar V-shaped. Sexual dimorphism present: female conspicuously larger than male and more rounded in RV. In dorsal view male less tumid at the posterior end. Remarks. Xestoleberis amazonica sp. nov. was already recorded by Coimbra et al. (1999) in open nomenclature. It has a similar shape to X . rigusa Müller 1908, described from Antarctica. However, X . rigusa is larger and more inflated in dorsal view than X . amazonica sp. nov. Both species also differ from each other in the pattern of the Xestoleberis -spot, which is small and divided into two parts in the species herein described. Occurrence and distribution. Xestoleberis amazonica sp. nov. occurs along the Northern region of the Brazilian continental shelf (Fig. 2; Tab. 1) in a depth range of 30 to 240 m. It is restricted to the area between Orange Cape and the Parnaiba Delta. : Published as part of Luz, Nathália Carvalho Da & Coimbra, João Carlos, 2015, The genus Xestoleberis (Ostracoda: Xestoleberididae) in the Northern, Northeastern and Eastern regions of the Brazilian continental shelf, pp. 177-195 in Zootaxa 3974 (2) on pages 187-189, DOI: 10.11646/zootaxa.3974.2.3, http://zenodo.org/record/239624 : {"references": ["Sato, T. & Kamiya, T. (2007) Taxonomy and geographical distribution of recent Xestoleberis species (Cytheroidea, Ostracoda, Crustacea) from Japan. Paleontological Research, 11, 183 - 227. http: // dx. doi. org / 10.2517 / 1342 - 8144 (2007) 11 % 5 B 183: TAGDOR % 5 D 2.0. CO; 2", "Coimbra, J. C., Pinto, I. D., Wurdig, N. L. & Do Carmo, D. A. (1999) Zoogeography of Holocene Podocopina (Ostracoda) from the Brazilian equatorial shelf. Marine Micropaleontology, 37, 365 - 379. http: // dx. doi. org / 10.1016 / S 0377 - 8398 (99) 00025 - 0"]} Text Antarc* Antarctica DataCite Metadata Store (German National Library of Science and Technology) |