The genus Bradleya Hornibrook, 1952 (Crustacea: Ostracoda) in South America and adjacent oceanic areas, with description of a new bradleyine genus
Abstract The ostracod genus Bradleya Hornibrook is an important taxon of Cenozoic assemblages, occurring practically in all oceanic regions. The wide distribution both in shallow and deep waters turns Bradleya interesting for studies involving phylogeny and paleoceanography. The present work aims at...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Academia Brasileira de Ciências
2023-12-01
|
| Series: | Anais da Academia Brasileira de Ciências |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000501201&tlng=en |
| _version_ | 1797386363939586048 |
|---|---|
| author | CRISTIANINI T. BERGUE JOÃO CARLOS COIMBRA |
| author_facet | CRISTIANINI T. BERGUE JOÃO CARLOS COIMBRA |
| author_sort | CRISTIANINI T. BERGUE |
| collection | DOAJ |
| description | Abstract The ostracod genus Bradleya Hornibrook is an important taxon of Cenozoic assemblages, occurring practically in all oceanic regions. The wide distribution both in shallow and deep waters turns Bradleya interesting for studies involving phylogeny and paleoceanography. The present work aims at the study of fossil and recent species in South America and adjacent regions, based on bibliographic review and the restudy of samples from the Brazilian continental margin, the Navidad Formation (lower Miocene) and El Peral Beds (meso-upper Miocene), both cropping out in the Central Chile. The chronostratigraphic, (paleo)bathymetric and (paleo)zoogeographic distribution of the species is reviewed and updated. The bridge composition was studied in all species recorded and revealed to be important taxonomic character. The taxa identified were gathered into three morphological groups: two proposed previously (i.e., the dictyon-group and the arata-group) and a new one in the present work (i.e., the normani-group). The dictyon-group and the arata-group gather deep-sea species, while the normani-group is predominantly neritic, including most of the species of Brazilian margin. Bradleya victorjarai sp. nov. is proposed for the Miocene of Chile, and Bradleya ybate (Bergue et al.) is reassigned to Rigracythere gen. nov. Questionable or misidentified species ascribed to Bradleya are briefly discussed. |
| first_indexed | 2024-03-08T22:09:17Z |
| format | Article |
| id | doaj.art-44aa9043db7d40d1945983f1e3d535fa |
| institution | Directory Open Access Journal |
| issn | 1678-2690 |
| language | English |
| last_indexed | 2024-03-08T22:09:17Z |
| publishDate | 2023-12-01 |
| publisher | Academia Brasileira de Ciências |
| record_format | Article |
| series | Anais da Academia Brasileira de Ciências |
| spelling | doaj.art-44aa9043db7d40d1945983f1e3d535fa2023-12-19T07:44:36ZengAcademia Brasileira de CiênciasAnais da Academia Brasileira de Ciências1678-26902023-12-0195suppl 210.1590/0001-3765202320220369The genus Bradleya Hornibrook, 1952 (Crustacea: Ostracoda) in South America and adjacent oceanic areas, with description of a new bradleyine genusCRISTIANINI T. BERGUEhttps://orcid.org/0000-0002-5007-3131JOÃO CARLOS COIMBRAhttps://orcid.org/0000-0002-8980-6531Abstract The ostracod genus Bradleya Hornibrook is an important taxon of Cenozoic assemblages, occurring practically in all oceanic regions. The wide distribution both in shallow and deep waters turns Bradleya interesting for studies involving phylogeny and paleoceanography. The present work aims at the study of fossil and recent species in South America and adjacent regions, based on bibliographic review and the restudy of samples from the Brazilian continental margin, the Navidad Formation (lower Miocene) and El Peral Beds (meso-upper Miocene), both cropping out in the Central Chile. The chronostratigraphic, (paleo)bathymetric and (paleo)zoogeographic distribution of the species is reviewed and updated. The bridge composition was studied in all species recorded and revealed to be important taxonomic character. The taxa identified were gathered into three morphological groups: two proposed previously (i.e., the dictyon-group and the arata-group) and a new one in the present work (i.e., the normani-group). The dictyon-group and the arata-group gather deep-sea species, while the normani-group is predominantly neritic, including most of the species of Brazilian margin. Bradleya victorjarai sp. nov. is proposed for the Miocene of Chile, and Bradleya ybate (Bergue et al.) is reassigned to Rigracythere gen. nov. Questionable or misidentified species ascribed to Bradleya are briefly discussed.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000501201&tlng=endeep-seamarine paleobiodiversityNeogenesouthwestern Atlanticsoutheastern Pacifictaxonomy |
| spellingShingle | CRISTIANINI T. BERGUE JOÃO CARLOS COIMBRA The genus Bradleya Hornibrook, 1952 (Crustacea: Ostracoda) in South America and adjacent oceanic areas, with description of a new bradleyine genus Anais da Academia Brasileira de Ciências deep-sea marine paleobiodiversity Neogene southwestern Atlantic southeastern Pacific taxonomy |
| title | The genus Bradleya Hornibrook, 1952 (Crustacea: Ostracoda) in South America and adjacent oceanic areas, with description of a new bradleyine genus |
| title_full | The genus Bradleya Hornibrook, 1952 (Crustacea: Ostracoda) in South America and adjacent oceanic areas, with description of a new bradleyine genus |
| title_fullStr | The genus Bradleya Hornibrook, 1952 (Crustacea: Ostracoda) in South America and adjacent oceanic areas, with description of a new bradleyine genus |
| title_full_unstemmed | The genus Bradleya Hornibrook, 1952 (Crustacea: Ostracoda) in South America and adjacent oceanic areas, with description of a new bradleyine genus |
| title_short | The genus Bradleya Hornibrook, 1952 (Crustacea: Ostracoda) in South America and adjacent oceanic areas, with description of a new bradleyine genus |
| title_sort | genus bradleya hornibrook 1952 crustacea ostracoda in south america and adjacent oceanic areas with description of a new bradleyine genus |
| topic | deep-sea marine paleobiodiversity Neogene southwestern Atlantic southeastern Pacific taxonomy |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000501201&tlng=en |
| work_keys_str_mv | AT cristianinitbergue thegenusbradleyahornibrook1952crustaceaostracodainsouthamericaandadjacentoceanicareaswithdescriptionofanewbradleyinegenus AT joaocarloscoimbra thegenusbradleyahornibrook1952crustaceaostracodainsouthamericaandadjacentoceanicareaswithdescriptionofanewbradleyinegenus AT cristianinitbergue genusbradleyahornibrook1952crustaceaostracodainsouthamericaandadjacentoceanicareaswithdescriptionofanewbradleyinegenus AT joaocarloscoimbra genusbradleyahornibrook1952crustaceaostracodainsouthamericaandadjacentoceanicareaswithdescriptionofanewbradleyinegenus |