Non-metric characters in two species of Sotalia (Gray, 1866) (Cetacea, Delphinidae)
Analyses of non-metric characters of the skull and cervical vertebrae were performed among samples of dolphins of the genus Sotalia from the north, northeast and south Brazilian coast (S. guianensis) and also samples from the Amazon River Basin (S. fluviatilis) as part of an osteological descriptive...
| Autor principal: | Fettuccia, Daniela de C. |
|---|---|
| Outros Autores: | Silva, Vera Maria Ferreira da, Simões-Lopes, Paulo César |
| Grau: | Artigo |
| Idioma: | pt_BR |
| Publicado em: |
Revista Brasileira de Biologia
2020
|
| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/15132 |
| id |
oai:repositorio:1-15132 |
|---|---|
| recordtype |
dspace |
| spelling |
oai:repositorio:1-15132 Non-metric characters in two species of Sotalia (Gray, 1866) (Cetacea, Delphinidae) Caracteres não métricos nas duas espécies de Sotalia (Gray, 1866) Fettuccia, Daniela de C. Silva, Vera Maria Ferreira da Simões-Lopes, Paulo César Animals Brasil Cervical Spine Classification Comparative Study Dolphin Female Histology Male Skull Animal Brasil Cervical Vertebrae Dolphins Female Male Skull Cetacea Delphinidae Sotalia Sotalia Fluviatilis Sotalia Guianensis Analyses of non-metric characters of the skull and cervical vertebrae were performed among samples of dolphins of the genus Sotalia from the north, northeast and south Brazilian coast (S. guianensis) and also samples from the Amazon River Basin (S. fluviatilis) as part of an osteological descriptive study. The results demonstrated that there was a higher percentage of occurrence of fenestrae in the occipital region (66%) and cervical ribs in the cervical vertebrae (87%) in the riverine species. The vomer in wide shape was more frequent in the riverine species (57%), followed by the intermediate (32%) and narrow shape (11%), that was found to be more frequent in the marine spe-cies (66 to 76%). In relation to the lacerate anterior foramen, it was observed that an open/elongated shape is more common in the riverine species (88%). Most samples in the marine species present this foramen divided by a spike shaped projection (72 to 98%). The ventrally visible location of the hypoglossal foramen was more often observed externally displaced in S. guianensis (88 to 98%), while in S. fluviatilis, most samples (87%) presented this foramen internally displaced to the jugular notch, and not visible in ventral view. The fluvial species seems to present neoteny (or maintenance of juvenile characters in adults) in relation to the position of the pterygoids and in development of lacerate anterior foramen. 2020-05-07T14:07:15Z 2020-05-07T14:07:15Z 2009 Artigo https://repositorio.inpa.gov.br/handle/1/15132 10.1590/S1519-69842009000400020 pt_BR Volume 69, Número 3, Pags. 907-917 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Revista Brasileira de Biologia |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
pt_BR |
| topic |
Animals Brasil Cervical Spine Classification Comparative Study Dolphin Female Histology Male Skull Animal Brasil Cervical Vertebrae Dolphins Female Male Skull Cetacea Delphinidae Sotalia Sotalia Fluviatilis Sotalia Guianensis |
| spellingShingle |
Animals Brasil Cervical Spine Classification Comparative Study Dolphin Female Histology Male Skull Animal Brasil Cervical Vertebrae Dolphins Female Male Skull Cetacea Delphinidae Sotalia Sotalia Fluviatilis Sotalia Guianensis Fettuccia, Daniela de C. Non-metric characters in two species of Sotalia (Gray, 1866) (Cetacea, Delphinidae) |
| topic_facet |
Animals Brasil Cervical Spine Classification Comparative Study Dolphin Female Histology Male Skull Animal Brasil Cervical Vertebrae Dolphins Female Male Skull Cetacea Delphinidae Sotalia Sotalia Fluviatilis Sotalia Guianensis |
| description |
Analyses of non-metric characters of the skull and cervical vertebrae were performed among samples of dolphins of the genus Sotalia from the north, northeast and south Brazilian coast (S. guianensis) and also samples from the Amazon River Basin (S. fluviatilis) as part of an osteological descriptive study. The results demonstrated that there was a higher percentage of occurrence of fenestrae in the occipital region (66%) and cervical ribs in the cervical vertebrae (87%) in the riverine species. The vomer in wide shape was more frequent in the riverine species (57%), followed by the intermediate (32%) and narrow shape (11%), that was found to be more frequent in the marine spe-cies (66 to 76%). In relation to the lacerate anterior foramen, it was observed that an open/elongated shape is more common in the riverine species (88%). Most samples in the marine species present this foramen divided by a spike shaped projection (72 to 98%). The ventrally visible location of the hypoglossal foramen was more often observed externally displaced in S. guianensis (88 to 98%), while in S. fluviatilis, most samples (87%) presented this foramen internally displaced to the jugular notch, and not visible in ventral view. The fluvial species seems to present neoteny (or maintenance of juvenile characters in adults) in relation to the position of the pterygoids and in development of lacerate anterior foramen. |
| format |
Artigo |
| author |
Fettuccia, Daniela de C. |
| author2 |
Silva, Vera Maria Ferreira da Simões-Lopes, Paulo César |
| author2Str |
Silva, Vera Maria Ferreira da Simões-Lopes, Paulo César |
| title |
Non-metric characters in two species of Sotalia (Gray, 1866) (Cetacea, Delphinidae) |
| title_short |
Non-metric characters in two species of Sotalia (Gray, 1866) (Cetacea, Delphinidae) |
| title_full |
Non-metric characters in two species of Sotalia (Gray, 1866) (Cetacea, Delphinidae) |
| title_fullStr |
Non-metric characters in two species of Sotalia (Gray, 1866) (Cetacea, Delphinidae) |
| title_full_unstemmed |
Non-metric characters in two species of Sotalia (Gray, 1866) (Cetacea, Delphinidae) |
| title_sort |
non-metric characters in two species of sotalia (gray, 1866) (cetacea, delphinidae) |
| publisher |
Revista Brasileira de Biologia |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/15132 |
| _version_ |
1787145065851781120 |
| score |
11.755432 |