{"id":{"repo_id":"brazil-uerj","oai_identifier":"oai:pantheon.ufrj.br:11422/3574"},"canonical_url":"https://search.dev.ndltd.org/etd/brazil-uerj/oai:pantheon.ufrj.br:11422/3574","repository":{"repo_id":"brazil-uerj","name":"Brazil UERJ","base_url":"https://pantheon.ufrj.br/oai/request"},"display":{"title":"O gênero Squalus no Brasil: caracterização do grupo megalops e determinação do status taxonômico das formas brasileiras","abstract":"Three species groups of Squalus from the Brazilian coast are defined and the megalops group is characterized. According to analysis of external morphology (pectoral fins shape, dorsal fins spines length in comparison with the high of these fins and position of pelvic fins in comparison with dorsal fins), dermal denticles, chondrocranium, vertebral column, dentition and claspers, it is demonstrated that southern species Squalus megalops (sensu Vooren, 1992), southeastern Squalus cubensis (sensu Figueiredo, 1977) and Squalus sp. (sensu Figueiredo, 1981), from central and southern Brazil, represents a single species, wherein Squalus sp. of the megalops group. The most important characters to define this species were external morphology, dermal denticles, chondrocranium and claspers. The study also indicated two aditional species occurs in Brazilian waters: Squalus acanthias and Squalus sp. of the blainvillei group.","abstract_html":"Three species groups of Squalus from the Brazilian coast are defined and the megalops group is characterized. According to analysis of external morphology (pectoral fins shape, dorsal fins spines length in comparison with the high of these fins and position of pelvic fins in comparison with dorsal fins), dermal denticles, chondrocranium, vertebral column, dentition and claspers, it is demonstrated that southern species Squalus megalops (sensu Vooren, 1992), southeastern Squalus cubensis (sensu Figueiredo, 1977) and Squalus sp. (sensu Figueiredo, 1981), from central and southern Brazil, represents a single species, wherein Squalus sp. of the megalops group. The most important characters to define this species were external morphology, dermal denticles, chondrocranium and claspers. The study also indicated two aditional species occurs in Brazilian waters: Squalus acanthias and Squalus sp. of the blainvillei group.","abstract_has_math":false,"creators":["Marques, Alessandra Resende"],"institution":"Universidade Federal do Rio de Janeiro","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Nunan, Gustavo Wilson Alves"],"committee_chairs":[],"committee_members":[],"year":1999,"date_issued":"1999-05-21","date_published":"1999-05-21","updated_at":"2026-07-24T01:16:04Z","subjects":["Squalus","Esqualídeos"],"languages":["por"],"rights":["Acesso Aberto"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11422/3574","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Nunan, Gustavo Wilson Alves"]},{"key":"dc:creator","label":"Author","values":["Marques, Alessandra Resende"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2018-01-31T00:29:49Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2026-05-16T03:05:37Z"]},{"key":"dc:date.issued","label":"Date","values":["1999-05-21"]},{"key":"dc:publisher","label":"Institution","values":["Universidade Federal do Rio de Janeiro"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Museu Nacional"]},{"key":"dc:type","label":"Dc Type","values":["Dissertação"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Squalus","Esqualídeos"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["por"]},{"key":"dc:rights","label":"Dc Rights","values":["Acesso Aberto"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11422/3574"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Three species groups of Squalus from the Brazilian coast are defined and the megalops group is characterized. According to analysis of external morphology (pectoral fins shape, dorsal fins spines length in comparison with the high of these fins and position of pelvic fins in comparison with dorsal fins), dermal denticles, chondrocranium, vertebral column, dentition and claspers, it is demonstrated that southern species Squalus megalops (sensu Vooren, 1992), southeastern Squalus cubensis (sensu Figueiredo, 1977) and Squalus sp. (sensu Figueiredo, 1981), from central and southern Brazil, represents a single species, wherein Squalus sp. of the megalops group. The most important characters to define this species were external morphology, dermal denticles, chondrocranium and claspers. The study also indicated two aditional species occurs in Brazilian waters: Squalus acanthias and Squalus sp. of the blainvillei group."]},{"key":"dc:title","label":"Title","values":["O gênero Squalus no Brasil: caracterização do grupo megalops e determinação do status taxonômico das formas brasileiras"]}]}],"canonical_facts":{"dc:contributor.advisor":["Nunan, Gustavo Wilson Alves"],"dc:creator":["Marques, Alessandra Resende"],"dc:date.accessioned":["2018-01-31T00:29:49Z"],"dc:date.available":["2026-05-16T03:05:37Z"],"dc:date.issued":["1999-05-21"],"dc:description.abstract":["Three species groups of Squalus from the Brazilian coast are defined and the megalops group is characterized. According to analysis of external morphology (pectoral fins shape, dorsal fins spines length in comparison with the high of these fins and position of pelvic fins in comparison with dorsal fins), dermal denticles, chondrocranium, vertebral column, dentition and claspers, it is demonstrated that southern species Squalus megalops (sensu Vooren, 1992), southeastern Squalus cubensis (sensu Figueiredo, 1977) and Squalus sp. (sensu Figueiredo, 1981), from central and southern Brazil, represents a single species, wherein Squalus sp. of the megalops group. The most important characters to define this species were external morphology, dermal denticles, chondrocranium and claspers. The study also indicated two aditional species occurs in Brazilian waters: Squalus acanthias and Squalus sp. of the blainvillei group."],"dc:identifier.uri":["http://hdl.handle.net/11422/3574"],"dc:language":["por"],"dc:publisher":["Universidade Federal do Rio de Janeiro"],"dc:publisher.department":["Museu Nacional"],"dc:rights":["Acesso Aberto"],"dc:subject":["Squalus","Esqualídeos"],"dc:title":["O gênero Squalus no Brasil: caracterização do grupo megalops e determinação do status taxonômico das formas brasileiras"],"dc:type":["Dissertação"]},"updated_at":"2026-07-24T01:16:04Z"}