Abstract
The family Leuconidae Sars, 1878 is one of the eight widely recognized families of Cumacea and can be found in all oceans, but often in deeper waters (> 200 m). Despite its worldwide distribution, Southwestern Atlantic records were restricted to Argentina and Uruguay, indicating a gap in the knowledge of the group along the Brazilian coast. Samples were collected in the Campos, Espírito Santo and Santos Basins with box core and/or van Veen grabs between 16–3000 m in depth. A total of five new species and a new genus are described herein. Leucon (Alytoleucon) rhuanae sp. nov., Leucon (Crymoleucon) pseudograndidentatus sp. nov., Leucon (Macrauloleucon) watlingi sp. nov., Eudorella helenae sp. nov. and Gyneleucon tripedium gen. et sp. nov. The lack of knowledge on cumacean leuconids along the Brazilian coast is clearly a result of taxonomic impediment. The present study is an effort towards understanding and revealing the Cumacea fauna from the Brazilian margin, bringing new data on the family Leuconidae found in the continental shelf and slope of the Espírito Santo, Campos and Santos Basins, areas with high oil and gas exploration. Promoting the characterization of these areas is essential to a wide understanding of the local species richness and consequently provides tools for preservation and monitoring activities.
Subject
Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics
Reference58 articles.
1. Akiyama, T. & Gamo, S. (2005) A new species of deep-sea cumacean genus Eudorella from Okinawa Trough, Northwest Pacific. National Science Museum monographs, 29, 261–269.
2. Akiyama, T. & Gamo, S. (2006) A new species of Eudorella (Crustacea, Cumacea) from the Seto Inland Sea of Japan. Zoology Bulletin of the National Science Museum, Series A, Zoology, 32 (2), 39–46.
3. Akiyama, T. & Gamô, S. (2012) The cumacean Genus Eudorella (Crustacea: Peracarida) from Japanese Waters, Northwest Pacific, and E. suluensis sp. nov. from the Sulu Sea, Indo-West Pacific. Zootaxa, 3319 (1), 1–56. https://doi.org/10.11646/zootaxa.3319.1.1
4. Anger, K. & Valentin, C. (1976) In situ studies on the diurnal activity pattern of Diastylis rathkei (Cumacea, Crustacea) and its importance for the “hyperbenthos”. Helgoländer wissenschaftliche Meeresuntersuchungen, 28 (2), 138–144. https://doi.org/10.1007/bf00395596
5. Bate, C.S. (1856) XLI—On the British Diastylidæ. Annals and Magazine of Natural History, 17 (102), 449–465. https://doi.org/10.1080/00222935608697553