| Full text | |
| Author(s): |
Total Authors: 2
|
| Affiliation: | [1] Univ Sao Paulo, Museu Zool, Secao Peixes, Sao Paulo, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | PLoS One; v. 14, n. 7 JUL 10 2019. |
| Web of Science Citations: | 1 |
| Abstract | |
Knodus nuptialis n. sp. is described from the Rio Curua drainage, Rio Xingu basin, Brazil. It can be diagnosed from its congeners by having dentary teeth decreasing gradually in size posteriorly, outer premaxillary teeth row with five cusps, 12-15 branched anal-fin rays and a single humeral spot. The species presents notable sexual dimorphism consisting of densely concentrated nuptial tubercles on head, body, and fins, gill-gland, and bony hooks in the anal fin of mature males. It was found that these sexually dimorphic features are useful and functional in males of the new species only during the reproductive season and after this period, they become atrophied, and eventually disappear. The list of characiform species presenting breeding tubercles is updated and nine species and two genera of the Characidae, Deuterodon and Bryconacidnus, are for the first time reported to have breeding tubercles. (AU) | |
| FAPESP's process: | 17/09321-5 - Miniature Characiformes (Teleostei: Ostariophysi): evolution, diversity and biogeography |
| Grantee: | Manoela Maria Marinho Koh |
| Support type: | BIOTA-FAPESP Program - Young Investigators Grants |
| FAPESP's process: | 16/19075-9 - Diversity and evolution of Gymnotiformes (Teleostei, Ostariophysi) |
| Grantee: | Naercio Aquino Menezes |
| Support type: | Research Projects - Thematic Grants |
| FAPESP's process: | 11/50282-7 - An inventory of the Characiform fish fauna (Teleostei, Ostariophysi) from South America |
| Grantee: | Naercio Aquino Menezes |
| Support type: | BIOTA-FAPESP Program - Thematic Grants |