| Full text | |
| Author(s): |
Total Authors: 2
|
| Affiliation: | [1] Univ Sao Paulo, Museu Zool, BR-04218970 Sao Paulo - Brazil
[2] Univ Estadual Paulista, Inst Biociencias Letras & Ciencias Exatas, Programa Posgrad Biol Anim, Sao Jose Do Rio Preto, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Neotropical Ichthyology; v. 11, n. 1, p. 45-54, JAN-MAR 2013. |
| Web of Science Citations: | 10 |
| Abstract | |
Astyanax multidens is redescribed based on syntypes and additional specimens from the rio Amazonas at Silves, Amazonas State and Obidos, Para State, and the rios Trombetas, Tapajos, Xingu, and Araguaia. Astyanax multidens is distinguished from congeners by the unique combination of five to seven maxillary teeth, 31 to 34 pored lateral-line scales, 20 to 23 branched anal-fin rays, and a dark triangular blotch restricted to the middle caudal-fin rays. Astyanax multidens was collected syntopically with Jupiaba paranatinga in the rio Tapajos basin and with Jupiaba cf. essequibensis in the rio Xingu basin, which have paired anteriorly oriented pelvic-fin spines, a antipredatory mechanism. Based on the external morphological similarity between Astyanax multidens and the two species of Jupiaba, their sympatric occurrence, and their distinct phylogenetic position, we interpret this a case of Batesian mimicry. (AU) | |
| FAPESP's process: | 09/15075-0 - Phylogenetic relationships and taxonomic revision of the species of Copella Myers, 1956 (Characiformes: Lebiasinidae) |
| Grantee: | Manoela Maria Marinho Koh |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 11/50282-7 - An inventory of the Characiform fish fauna (Teleostei, Ostariophysi) from South America |
| Grantee: | Naercio Aquino Menezes |
| Support Opportunities: | BIOTA-FAPESP Program - Thematic Grants |