Geometric morphometry of tropical fish species of the genus Pimelodella (Heptapteridae) from Orinoquía
Pimelodella is one of the most diverse genera of the family Heptapteridae with approximately 83 valid species. However, the taxonomy of this genus is problematic since it lacks a phylogenetic diagnosis and its species present conserved morphologies. Therefore, this study aims to analyze the morphological variation of seven species of Pimelodella from the Orinoco River basin in Colombia. For this, 93 specimens grouped into seven species were used, which were oriented and scaled through a Generalized Procrustes Analysis (GPA). Size explains part of the variation in shape in the Pimelodella species analyzed. The Canonical Variable Analysis (CVA) performed on the residuals indicates that the first two components account for 92.4 % of the total variation, where there is an overlap between P. figueroai, P. megalops, P. metae, and Pimelodella sp. However, most of the specimens remained relatively cohesive in their respective species. The typicality probability revealed an overall classification accuracy of 86.0 % for the cross-validated data. Geometric morphometrics allowed us to detect shape differences in Pimelodella species.
| Main Authors: | , |
|---|---|
| Format: | Digital revista |
| Language: | spa |
| Published: |
Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Biología
2024
|
| Online Access: | https://revistas.unal.edu.co/index.php/actabiol/article/view/105682 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|