Premium
Sisor rabdophorus —A study in adaptation and natural relationship III. The vertebral column, median fins their musculature
Author(s) -
Mahajan C. L.
Publication year - 1967
Publication title -
journal of zoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0952-8369
DOI - 10.1111/j.1469-7998.1967.tb01646.x
Subject(s) - biology , loricariidae , vertebral column , convergent evolution , catfish , fish fin , anatomy , fish <actinopterygii> , adaptation (eye) , fin , evolutionary biology , column (typography) , habit , zoology , neuroscience , fishery , phylogenetics , genetics , geometry , materials science , mathematics , gene , composite material , psychology , psychotherapist , connection (principal bundle)
A detailed description of the vertebral column, median fin skeleton and musculature is given. Comparisons based on the study of these structures in Gagata and Loricaria have been made. It has been clearly demonstrated that these structures in Sisor bear an unmistakable imprint of the bottom‐living habit of the fish and as such show a remarkable series of convergent modifications with the most highly specialized catfish family, Loricariidae, while Gagata shows an intermediate stage between the typical siluroid condition and the extreme type of modifications found in Sisor and Loricaria . That Sisor diverged early from the main stem of sisorid evolution is further supported by this study.