Figure 1.
Map showing the distribution range of Channa diplogramma and Channa micropeltes.
Figure 2.
Types specimen examined in the study.
A) Channa diplogramma (BMNH 1865.7.17.24) B) C. micropeltes (RMNH D2318).
Figure 3.
Principle Component Analysis of morphometric and meristic characters of Channa diplogramma and C. micropeltes.
Table 1.
Morphometric characters of Channa diplogramma and C. micropeltes.
Table 2.
Meristic characters of Channa diplogramma and C. micropeltes.
Figure 4.
Ontogenetic color phases of Channa diplogramma.
A: Fingerling; B: Fingerling, C: Juvenile, D: Juvenile, E: Sub-Adult, F: Sub-Adult, G: Adult, H: Adult (length in millimeters is given as a scale below each specimen); all individuals were collected from the river Meenachil in Kerala, India.
Figure 5.
Phylogram showing the relationships of the channids used in this study rooted with Notopterus notopterus (AP008925.1).
The nodes for which the divergence time is presented in tables 3 and 4 are labeled as A through H below the branches; the mean time intervals of divergence calculated by the two calibration methods are represented as rectangular bars on the nodes.
Table 3.
Results of divergence time estimation in million years for the various nodes of the phylogenetic tree presented in Figure 5 the calibration point at node X was the earliest channid fossil age from Eocene (∼50 MYA; [51]).
Table 4.
Results of divergence time estimation in million years for the various nodes of the phylogenetic tree presented in Figure 5 the calibration point at node one was the split between Parachanna and Channa calculated by Li et al., (110-84 MYA) [48].