| 1a. |
Pectoral-fin rays 40 or more
....2 |
| 1b. |
Pectoral-fin rays 33 or fewer
.
...3 |
| 2a. |
Chin with numerous small barbels; pectoral-fin rays
46-65; total dorsal-fin
elements 32-35; 17 caudal vertebrae. (Pakistan, Myanmar)
.....
O.
tenuis |
| 2b. |
Chin lacking barbels; pectoral-fin rays 40-51; total
dorsal-fin elements 44-48;
anal-fin elements 37-42; 20-21 caudal vertebrae. (Vietnam)
.
O.
Rebecca |
| 3a. |
In preservative, distal margins of dorsal and anal
fins tinged chocolate-brown;
dorsal surface of skull bony lacking portions of adductor mandibulae
muscle;
epineurals present from 1st precaudal vertebra to 10th caudal vertebra.
(west
coast of India)
.....
.O. roseus |
| 3b. |
In preservative, distal margins of dorsal and anal
fins the same color as
the rest of fin but not chocolate-brown; dorsal surface of skull
covered by
adductor mandibulae muscle; epineurals present from 1st precaudal
vertebra to 3rd, 4th, or 5th caudal vertebra
............
.
.
4 |
| 4a. |
Caudal fin very long, standard length typically less
than 80% of total length;
total dorsal-fin elements 40-47; anal-fin elements 33-40; caudal
vertebrae
17; 3 anal- fin pterygiophores preceding first hemal spine. (east
coast of
India, Bangladesh, Myanmar)
....O. rubicundus |
| 4b. |
Caudal fin long, standard length more than 80% of
total length; total
dorsal-fin elements 44-54; anal-fin elements 36-45; caudal vertebrae
20-24; 2 (rarely 3) anal-fin pterygiophores preceding first hemal
spine. (China, Hong Kong, Taiwan, Korea, Japan)
........O.
lacepedii |
| |
|
| |
|
