116 
Number of observations 
Number of observations 
wn 
Cc 
2 
= 
o 
> 
— 
® 
(%) 
xe} 
lo) 
— 
lo) 
— 
® 
Q 
i= 
=) 
Zz 
Number of observations 
> MO W 
59° Oo Oo 8 
11.0 11.5 12.0 12.5 13.0 
C 
Number of observations Number of observations Number of observations 
Number of observations 
0 
46 48 50 52 54 56 
D 
0.35 0.40 0.45 0.50 
BD 
Figure 2 
Fishery Bulletin 120(2) 
Number of observations 
(o>) oa (oo) oi [o) o 
34 36 38 40 42 
A 
Number of observations 
=— Oo fF oO OD 
(eo) oOo oO OO Oo 
0 
0 
3.0 3.5 4.0 4.5 5.0 5.5 6.0 
Pis 
© 
& 
Number of observations 
0.15 0.20 0.25 0.30 0.35 
HL 
—- Pp 
eo 7 9 8 
—_ 
oO 
Number of observations 
Frequency of occurrence of examined meristic characters and body proportions in 3 nominal species of 
the genus Typhlachirus, based on specimens captured in 2018 in the Mekong River delta of Vietnam and 
described in the literature (Chabanaud, 1948; Hardenberg, 1931b; Pellegrin and Chevey, 1940; Tan and 
Grinang, 2020). Features include standard body length (SL), number of rays in dorsal fin (D), number of 
rays in anal fin (A), number of rays in caudal fin (C), number of rays in pectoral fin on the ocular (right) 
side of the body (P1,) and on the blind (left) side (P1,), number of pored scales on the horizontal branch of 
the ocular side lateral line not including scales on caudal fin (LL), body depth at pectoral fin base (BD), 
head length (HL), number of precaudal vertebrae (PrCV), number of caudal vertebrae (CV), and number 
of vertebrae (V). 
