
SCHISMATORHYNCHOS REVISION 
Table 2 Lateral line scale count frequencies for species of 
Schismatorhynchos. 
30 31 32 33 34 
S. heterorhynchos 4 12 18 4 
S. holorhynchos 4 50 2) 3 
S. endecarhapis 3 13 3 
DISTRIBUTION. Studied material of S. heterorhynchos originates 
from three localities on Sumatra and from the Kapuas River basin, 
Kalimantan Barat, Borneo (Fig. 5). We consider only the two most 
recent reported Sumatra localities to be verifiable. Solok is reported 
as the type locality of the species (Bleeker, 1853), but we are not 
confident the types actually originate from there. Solok is located in 
the very upper reaches of the Indragir River basin Sumatera Barat 
Province, just north of the Batang Hari basin and on the overland 
route between the cities of Jambi, Jambi Province and Padan, 
Sumatera Barat Provence. Much of this route is in the Batang Hari 
basin and it is quite possible the material Bleeker listed as coming 
from Solok was actually collected along the route to Solok and 
within the Batang Hari basin. Within the Kapuas River basin verified 
localities at which S. heterorhynchos has been captured are all 
within the Sungai Sibau basin. Schismatorhynchos heterorhynchos 
has been collected only from the upper parts of river basins, near to 
or in foothill regions, both on Sumatra and Borneo. These parts of 
river basins are among the least well collected and further explora- 
tion of these habitats may reveal the species to be quite widespread. 
4a 
ot 
Qt 
94 
° 

103 

* LNSL ° 
Fig. 4 Log-log plot (natural logarithms) of the relationship between 
height of the dorsal fin and standard length; # = S. heterorhynchos, 
LnDFI = -3.2 + 1.44LnSI, SE of coefficient = 0.05, R* = 0.96, n = 36; 
A = S. endecarhapis, LnDfl = —-1.7 + 1.09LnSI, SE of coefficient = 
0.07, R? = 0.92, n = 25; and @ = S. holorhynchos, LnDfl = -1.9 + 
1.12LnSIl, SE of coefficient = 0.04, R* = 0.99, n= 13. 
121° 
+9° 
Fig. 5 Localities from which Schismatorhychos material was examined in this study; # = S. heterorhynchos, & = S. endecarhapis, and 
@ = S. holorhynchos; target symbols = type localities. 
