104 
REMARKS. Sumatra materials appear to have a more rounded head, 
deeper body, and longer fins than specimens from Borneo. We 
attribute this to larger size of the Sumatra specimens studied, but 
further materials in the appropriate size range (smaller specimens 
from Sumatra and larger specimens from Borneo) may reveal the 
two populations to be different species. If so, a new name will be 
required for the Kapuas River species. 
Schismatorhynchos holorhynchos sp. nov. (Figs 1B,3,5,6) 
Schismatorhynchus heterorhynchus; Inger & Chin, 1962: 86 
HOLOTYPE. USNM 325389 (101.7 mm Sl); Malaysia; Sarawak; 
confluence of Batang Balui and Batang Kerumo; O2°22'N 113°45'E; 
col. L. Parenti, K. Luhat, and A. Among; 3-VII-1991; field no. LRP 
91-28. 
PARATYPES. USNM 346637 (12 including | cleared and counter 
stained, 39.5—78.8 mm Sl); data as for holotype. 
NON-TYPE MATERIALS. Borneo (Kinabatangan River basin, Sabah, 
Malaysia) - FMMN 68548 (28, 28.3—34.8 mm Sl); small stream 1 
mi. above Sungei Tabalin Besar, Sta. 1; col. R. Inger and P.K. Chin; 
21 April 1956. FMNH 68549 (1, 49.3 mm SI); Deramakot Camp, hill 
D.J. SIEBERT AND A.H. TJAKRAWIDJAJA 
stream; col. R. Inger; 2 May 1956. FMNH 68550 (5, 42.7-79.3 mm 
S1); Deramakot Camp, hill stream below waterfall; col. R. Inger and 
P.K. Chin; 2 May 1956. FMNH 68551 (1, 47.8 mm SI); Deramakot 
Camp, stream below water fall; col. R. Inger; 3 May 1956. FMNH 
68552 (30 of 147, 30.3-49.4 mm Sl); Deramakot Camp; col. R. 
Inger and P.K. Chin; 8 May 1956. FMNH 94183 (1, 55.8 mm SI); 
Deramakot Camp, hill stream; col. R. Inger; 2 May 1956. 
Borneo (Rejang River basin, Sarawrak, Malaysia) - USNM 
325359 (2, 21.8-55.8 mm Sl); Baleh River, creek entering northern 
bank approx 5 km E of Sut River; 2°2'N 113°07'E; col. L. Parenti et 
al.; 25 Jul 1991. USNM 324978 (2, 33.5—35.5 mm S]); Baleh River, 
stream entering river opposite Sekolah Negara Bawai; 2°0'N 
113°03'E; col. L. Parenti et al.; 24 Jul 1991. USNM 325387 (2, 59.2— 
59.5 mm S]); Baleh River, creek entering southern bank approx. 20 
km E of Sut River; 2°01'N 113°06'E; col. L. Parenti et al.; 24 Jul 
1991. USNM 325388 (2, 67.6-68.7 mm S1); Batang Balui, Batang 
Tamn were it enters Bantan Balui; 02°22'N 113°47'E; col. L. Parenti 
et al.; 6 Aug 1991. USNM 325390 (18, 36.2—77.2); Batang Balui, 
Batang Lut at Batang Balui; 2°22N 113°46'E; col. L. Parenti et al.; 3 
Aug 1991. USNM 325411 (28, 38.7-77.6 mm Sl); Batang Balui, 
stream near mouth; 2°20'N 113°49'E; L. Parenti et al.; 6 Aug 1991. 
DIAGNOSIS. 
A species of Schismatorhynchos with eight branched 

Fig. 6 Photographs of the holotype (A. USNM 325389, 101.7 mm Sl) and a small (B. USNM 325890, 43.6 mm SL) specimen of S. holorhynchos. 
