RELATIONSHIPS OF SUNDASALANX 



21 



Table 1 Selected mensural characters of Sundasalanx malleti, S. mesops, S. megalops, and S. platyrhynchus; the mean ± standard deviation is followed by 

 the sample minimum - maximum; sample size is reported in parentheses if different from that reported under each species' name. 



S. malleti n = 10 



mesops n 



30 



S. megalops n = 2 



S. platyrhynchus n = 20 



Eye(% SL) 



4.2±0.3 



3.8- 4.7 





Eye(%HL) 



21.3±1.1 



19.9-23.2 





Snt(% SL) 



4.3±0.4 



3.5- 4.8 



(9) 



Snt(% HL) 



21.2±1.7 



18.4-23.9 



(9) 



Snt:eye 



1.0±0.1 



0.8- 1.2 



(9) 



Head d. (% SL) 



8.2±0.8 



6.3- 9.0 





Head 1. (% SL) 



20.0±0.8 



18.8-21.1 





Head w. (& SL) 



9.7±0.7 



8.6-10.6 



(9) 



5.2±0.3 



4.5- 5.7 



25.5±1.3 



21.4-27.5 



3.8±0.4 



3.1- 4.8 



18.6+1.7 



15.6-22.9 



0.7±0. 1 



0.6- 1.0 



7.9±0.5 



7.3- 9.1 



20.7±0.7 



18.7-21.8 



10.5±0.4 



9.8-11.2 



5.9- 6.0 

 27.5-29.0 



3.5-4.9 

 17.3-22.6 

 0.6- 0.8 

 9.4-9.6 

 20.4-21.6 



9.4 (1) 



5.1 ±0.4 



4.2- 5.7 



(18) 



23.8±1.2 



21.7-25.9 



(16) 



4.0±0.7 



2.9- 5.2 





18.1±1.9 



15.3-21.4 



(19) 



0.8+0.1 



0.6- 1.0 



(18) 



8.3±0.7 



7.2- 9.5 





21.4+1.2 



19.6-23.2 



(18) 



10.9±0.5 



10.2-12.0 



(21) 



Table 2 Number of vertebrae of species of Sundasalanx; counts for S. 

 praecox and S. ink raps are from Roberts ( 198 1 ). Analysis of variance 

 with apost hoc test of location reveals S. praecox to be significantly 

 different from 5. microps, S. platyrhynchus. S. malleti, and S. mesops at 

 p< 0.001. 



Vertebrae 



37 38 39 40 



42 



43 



44 



,S'. praecox 



S. microps 



S. platyrhynchus 



S. malleti 



S. mesops 



S. megalops 



Table 3 Dorsal- and anal-fin branched ray counts for species of 



Sundasalanx. Sundasalanx praecox. S. microps. S. platyrhynchus. S. 

 malleti, and 5. mesops were tested for difference in number of dorsal- 

 and anal-fin branched rays with one-way analysis of variance, with 

 Tukey's post hoc HSD test to locate differences of means. Sundasalanx 

 platyrhynchus differs from S. mesops in number of branched dorsal-fin 

 rays at p < 0.01 ; for branched anal-fin rays S. microps and S. 

 platyrhynchus test as significantly different from S. praecox. S. malleti, 

 and 5. mesops with /; < 0.0 1 . 







D-fin ray 



s 





A-fin 



rays 









8 



9 



10 



II 12 



13 



14 



15 



16 



17 



5. praecox 





4 



1 





1 



2 



2 







S. microps 





2 



5 









2 



3 



2 



S. platyrhynchus 





3 



15 



4 1 





4 



3 



12 



4 



S. malleti 



4 



16 



23 



3 



9 



16 



13 



5 



1 



S. mesops 



2 



28 



8 





3 



23 



9 



2 





S. megalops 







2 







1 



1 







Fig. 11 



SL. 



Holotype of Sundasalanx malleti, female. MZB 6096. 26.4 mm 



Sungai Murung around Project Barito Ulu basecamp on Sungai 

 Murung, seine, 12 Feb 1991, D. Siebert, O Crimmen, and A. 

 Tjakrawidjaja. 



DIAGNOSIS. A photograph of S. malleti is presented as Fig. 11; 

 selected morphometries are summarised inTable 1 and vertebral and 

 fin-ray counts are summarised in Table 2 and Table 3. It is a species 

 of Sundasalanx with a relatively small eye (3.8^1.7% SL, 19.7- 

 23.2% HL); snout long (18.4-23.9% HL); and with snout:eye ratio 

 usually greater than 1 (0.8-1.2). Prepectoral blotch extensive; ma- 

 turing or mature males (large individuals) with basipterygium ringed 

 by melanophores; no melanophores on posterior wall of cardiac 

 compartment; lower caudal-fin lobe with a broad swath of 

 melanophores. Vertebral number 40-44 (median=42); dorsal-fin 

 rays 8-11 (median= 10); anal-fin rays 13-17 (median= 14). Premax- 

 illa with 4-5 teeth, maxilla with 15-17 teeth; dentary with 10-12 

 teeth: 5th ceratobranchial tooth plate large, with 5-6 teeth in princi- 

 pal posterior row, 2 or 3 rows of smaller teeth anterior to principal 

 row; 3rd pharyngobranchial tooth plate large, longer than wide, 

 subequal to or larger than 4th pharyngobranchial tooth plate; 4th 

 pharyngobranchial tooth plate large, nearly 1/2 size of 4th pharyngo- 

 branchial, with principal row of larger teeth along posterior edge. 

 Sundasalanx malleti is easily distinguished from its Barito River 



1.8 



1.3 - 



CD 

 >. 

 <D 



1.0 - 



0.7 





I 





1 



1 











O y 



So/ 



9 °&* 



x yr 





' 







' OO y 



X 



— 





j6 o 



X- 



1 



1 





10 



15 



20 



SL 



25 



30 



Fig. 12 Scatter plot of Eye versus Standard length for Barito River 

 species of Sundasalanx, with linear smoothing function superimposed 

 on points for S. malleti and 5. mesops; A = 5. megalops, O = S. mesops, 

 x = S. malleti. 



