Morphology Data of Exostoma sawmteai
Identification keys
Main Ref. Lalramliana, S. Lalronunga, Lalnuntluanga and H.H. Ng, 2015
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral elongated
Cross section oval
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth sub-terminal/inferior
Type of scales

Exostoma sawmteai differs markedly from the other species of the genus from Ganges-Brahmaputra basin in having the posterior end of the adipose fin adnate with (vs. separated by a distinct notch from) the dorsal procurrent caudal-fin rays; further differs from all congeners in having a unique combination of the following characters: snout length 48-55 % HL; eye diameter 8-11 % HL; pectoral-pelvic distance 28.6-32.8 % SL; body depth at anus 11.5-14.1 % SL; length of adipose-fin base 30.7-37.2 % SL; caudal-peduncle length 18.4-20.3 % SL; caudal-peduncle depth 10 .1-11. 7 % SL; lunate caudal fin; and 38-39 total vertebrae (Ref. 103394).

Ease of Identification

Meristic characteristics of Exostoma sawmteai

Lateral Lines 1 Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels 4
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 38 - 39


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Spines total
Soft-rays total 7
Adipose fin present

Caudal fin

Attributes other (see remark); more or less normal

Anal fin(s)

Fins number 1
Spines total
Soft-rays total 7

Paired fins

Pectoral Attributes  more or less normal
Soft-rays   10 - 11
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Soft-rays   6
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Hennyey, Andrea
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17