Morphology Data of Salmo macrostigma
Identification keys
Main Ref. Delling, B. and I. Doadrio, 2005
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral fusiform / normal
Cross section oval
Dorsal head profile clearly convex
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth
Type of scales

Diagnosis: dorsal fin slightly higher than long; located more posteriorly than in other Salmo species; caudal fin more forked than other Salmo species; 8-12 round, black spots (parr marks) on sides (Ref. 4904, 52923, 94703, 94704), which are more prominent in juveniles and are retained in adults (Ref. 55619). Low gill raker count and dark spots on sides distinguish it from S. akairos; it differs from S. trutta in slightly lower vertebral count and pyloric caeca counts, and having the parr marks more conspicuous; 10-11 anal fin pterygiophores (Ref. 55619). 14-17 small scales between adipose fin and lateral line (Ref. 1878, 52923, 55619).

Description: eye diameter 3.5-4.5x in HL and 1.0 to 1.25x in interorbital space (Ref. 52923). Double row of vomerine teeth (Ref. 52923, 94703, 94704) in a zigzag pattern (Ref. 1878, 3021, 52923). Well-developed jaw and palatine teeth; maxillary extends to below posterior third of eye or a little beyond posterior margin of eye (Ref. 52923). Head length 4.0-4.5x in TL (Ref. 94703, 94704) or 3.2-4.25x in SL (Ref. 52923). Body depth 3.3-4.3x in SL (Ref. 52923). 13-14 caudal fin upper procurrent rays; 10-12 left side brachiostegals; 13-14 dorsal fin pterygiophores (Ref. 55619). Scale formula 22-27/95-128/28-32 (Ref. 52923). Caudal fin deeply emarginate in young, feebly in adults (Ref. 52923).

Colouration: back is olive-brown, shading to golden-yellow or yellowish-white beneath (Ref. 1878, 4904, 52923). Small black (red in life) spots on both sides of body (35-40 on each side) similar to other Salmo species (Ref. 94703, 94704). These spots sometimes encircled with whitish or bluish coloured rings (Ref. 1878, 4904, 52923). One clear, black spot on operculum (Ref. 1878, 52923, 94703, 94704). Dorsal fin with black anterior margin and small black spots; anterior margin of anal fin is black. Other fins uniformly pale (Ref. 94703, 94704). Round, black spots along the lateral line (Ref. 1878, 52923, 94703, 94704). These fade with age and are parr marks (Ref. 4904).

Ease of Identification

Meristic characteristics of Salmo macrostigma

Lateral Lines Interrupted: No
Scales on lateral line 95 - 128
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 22 - 27
Scale rows below lateral line 28 - 32
Scales around caudal peduncle
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 10 - 12
on upper limb
total 57 - 58


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Spines total
Soft-rays total 13 - 15
Adipose fin present

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total
Soft-rays total 11 - 13

Paired fins

Pectoral Attributes  more or less normal
Soft-rays   13 - 14
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Soft-rays   8 - 9
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Geelhand, Dimitri
Modified by Geelhand, Dimitri
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