Morphology Data of Astyanax acatlanensis
Identification keys
Abnormalities
Main Ref. Schmitter-Soto, J.J., 2017
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral fusiform / normal
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Astyanax acatlanensis is distinguished from its congeners in inland central Mexico by the following characters: supracephalic profile, usually concave (vs. usually convex); modally 12 (modally 11-11.5) predorsal scales; modally 15.5 or fewer scales around caudal peduncle (vs. modally 16 or more); 10 or more procurrent unsegmented caudal fin rays on dorsum (9 or fewer

in A. rioverde); head short, mean 23.8% SL (mean 24.6% or higher in A. mexicanus, A. rioverde and A. salvatoris); sides of anterior fontanel, straight (convex, in A. rioverde); ascending vs. descending arms of premaxilla, subequal (vs. dentigerous longer); infraorbital IV, square with projections (rectangular in A. rioverde); and opercle dorsal edge, convex (obtuse in A. rioverde and A. salvatoris) (Ref.118583).

Ease of Identification

Meristic characteristics of Astyanax acatlanensis

Lateral Lines Interrupted: No
Scales on lateral line 32 - 37
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 7 - 8
Scale rows below lateral line
Scales around caudal peduncle 14 - 16
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 10 - 11
on upper limb
total
Vertebrae
preanal
total 32 - 33

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 10 - 10
Adipose fin

Caudal fin

Attributes forked

Anal fin(s)

Fins number
Spines total
Soft-rays total 21 - 24

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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