Main Ref. | Schmitter-Soto, J.J., 2017 |
Appearance refers to | |
Bones in OsteoBase |
Specialized organs | |
Different appearance | |
Different colors | |
Remarks |
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 |
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 |
Attributes | no striking attributes |
Fins number | 1 |
Finlets No. | Dorsal |
Ventral | |
Spines total | |
Soft-rays total | 10 - 10 |
Adipose fin |
Attributes | forked |
Fins number | |
Spines total | |
Soft-rays total | 21 - 24 |
Pectoral | Attributes more or less normal |
Spines | |
Soft-rays | |
Pelvics | Attributes more or less normal |
Position abdominal before origin of D1 | |
Spines | |
Soft-rays |