Morphology Data of Acipenser medirostris
Identification keys
Abnormalities
Main Ref. Morrow, J.E., 1980
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs other
Different appearance different morphology in juveniles and adults
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral elongated
Cross section
Dorsal head profile clearly concave
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth sub-terminal/inferior
Type of scales ganoid scales
Diagnosis

Characterized by a single row of 1 to 4 bony plates along the midventral line between the anus and the anal fin, and about 33 to 35 rays in the dorsal fin. Dorsal arises at posterior third of the total length; anal fin arises under posterior part of dorsal; pectorals originate low on the body just behind gill opening and are large and rounded; pelvic fins arise near the anus. Generally olive to dark green, lower parts more or less whitish green; a longitudinal olive-green stripe on side between lateral and ventrolateral plates, another on midventral surface; fins grayish to pale green (Ref. 27547). Barbels usually situated closer to mouth than to snout tip; coloration of scutes along side paler than skin (Ref. 86798).

Ease of Identification

Meristic characteristics of Acipenser medirostris

Lateral Lines 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 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 0 - 0
Soft-rays total 33 - 35
Adipose fin absent

Caudal fin

Attributes heterocercal; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 22 - 28

Paired fins

Pectoral Attributes  very large , lobe-like
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 )
Entered by Palomares, Maria Lourdes D.
Modified by Bailly, Nicolas
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