Morphology Data of Pristis microdon
Identification keys
Abnormalities
Main Ref. Compagno, L.J.V., D.A. Ebert and M.J. Smale, 1989
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 elongated
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout other (see Diagnosis)
Position of mouth sub-terminal/inferior
Type of scales placoid scales
Diagnosis

Diagnosis: A heavily-bodied sawfish with a short but massive saw which is broad-based, strongly tapering and with 14-22 very large teeth on each side; space between last 2 saw-teeth on sides less than 2 times space between first 2 teeth (Ref. 5578). Pectoral fins high and angular, 1st dorsal fin mostly in front of pelvic fins, and caudal fin with pronounced lower lobe (Ref. 5578).

Description: Body shark-like; head and forebody depressed; caudal region compressed (Ref. 52193). Saw relatively short and broad, length 5 times width of base in mature specimens, 17-22 widely spaced teeth on either side (Ref. 52193). Mouth ventral, straight, numerous small teeth in bands; gill slits underneath, behind origin of pectoral fins (Ref. 52193). Pectoral fins large, triangular, extending onto the sides of the head; 2 dorsal fins, origin of first dorsal fin well in front of origin of pelvic fins; anal fin absent; caudal fin with distinct lower lobe (Ref. 52193).

Colouration: Greenish, grey, olive or golden-brown above, dirty cream below (Ref. 5578, 52193).

Ease of Identification

Meristic characteristics of Pristis microdon

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
Gill clefts (sharks/rays only) 5
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number 2
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 0 - 0
Soft-rays total
Adipose fin absent

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number
Spines total 0 - 0
Soft-rays total 0 - 0

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     0
Soft-rays   
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