Morphology Data of Phractura ansorgii
Identification keys
Main Ref. Skelton, P.H., L.M. Risch and D. Paugy, 2003
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 elongated
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth sub-terminal/inferior
Type of scales

Diagnosis: pectoral-fin tips reaching to pelvic-fin bases; pelvic-fin insertions located on a vertical line from last dorsal-fin ray: snout length less than 55% of head length; posterior nostrils large, separated from orbits by a bony crest; humeral process blunt; branchiostegal membrane broadly notched ventrally; width of occipital process comprised 3.2 times in its length (Ref. 57128).

Description: body elongate, narrower towards caudal fin; head triangular, snout pointed, with a median, posteriorly bifurcate, bony crest; eyes rather large, with a supraorbital swelling and a bony crest above and below cheeks; mouth subterminal, barbels simple, short and thin; supraoccipital process moderately long and bluntly pointed, separated by a short distance from dorsal-fin base; humeral process well developed, oblong and blunt; an additional bony process present between the humeral and supraoccipital ones; dorsal fin triangular, positioned ahead of pelvic fins, its anterior ray minute and spinous; pectoral and pelvic fins falcate, their principal ray broad and filamentous; pectoral-fin tips reaching to pelvic-fin bases, and pelvic-fin tips to anal-fin base; anal fin with 2 spines and 9 branched rays; adipose fin small, placed above posterior part of anal fin and preceded by a short spine located at the end of a mid-dorsal bony crest; caudal peduncle long and slender, encased by bony plates; caudal fin small and triangular, with a semilunar posterior margin; a series of 25 bony plates on either side of back, from dorsal fin to caudal peduncle; a second series of 21 bony plates on either side of belly, between pelvic fins and caudal peduncle; 7+8 principal caudal fin rays (Ref. 57128).

Coloration: pale brown with black spots, belly white; 2 small black spots on dorsal fin and 3 blackish lines on caudal fin (Ref. 57128).

Ease of Identification

Meristic characteristics of Phractura ansorgii

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
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   0
Ventral  0
Spines total 1
Soft-rays total 6
Adipose fin present

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 2
Soft-rays total 9

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   10
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     0
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Musschoot, Tobias
Modified by Musschoot, Tobias
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17