Morphology Data of Doumea gracila
Identification keys
Abnormalities
Main Ref. Skelton, P.H., 2007
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
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth sub-terminal/inferior
Type of scales
Diagnosis

Diagnosis: caudal peduncle 2.9-3.2 times in SL, very slender, length 12.4-16.9 times depth (Ref. 81646).

Description: body firm, slender, depressed anteriorly, strongly tapered to caudal base; bony ridge behind dorsal fin to adipose fin, thin mid-dorsal, mid-ventral and bi-latero-ventral bony ridges along caudal peduncle; head slender and pointed, 5.4-6.2 times in SL, flat below, smooth and rounded above; snout long, 66% HL; nostrils in mid-snout, slightly nearer to eyes than to anterior tip; mouth small, oval-shaped, subterminal lips above fleshy, papillose, lower lips divided by firm triangular pad; barbels short, thick and papillose, maxillaries longest not reaching below orbits; eyes small, on posterior third of head, widely separated (interorbital width 1.7-2.4 times orbit diameter), orbits bony above; supraoccipital process slender, about half length of snout, nearly reaching nuchal shield; humeral process short, obscured; branchiostegal membrane united, straight or slightly concave edge, covered with radiating unculi; predorsal length 1/3 of SL; caudal peduncle long (length 2.9-3.6 times in SL), slender (length 9.3-16.9 times depth), depressed; fins large, pointed and falcate; origin of dorsal less than head length behind head; dorsal fin pointed, leading ray slender and stiff, hind edge straight to shallow concave in larger adults; pectorals large, falcate, not reaching base of pelvics, leading ray curved, pectinate, padded, outer rays lie horizontal, inner rays inclined dorsally; pelvics falcate, reaching beyond origin of anal fin base, leading ray curved, pectinate and padded; anal fin with straight hind edge, not reaching base of caudal; caudal with compact base, deeply forked with pointed lobes, ventral lobe longer; adipose short, triangular, over posterior anal base; ano-genital openings placed about mid-way between pelvic and anal fin base; males with short conical genital papilla (Ref. 81646).

Coloration: countershaded, dark grey to black or brown above, light creamy brown below from snout to anal fin, some sooty pigment to caudal; boundary between dorsal and ventral sections sharply demarcated along body below lateral line, dark patches above pelvic bases, 3-6 light patches or saddles on dorsal surface from behind head to caudal, head above dark grey, black or brown with light brown patches over gill covers and behind eyes; dark pre-orbital stripes sometimes evident; fins with grey-black rays, paired fins grey-black above with light medial section, outer rays of caudal dark grey-black (Ref. 81646).

Ease of Identification

Meristic characteristics of Doumea gracila

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 6
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

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

Caudal fin

Attributes forked

Anal fin(s)

Fins number 1
Spines total 0
Soft-rays total

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   
Pelvics Attributes  
Position    abdominal
Spines     0
Soft-rays   
Back to Search
Comments & Corrections
cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17