Morphology Data of Danionella dracula
Identification keys
Main Ref. Britz, R., K.W. Conway and L. RĂ¼ber, 2009
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
Type of scales scales embedded or partly/completely absent

Differs from its congeners, Danionella translucida and Danionella mirifica, in having the following characters: a single bone in the upper jaw (versus two); a single row of 6-13 odontoid processes in males on the dorsal surface of the dentary and on the ventral surface of the upper jaw, the anteriormost processes of which are large and canine-like

(versus absence of processes); absence of maxillary-mandibular cartilage (versus presence); the possession of 7C8, 8C7 or 8C8 principal caudal fin rays (versus 9C9), dorsal procurrent rays 3-4 (versus 5-6) and ventral procurrent rays 2-3 (versus 4-6) (Ref. 81221).

Description: dorsal-fin rays ii, 4-5, i? anal-fin rays ii, 9-11, i? pectoral-fin rays i, 4, ii; and pelvic-fin rays i, 3, ii in females and i, 4, i in males (Ref. 81221).

Ease of Identification

Meristic characteristics of Danionella dracula

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
preanal 15 - 16
total 36 - 37


Dorsal fin(s)

Fins number 1
Finlets No. Dorsal   
Spines total
Soft-rays total
Adipose fin absent

Caudal fin

Attributes forked

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  
Soft-rays   7 - 7
Pelvics Attributes  
Position    abdominal  before origin of D1
Soft-rays   6 - 6
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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