Morphology Data of Notoglanidium walkeri
Identification keys
Main Ref. Geerinckx, T., E. Vreven, M. Dierick, L.V. Hoorebeke and D. Adriaens, 2013
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

Diagnosis: Notoglanidium walkeri differs from other species in the genus in having: an average interorbital distance, 27.8-33.3% of head length vs. smaller in N. boutchangai, N. depierrei, N. pallidum and N. pembetadi, and larger in N. maculatum and N. thomasi; a relatively small combined premaxillary tooth plate width, 13.7-16.1% of head length vs. larger in N. akiri, N. boutchangai, N. macrostoma and N. pembetadi; and a relatively large number of soft dorsal-fin rays, 11-15 vs. less in N. akiri, N. boutchangai, N. depierrei and N. macrostoma, and more in N. maculatum (Ref. 94168).

Description: A small, elongate species, about 6 times as long as deep; snout nor body much depressed, predorsal body depth 14.1-20.2% of standard length, minimal caudal peduncle depth 13.0-14.6% of standard length, head depth 53.6-66.0% of head length (Ref. 57126, 94168). Occipital process scarcely developed and distinctly seprated from nuchal plates; humeral spine well visible (Ref. 57126). Eyes very small, round and in dorsal position (Ref. 57126). Branchiostegal membranes completely fused (Ref. 94168). Dorsal fin with short spine, 3.2-7.0% of standard length (Ref. 94168).

Colouration: In life, yellowish brown, with round dark spots scattered around body and fins (Ref. 94168). Preserved specimens are more or less yellowish, with black spots irregularly scattered on body and fins (Ref. 57126).

Ease of Identification

Meristic characteristics of Notoglanidium walkeri

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 9 - 10
total 39 - 40


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  0
Spines total
Soft-rays total 11 - 15
Adipose fin present

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 11 - 12

Paired fins

Pectoral Attributes  more or less normal
Spines     1
Soft-rays   6 - 7
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     0
Soft-rays   6 - 6
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Musschoot, Tobias
Modified by Boden, Gert
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