Morphology Data of Maylandia chrysomallos
Identification keys
Abnormalities
Main Ref. Stauffer, J.R. Jr., N.J. Bowers, K.A. Kellogg and K.R. McKaye, 1997
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 fusiform / normal
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Diagnosis: The Moderately sloped head, swollen rostral tip of the neurocranium, isognathous jaws, and the presence of bicuspid teeth in the outer rows of the jaws place this species in Maylandia; the continuation of the vertical bars on the side of fish into the dorsal fin separates this species from M. zebra; the gold highlights on the light blue ground colouration distinguishes this species from M. melabranchion (Ref. 27596).

Description: Jaws isognathous; teeth on jaws in 2-3 rows; majority of teeth in outer rows bicuspid, with a few posterior unicuspid teeth; those in inner rows tricuspid; 6-13 teeth in outer row of left lower jaw (Ref. 27596). Dorsal fin with 17-18 spines; dorsal-fin rays 8-10; pectoral fin with 13 rays; anal fin with 3 spines and 6-8 rays (Ref. 27596). Scales along side ctenoid; 31-33 lateral scales (Ref. 27596). First gill arch with 11-14 rakers on ceratobranchial, 2-3 on epibranchial, and 1 between the epibranchial and ceratobranchial (Ref. 27596). Lower pharyngeal bone triangular in outline (Ref. 27596).

Colouration: Lateral body colouration of breeding males from populations of Mumbo Island and from Malawian east coast between Nsinje River and Makanjila Point light blue with gold highlights and 7-9 faint bars below dorsal fin, fading to white ventrally; breast orange fading to white at pelvic fin; dorsal half of head, operculum, and cheek light blue; ventral portions orange/yellow; snout orange; dorsal fin pale blue, posterior membranes orange distally; caudal-fin rays orange with clear membranes; anal-fin rays blue/gray with 2 orange ocelli; distal portion of pelvic fin orange, remaining clear; pectoral fin clear (Ref. 86409). Females brown/gray with light-blue highlights laterally; belly white; head dark brown with blue/green highlights, gray/black opercular spot, and white gular; dorsal fin brown; caudal-fin rays brown and membranes clear; anal-fin rays brown with clear membranes; leading edge of pelvic fin white, rays brown; membranes clear; pelvic fins clear (Ref. 86409). At Gome, lateral body colouration of breeding males light blue, with 7-9 faint bars below dorsal fin; head light blue with gray highlights; interorbital area gray with 1 blue bar; gular white with yellow blotches; dorsal fin gray proximally, fading to white distally; caudal-fin rays clear with blue membranes; anal-fin rays gray with light blue/white membrane and 2 orange ocelli; leading edge of pelvic fin white, rays clear; first 2 membranes gray, remaining clear; pectoral fin clear; females same as in other populations (Ref. 86409).

Ease of Identification

Meristic characteristics of Maylandia chrysomallos

Lateral Lines Interrupted: No
Scales on lateral line 30 - 33
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)
Gill rakers
on lower limb 9 - 14
on upper limb 2 - 4
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 16 - 19
Soft-rays total 8 - 10
Adipose fin absent

Caudal fin

Attributes

Anal fin(s)

Fins number 1
Spines total 3 - 3
Soft-rays total 6 - 9

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   13 - 15
Pelvics Attributes  more or less normal
Position    thoracic  behind origin of D1
Spines     
Soft-rays   5 - 5
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