Morphology Data of Tylochromis bangwelensis
Identification keys
Abnormalities
Main Ref. Stiassny, M.L.J., 1989
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance always different morphology between mature adults
Different colors always different colors between mature adults
Remarks Sexual dimorphism of buccal dentition is well-marked although it is not clearly evident until specimens are at least 140mm SL; in males of minimum 150mm SL, all teeth are coarser and fewer in number than is the case in females of equivalent sizes, but the pattern of implantation of teeth in the lower jaw is the same in both sexes (Ref. 52346).

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Diagnosis: lower lateral line extending far forward (Ref. 52962).

Description: deep-bodied with a strongly curved back (Ref. 52307). Dorsum strongly recurved from nape to caudal peduncle but ventrum flattened; deepest body depth along back is at or little behind origin of dorsal fin; predorsal profile more or less straight and steep (Ref. 52346). 3 series of scales on cheek (Ref. 52971). Mouth might be slightly inclined in larger individuals; lips well-developed but not markedly thickened or fleshy (Ref. 52346). Maxillary not extending to below eye (Ref. 52971). Pharyngeal apophysis of the Tylochromis type (Ref. 53524). Entire premaxillary oral valve present; interorbital region with unfrequently developed fleshy bulge; most specimens with "straight-snouted" appearance; inferior vertebral apophysis of the standard Tylochromis type; upper branch of lateral line terminates a little in advance of the end of the dorsal fin; 2 series of scales between upper lateral line and anterior part of lower (Ref. 52346). 24-29 scales in lower lateral line (Ref. 52971). Dorsal and ventral branches of lateral line on caudal fin often difficult to distinguish but invariably present and extend about 2/3 of the way onto the fin; median branch frequently missing but when present rarely extends more than halfway along the fin; dorsal fin spines increase in length to 4th-5th and are then more or less equal in length; anal fin rounded; caudal fin strongly emarginate and only finely scaled in dorsal and ventral fields; pectoral fins usually reach origin of soft anal fin but rarely extend beyond that; first branched ray of pelvic fins produced and filamentous and frequently reaches soft anal fin (Ref. 52346).

Coloration: pale greenish-yellowish (Ref. 52307). Approximately 6 blackish transversal bands, scales often blackish at center (Ref. 2970). Head, front of body, pelvic fins and lower lobe of caudal fin often with red; dorsal fin smokey brown with numerous rows of pale spots; anal fin smokey grey (Ref. 52346). Males: darker than females; tend to have lost all traces of vertical striping; yellowish in color with white lips; anal fin with 2-3 rows of pale spots; caudal fin with pattern of dark spotting and striping characteristic of Tylochromis males (Ref. 52346). Mature females: tend to be darker than juveniles; red patch on opercular bones; dark nape band well-marked and distinct; mostly with retention of traces of vertical striping; preserved fish frequently silvery (Ref. 52346). Juveniles: typically dusky grey over snout and interorbital region; faint opercular blotch usually contacts nape stripe and 6 vertical bars extend well below midline onto flanks; in small specimens short bars alternate with main vertical stripes in typical "juvenile barring" pattern; dorsal fin smokey brown and spotted with rows of whitish spots (Ref. 52346).

Ease of Identification

Meristic characteristics of Tylochromis bangwelensis

Lateral Lines 2 Interrupted: No
Scales on lateral line 34 - 38
Pored lateral line scales
Scales in lateral series 24 - 30
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle 16
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 13 - 16
on upper limb 8 - 9
total
Vertebrae
preanal
total 28

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   0
Ventral  0
Spines total 13 - 15
Soft-rays total 14 - 16
Adipose fin absent

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number 1
Spines total 3
Soft-rays total 7 - 8

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   
Pelvics Attributes  
Position    
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Musschoot, Tobias
Modified by Musschoot, Tobias
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