Fig. 1
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Fig. 2
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Fig. 3
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Fig. 4
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Fig. 5
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1A. PAPILLATE LIPS (FIG. 1A)....................2
1B. PLICATE LIPS (FIG. 1B)....................4
2A. MAXILLARY BARBELS LARGE AND VISIBLE (FIG. 2C), 30-35
SCALES IN LATERAL LINE, 12-15 CIRCUMPEDUNCULAR
SCALES ....................LABEO MALEBOENSIS
2B. MAXILLARY BARBELS SMALL AND HIDDEN (FIG. 2D), 35-38
SCALES IN LATERAL LINE, 15-18 CIRCUMPEDUNCULAR SCALES
....................3
3A. 11-12 BRANCHED DORSAL FIN RAYS, NO DARK SPOT AT BASE OF CAUDAL PEDUNCLE
....................LABEO WEEKSII
3B. 9-10 BRANCHED DORSAL FIN RAYS, DARK SPOT AT BASE
OF CAUDAL PEDUNCLE (FIG. 3B)
....................LABEO LINEATUS
4A. POSTERIOR MARGIN OF DORSAL FIN STRAIGHT (FIG. 2A), OR CONVEX (FIG. 3B)
....................5
4B. POSTERIOR MARGIN OF DORSAL FIN VARIOUSLY
CONCAVE (FIG. 3C,D) ....................7
5A. ANAL FIN EXTENDS WELL BEYOND ORIGIN OF CAUDAL
FIN (FIG. 3A), BODY DARK WITH NO LATERAL STRIPING
....................LABEO LONGIPINNIS
5B. ANAL FIN NOT EXTENDING FAR BEYOND BASE OF CAUDAL FIN, FLANKS STRIPED
....................6
6A. CAUDAL PEDUNCLE DEEPER THAN LONG, DORSAL FIN
SAIL-LIKE, POSTERIOR MARGIN CONVEX (FIG. 3B)
LABEO DEGENI
6B. CAUDAL PEDUNCLE AS DEEP AS LONG, DORSAL FIN NOT SAIL-LIKE, POSTERIOR MARGIN STRAIGHT (FIG. 3A)
....................LABEO RECTIPINNIS
7A. DOMINANT COLORATION CONSISTS OF A SINGLE DARK BAND EXTENDING FROM OPERCLE TO CAUDAL FIN BASE OR A SINGLE BLACK SPOT AT BASE OF CAUDAL FIN (FIG.
3B,D)....................8
7B. NO CLEARLY DEFINED LATERAL BAND ON BODY, DARK SPOT AT CAUDAL FIN BASE NOT DOMINANT....................11
8A. SINGLE DARK BAND EXTENDING FROM OPERCLE TO CAUDAL FIN BASE, DARK CAUDAL SPOT SOMETIMES VISIBLE....................9
8B. NO DARK LATERAL BAND, CLEARLY DEFINED LARGE BLACK CAUDAL SPOT DOMINANT COLORATION....................10
9A. 33-36 SCALES IN LATERAL LINE, SNOUT WITH NARROW TRANSVERSE FURROW ON SNOUT (FIG. 2A)
....................LABEO PARVUS
9B. 37-39 SCALES IN LATERAL LINE, SNOUT WITH BROAD TRANSVERSE FURROW (FIG. 2B)....................LABEO ANNECTENS
10A. EACH FLANK SCALE WITH MIDFIELD SPOT ALIGNED IN
LONGITUDINAL STRIPES, BLACK SPOT AT CAUDAL FIN
BASE NOT EXTENDING ONTO SCALED CAUDAL FIN (FIG.
3B), SNOUT WITHOUT TRANSVERSE FURROW (FIG. 2D)
....................LABEO FULAKARIENSIS
10B. FLANKS SCALES WITHOUT MIDFIELD SPOTS, CAUDAL SPOT EXTENDING ONTO SCALED CAUDAL FIN (FIG. 2D), SNOUT WITH DEEP TRANSVERSE FURROW (FIG. 2B),
DORSAL FIN DEEPLY CONCAVE, SOMETIMES FALCATE
....................LABEO GREENI*
11A. POSTERIOR MARGIN OF DORSAL FIN MODERATELY CONCAVE....................12
11B. POSTERIOR MARGIN OF DORSAL FIN FALCATE (FIG. 3D) OR VERY DEEPLY CONCAVE ....................17
12A. MAXILLARY BARBELS LARGE AND EXTERNALLY VISIBLE
AT CORNERS OF MOUTH (FIG. 2C)....................13
12B. MAXILLARY BARBELS MINUTE AND HIDDEN OR BARELY
VISIBLE (FIG. 2D)....................15
13A. ROSTRAL BARBELS MINUTE OR ABSENT (FIG. 2D), USUALLY 12 BRANCHED DORSAL FIN RAYS, 36-38 SCALES IN LATERAL LINE....................
LABEO CYCLORHYNCHUS
13B. ROSTRAL BARBELS LARGE AND PROMINENT (FIG. 2C), ELEVEN OR FEWER BRANCHED DORSAL FIN RAYS....................14
14A. ROSTRAL AND MAXILLARY BARBELS UNIFORMLY DARK BLACK OR BLACKISH GREY....................LABEO BARBATUS
14B. ROSTRAL AND MAXILLARY BARBELS PALE GREYISH AT
TIPS, DARKER AT BASE....................LABEO LIVIDUS**
15A. SNOUT SMOOTH WITH NO TRANSVERSE FURROW (FIG. 2C), EYES LARGE, MOUTH VERY LARGE WITH BROAD ISTHMUS (FIG. 4A)....................LABEO MACROSTOMA
15B. SNOUT WITH TRANSVERSE FURROW (FIG. 2A,B),EYES SMALLER IN DORSO-LATERAL POSITION, MOUTH WITH NARROW ISTHMUS (FIG. 4B)....................16
16A. SCALES RELATIVELY LARGE, 6.5-7.5 SCALE ROWS BETWEEN LATERAL LINE AND DORSAL FIN ORIGIN, 8-10 PREDORSAL SCALES OF UNIFORM SIZE (FIG. 5A), 36-38
(MODE 38) LATERAL LINE SCALES, EYES SMALL AND DORSO-LATERAL (FIG. 5A) ....................LABEO NASUS
16B. SCALES SMALL, MORE THAN 8 SCALE ROWS BETWEEN LATERAL LINE AND DORSAL FIN ORIGIN, NUMEROUS SMALL, IRREGULAR PREDORSAL SCALES (FIG. 5B), 40-43 LATERAL LINE SCALES, EYES VERY SMALL AND DORSO-LATERAL (FIG. 5B) ....................LABEO SOREX
17A. POSTERIOR MARGIN OF DORSAL FIN FALCATE (FIG. 3D), 33-36 SCALES IN LATERAL LINE, 3.5-5.5 SCALES BETWEEN LATERAL LINE AND DORSAL FIN ORIGIN, 12-16 CIRCUMPEDUNCULAR SCALES....................LABEO CHARIENSIS
17B. POSTERIOR MARGIN OF DORSAL FIN FALCATE (FIG. 3D), 37-38 SCALES IN LATERAL LINE, 6.5-8.5 SCALES BETWEEN LATERAL LINE AND DORSAL FIN ORIGIN, 18-21
CIRCUMPEDUNCULAR SCALES
....................LABEO FALCIPINNIS
*THE POSSIBILITY THAT LOWER CONGO RECORDS OF LABEO GREENII ARE MISIDENTIFICATIONS OF THE RECENTLY DESCRIBED LABEO FULAKARIENSIS IS CURRENTLY UNDER INVESTIGATION.
** LABEO LIVIDUS IS A SYNONYM OF LABEO BARBATUS ACCORDING TO REID (1985), TSHIBWABWA AND TEUGELS (1995), AND TSHIBWABWA (1997). THE STATUS OF LABEO LIVIDUS IS CURRENTLY UNDER INVESTIGA
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