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. CAUDAL FIN DISTINCT, NOT FULLY CONTINUOUS WITH DORSAL AND ANAL FINS (FIG. 1A,D) ....................2
1B. CAUDAL FIN INDISTINGUISHABLE FROM AND CONTINUOUS WITH DORSAL AND ANAL FIN (FIG. 2A-D)....................3
2A. LARGE GAP BETWEEN SUPRAOPERCLE AND 4TH INFRAORBITAL BONES (FIG. 1C) AND CHEEK MUSCLES EXPOSED AND OFTEN BULGING LATERO-DORSALLY (FIG. 1D) ....................CLARIALLABES
2B. SUPRAOPERCLE AND 4TH INFRAORBITAL BONE IN CONTACT (FIG. 1B) FORMING A BONY ROOF OVER CHEEK MUSCLES DORSO-LATERALLY (FIG. 1A)....................CLARIAS
3A. WELL DEVELOPED SKIN FOLDS AROUND MOUTH, CLEARLY VISIBLE WHEN VIEWED FROM ABOVE (FIG. 3B), 4TH INFRAORBITAL BONE SMALL AND TUBULAR (FIG. 4B-D)....................4
3B. SKIN AROUND MOUTH NOT MARKEDLY WELL DEVELOPED AND NOT VISIBLE FROM ABOVE (FIG. 3A), 4TH INFRAORBITAL BONE LARGE, WITH PLATE-LIKE FORM (FIG. 4A)....................CHANNALLABES
4A. CHEEK MUSCLES ENLARGED AND BULBOUS OVER SKULL ROOF, DEEP GROOVE MEDIALLY ON SKULL ROOF (FIG. 4A), ELONGATE FONTANEL ON SKULL ROOF (FIG. 5B)....................DOLICHALLABES
4B. DORSAL SURFACE OF HEAD FLAT (FIG. 4B)....................5
5A. INFRAORBITAL BONES REDUCED (FIG. 5D), EYES ABSENT, BODY DEPIGMENTED AND PINK, ANTERIOR CRANIAL FONTANEL BROAD AND SHORT (FIG. 5D)....................GYMNALLABES
5B. ALL INFRAORBITAL ELEMENTS PRESENT (FIG. 5C), EYES USUALLY PRESENT (OFTEN COVERED IN SKIN AND VERY SMALL), BODY VARIOUSLY PIGMENTED (RARELY COMPLETELY DEPIGMENTED), ANTERIOR CRANIAL FONTANEL NARROW AND RELATIVELY ELONGATE (FIG. 5C)....................PLATYALLABES
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