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disc flat, angular/round, width < 1.3 X lengthno Dstail slender, >> disc; no Cnasal curtain rear edge - fringed
floor mouth - papillae -
head distinct, lobe under snout not notched1 Dtail > disc; no Cteeth in 6-10 rows
flap between nostrils: no V notch -
Disc round/oval
top disc: many small denticles
head not elevatedmouth: papillae on floor, many tooth rows -
rhomboidal disc2 small Ds, near end narrow tailC = small skin fold after D2pelvic 2 lobes
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disc rhomboid, width > length1 Dtail > disc; no Chead large square, notch & flaps under front