-
both Ds - grooved spine
D1 =/> D2D1 origin over/behind pectoral baseC v asymmetrical, notch under top lobe, base no keeltop & bottom teeth dissimilar, top << bottomno A -
head narrow, conical
large spiraclesDs small, rounded, usually no spine, D1 < / = D2top teeth - narrow needles, bottom - broad bladesno A -
both Ds - grooved spine; D1 < D2D1 origin behind pectoral free rear tipC: asymmetric, top lobe notched; tail base no keeltop teeth: 1 large + small side pointsno Abelly - usually light organs
-
eye oval, behind mouth2 large DsC notched above, v weak lower lobe2 barbels under snout
mouth small, transverse, opens near front5 short gill slits -
snout cónical, bulbous
eye smallheavy body, broad fins
A ~ size of DsC asymmetric, strong lower lobeteeth slender, curved5 gill slits -
body high, triangular cross-section2 high, pointed, curved Ds with a spinemouth small, transverse, under eyeno A