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  • cover of eye not continuous with head skin
    D origin over (female)/behind (male) A origin
    front nostril not tubular
    pectoral high on side
    pelvic under pectoral rays
    male: A modified to -> long sex organ
    A 3rd ray unbranched
  • very elongate
    eye divided horizontally, raised on top of head
    D well behind A
    pelvics behind pectoral tip
    with male sex organ
  • cover of eye continuous with head skin
    sensory system above eyes: grooves + plates, no pores
    D origin over last A rays
    front fin rays may be unbranched
    front nostril tubular
    teeth cónical
    pectoral ~mid-side
    pelvics near A
  • stout body
    D origin well before A origin
    front nostril not tubular
    teeth compressed, 3-pointed
    pectoral low on side
    pelvic origin under pectoral rays
    A all rays branched
  • cover of eye not continuous with head skin
    D origin over ~ A origin
    front nostril not tubular
    teeth cónical
    pectoral low
    pelvic origin under pectoral rays
    A 3rd ray branched