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  • disc angular
    snout angular, not projecting
    top back thorns- 1 long center row + 2 short side
    tail: sides - no tubercles, height of ventral fold ~tail depth
  • disc angular
    snout angular, not projecting
    back thorns - center row + sides
    tail: sides - thorns & tubercles, fold underneath ~1/2 tail depth
  • disc angular
    snout projecting, sides concave
    center back - broad band of small tubercles + row
  • disc edges round
    snout pointed, length > length between spiracles
    1/3 of pelvics project past disc
  • disc edges rounded
    snout blunt, length < distance between spiracles
    < 1/3 of pelvics projecting beyond disc