Notacanthella jinwu Li & Jacobus sp. nov. A abdomen, nymph, dorsal view B abdominal segments I–III of last nymphal instar C abdominal segments VII–X of last nymphal instar D tubercle of abdominal tergum VII of last nymphal instar E lateral margins of abdominal segment VII of last nymphal instar F gill III G gill IV H gill V I gill VI J gill VII.