Dodatak:Popis polusvitkovaca, A
Acanthograptus Spencer, 1878 uredi
- Acanthograptus divergens Skevington, 1963
- Acanthograptus impar Bulman et Rickards, 1967
- Acanthograptus musciformis (Wiman, 1901)
- Acanthograptus roomusoksi Obut et Rytzk, 1958
- Acanthograptus suecicus (Wiman, 1895)
Hemichordata → Pterobranchia → Graptolithina → Dendroidea → Acanthograptidae , Atubaria , Atubaridae