Liwiidae Temporal range: Cambrian–Ordovician PreꞒ Ꞓ O S D C P T J K Pg N
Tariccoia arrusensis, 21 mm, from Sardegna, Italy
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Order:	†Nektaspida
Family:	†Liwiidae Dzik et Lendzion, 1988
Genera
See text.

Liwiidae is a family of arthropods in the order Nektaspida. Members are known from the Cambrian and Ordovician periods.

• Liwia Dzik and Lendzion, 1988

• Liwia plana Lendzion, 1975
• Liwia convexa Lendzion, 1975

• Soomaspis Fortey & Theron, 1995

• Soomaspis splendida Fortey & Theron, 1995

• Tariccoia Hammann et al., 1990

• Tariccoia arrusensis Hammann et al., 1990