Lanarkia Temporal range: Upper Silurian PreꞒ Ꞓ O S D C P T J K Pg N
Lanarkia horrida Illustration c.1900
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Infraphylum:	Agnatha
Class:	†Thelodonti
Order:	†Furcacaudiformes
Family:	†Lanarkiidae
Genus:	†Lanarkia Traquair, 1898
Type species
Lanarkia horrida Traquair, 1898
Other species
Lanarkia lanceolata Marss & Ritchie, 1998 Lanarkia spinulosa Traquair, 1898
Synonyms
Lanarkia spinosa Traquair, 1898

Lanarkia is a genus of extinct thelodont agnathan which existed in what is now Scotland and Canada during the upper Silurian period.^[1]

There are two species of Lanarkia, Lanarkia spinosa and Lanarkia horrida.^{[citation needed]}

Lanarkia were very small fish specifically 30-45 cm in length that would have been possible prey to eurypterids.^[2]