Stylonuridae is a family of eurypterids, an extinct group of chelicerate arthropods commonly known as "sea scorpions".

Stylonuridae, which lived from Early Silurian to the Late Devonian, were small to very large forms with scales developing into tubercules and knobs.

The prosoma (head) exhibited variable shape, with arcuate compound eyes located subcentrally, or anteriorly.

The fixed spines on appendages II-IV could have been used as dragnets to rake through the sediment, indiscriminately entangling anything within their sweeping arc.

"Laurieipterines" are diagnosed as stylonurids with broad metastoma and an epistoma with a rostral field and were restricted to the Early Silurian.