Lunataspis is the oldest known xiphosuran, with three known species all dating from the late Ordovician (latest Sandbian for L. borealis, Katian for L. gundersoni, earliest Hirnantian for L. aurora).
GENUS
via GBIF
Lunataspis is the oldest known xiphosuran, with three known species all dating from the late Ordovician (latest Sandbian for L. borealis, Katian for L. gundersoni, earliest Hirnantian for L. aurora).
==Discovery and species==
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).