Glaucus of Rhegium (Γλαῦκος ὁ Ῥηγῖνος) was a Greek writer from the Chalcidian colony of Rhegium in southern Italy, active in the 5th century BCE during the early Classical period [1][2][3]. No specific biographical details about his life are recorded.

His sole known work is On the Ancient Poets and Musicians (Περὶ τῶν ἀρχαίων ποιητῶν καὶ μουσικῶν), now lost but preserved in fragments. It stands as one of the earliest works of Greek literary and musical criticism [1][2][3].

Glaucus is significant as an early historian of music and poetry. Later authors frequently cite him as a source on early Greek poets like Terpander and Olympus, and he engaged in comparative criticism, such as judging Archilochus superior to Homer in certain respects [1][2]. His work represents an important fragmentary strand of West Greek intellectual history focused on cultural origins [3].

Sources 1. Oxford Research Encyclopedia of Classics: https://oxfordre.com/classics/view/10.1093/acrefore/9780199381135.001.0001/acrefore-9780199381135-e-2857 2. Perseus Digital Library, Smith's Dictionary of Greek and Roman Biography and Mythology: http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0104%3Aentry%3Dglaucus-bio-15 3. ToposText: https://topostext.org/people/1440