In Greek mythology, Mecisteus (Ancient Greek Μηκιστεύς) is son of Talaus and Lysimache, brother of Adrastus, and father of the Epigone Euryalus by Astyoche. He joins the war against Thebes (in some lists among the Seven), and Homer recalls him winning all the boxing matches at Oedipus' funeral games. Distinct from Homeric fighters and suitors who share the name.
Adapted from Wikipedia, "Mecisteus" · CC BY-SA 4.0
I.Son of Talaus
Apollodorus lists Mecisteus among the sons Talaus begets on Lysimache — with Adrastus, Pronax, Aristomachus, and Eriphyle in the same Argive roll. By Astyoche he fathers Euryalus, who later sails with Diomedes and fights among the Epigoni.
As an Aeolid through the Bias–Talaus line he sits in the Argive royalty that drives the Theban wars and the Homeric Argive command.
II.Thebes and the games
He attacks Thebes with his brother Adrastus. Aeschylus' Seven Against Thebes omits him from the seven champions, but the Bibliotheca knows a version in which he replaces Tydeus among the seven; Herodotus also counts him among the attackers. In the Iliad Nestor recalls Mecisteus at Oedipus' funeral games in Thebes, where he won every boxing bout.
The atlas id mecisteus-aeolid is this Talaionid alone — not mecisteus-echius (Achaean fighter), not the Halizone father, and not Odyssey suitor namesakes.