What is "myrmecium"

Myrmecium can refer to:

• Myrmecium (spider), a genus of ant-like spiders from South America (Castianeirinae)
• Myrmecium (sponge) (Goldfuss), a genus of extinct Calcareous sponges ( Pharetronida: Sestromellidae). 1
• Myrmecium (place), a little ancient city near the Bosporus

Myrmecium is a genus of ant-mimicking spiders. The 16 known species occur only in South America.

Eugène Simon described the totally unrelated jumping spider species Synemosyna formica as Myrmecium lunatum in 1897; Mello-Leitao described the same species as Myrmecium rubrum in 1932.