dactylethra noun2 •One of several hollow fingerlike projections found on some bryozoans, used to absorb nutrients.Erkosonea differs from that genus in the presence of dactylethrae instead of tergospores. — 1920 •A finger sheathThe egg gauze was carefully collected from the field after 48 h of exposure and maintained within 10 ml glass dactylethrae. — 2016 formsdactylethrae