Thamnocephalidae Packard 1883

Thamnocephalidae Simon 1886; Linder 1941; Brendonck & Belk 1997; Brtek & Mura 2000; Dumont & Negrea 2002; Rogers 2003b

Diagnosis. Penes close­set, basal portions soft or rigid, with one or more longitudinal rows of spines. Eversible portion typically becoming explanate distally. Vas deferens looped. Seminal vesicles absent. Second maxillae with single apical setae. Eleven pairs of thoracopods, each bearing a single pre­epipodite. Adults range in length from 6 to 60mm. 60+ species total, reported from all continents except Antarctica.