There are two extant (living) species: •
Tachypleus gigas (
Müller, 1785) •
Tachypleus tridentatus (
Leach, 1819) And two extinct species only known from fossil. •
Tachypleus decheni (Zinken, 1862) Upper
Eocene Domsen Sands, Germany •
Tachypleus syriacus (Woodward, 1879) Upper Cretaceous (
Cenomanian) Haqel and
Hjoula Konservat-Lagerstatten, Lebanon ==References==