Isophelliidae Stephenson, 1935
Telmatactis allantoides (Bourne, 1918)
Telmatactis ambonensis (Kwietniewski, 1898)
Telmatactis australiensis Carlgren, 1950
Telmatactis carlgreni Doumenc, Chintiroglou, and Foubert, 1989
Telmatactis castanea (Bourne, 1918)
Telmatactis clavata (Stimpson, 1856)
Telmatactis collaris (Stimpson, 1856)
Telmatactis cricoides (Duchassaing, 1850)
Telmatactis cylicodes (Bourne, 1918)
Telmatactis daevisi (Haddon & Shackleton, 1893)
Telmatactis decora (Hemprich & Ehrenberg in Ehrenberg, 1834)
Telmatactis elongata
Telmatactis forskalii (Hemprich & Ehrenberg in Ehrenberg, 1834)
Telmatactis humilis (Verrill, 1928)
Telmatactis inequalis (Verrill, 1868)
Telmatactis insignis Carlgren, 1950
Telmatactis limnicola (Andres, 1881)
Telmatactis natalensis Carlgren, 1938
Telmatactis panamensis (Verrill, 1869)
Telmatactis phassonesiotes (Bourne, 1918)
Telmatactis rapanuensis (Carlgren, 1922)
Telmatactis roseni (Watzl, 1922)
Telmatactis sipunculoides (Haddon & Shackleton, 1893)
Telmatactis solidago (Duchassaing de Fombressin & Michelotti, 1864)
Telmatactis sollasi (Haddon, 1898)
Telmatactis stephensoni Carlgren, 1950
Telmatactis ternata (Kwietniewski, 1896)
Telmatactis vermiformis (Haddon, 1898)
Telmatactis vernonia (Duchassaing de Fombressin & Michelotti, 1864)
Telmatactis vestita (Johnson, 1861)
