| Scientific name | Authorship | Rank | Status | Images | |
|---|---|---|---|---|---|
| Thetidia undulilinea | (Warren, 1905) | species | Accepted | ||
| Thevitella alphalis | Viette, 1958 | species | Accepted | ||
| Thiacidas acronictoides | (Berio, 1950) | species | Accepted | ||
| Thiacidas albescens | (Gaede, 1939) | species | Synonym | ||
| Thiacidas albicans | (Berio, 1954) | species | Misapplied | ||
| Thiacidas alboporphyrea | (Pagenstecher, 1907) | species | Accepted | ||
| Thiacidas berenice | (Fawcett, 1916) | species | Accepted | ||
| Thiacidas callipona | (Bethune-Baker, 1911) | species | Accepted | ||
| Thiacidas canemarmorea | (Hacker, 2004) | species | Synonym | ||
| Thiacidas cerurodes | (Hampson, 1916) | species | Accepted | ||
| Thiacidas cerurodes adnanensis | (Wiltshire, 1980) | subspecies | Accepted | ||
| Thiacidas cerurodes asiriensis | (Hacker & Fibiger, 2002) | subspecies | Synonym | ||
| Thiacidas cerurodes cerurodes | (Hampson, 1916) | subspecies | Accepted | ||
| Thiacidas cheituna | (Brandt, 1939) | species | Synonym | ||
| Thiacidas cookei | (Pinhey, 1958) | species | Accepted | ||
| Thiacidas diplogramma | (Hampson, 1905) | species | Accepted | ||
| Thiacidas dukei | (Pinhey, 1968) | species | Accepted | ||
| Thiacidas dukei dukei | (Pinhey, 1968) | subspecies | Accepted | ||
| Thiacidas dukei morettoi | Hacker & Zilli, 2010 | subspecies | Accepted | ||
| Thiacidas duplicata | (Grünberg, 1910) | species | Synonym | ||
| Thiacidas fasciata | (Fawcett, 1918) | species | Accepted | ||
| Thiacidas fasciata | (Hampson, 1926) | species | Misapplied | ||
| Thiacidas fractilinea | (Pinhey, 1968) | species | Accepted | ||
| Thiacidas fuscomacula | Hacker & Zilli, 2010 | species | Accepted | ||
| Thiacidas hampsoni | (Hacker, 2004) | species | Accepted |
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version 2023-09-18