Trimerellidae was a widespread family of warm-water brachiopods ranging from the Middle Ordovician ("Llandeilo" / Darriwilian) to the late Silurian (Ludlow).

[2] Most individuals were free-living, though some (namely Australian populations of the genus Eodinobolus) clustered into large congregations similar to modern oyster reefs.

[2][3] Trimerellides probably originated from tropical island arcs in the region of Kazakhstania (present-day Kazakhstan) during the "Llandeilo" (late Darriwilian stage).

By the late Sandbian and early Katian stages, many dispersed eastward to nearby regions equivalent to South China and Australia.

A few managed to populate the vicinity of Laurentia (North America), possibly through its diminishing proximity to the Australian portion of Gondwana.

Trimerellides managed to recover slightly during the late Wenlock Epoch (mid-Silurian), experiencing a mild rediversification at the species level.