Thalamnita prymna — Hill et al. 1975: 59; Morton 1976: 100; Hill et al. 1978: 83; Morton 1979a: 115, fig. 6.15; Morton 1979b: 136, tab. 7.1.
Thalamita prymna — Shin and Thompson 1982: app.; Morton and Morton 1983: 94, fig. 7.3(11).
Taxonomy: Crosnier (1962: as Thalamita), Wee and Ng (1995: as Thalamita); Yang et al. (2012: as Thalamita).
Type: Neotype ò NHM 1890.10.20.51 -52 (designated by Wee and Ng 1995).
Type locality: Tuticorin, Southeast India (neotype).
Distribution: Western Indian Ocean to West Pacific: verified records from Madagascar, East Africa, India, Andaman Islands, Malaysia, Singapore, South China, Japan, and Australia (Wee and Ng 1995).
Habitat: Intertidal and subtidal; among rocky or coral reefs (Yang et al. 2012).
Remarks: Many past records under this name appeared to be composite (Wee and Ng 1995; Apel and Spiridonov 1998; Yang et al. 2012), and local records probably also include T. pelsarti (see Remarks under T. pelsarti above).