FIGURE 1. Locality and geological background of sampling site: A, study area; B, and general geological background of Miaoli area (adapted from Ho et al., 2022).
FIGURE 2. Species of families Atlantidae and Creseidae from the Toukoshan Formation, Miaoli, northern Taiwan. A, Atlanta turriculata, ASIZF0101021; B–E, Creseis acicula, ASIZF0101022–025; F, Styliola subula, ASIZF0101026, arrows indicate the groove on the specimen. Scale bars A, B–E, F equal 1 mm.
FIGURE 3. Species of the family Cavoliniidae, subfamily Cavoliniinae from the Toukoshan Formation, Miaoli, northern Taiwan. A–B, Cavolinia globulosa, ASIZF0101027–028; C, Cavolinia cf. gibbosa, ASIZF0101029; D, Cavolinia cf. tridentata, ASIZF0101030. Scale bars A–C, D equal 1 mm.
FIGURE 4. Diacavolinia longirostris from the Toukoshan Formation, Miaoli, northern Taiwan. A–I, ASIZF0101031–039. Scale bars A–B, C–I equal 1 mm.
FIGURE 5. Species of the family Cavoliniidae, subfamily Diacriinae from the Toukoshan Formation, Miaoli, northern Taiwan. A, Diacavolinia cf. bandaensis, ASIZF0101040; B–C, Diacria cf. philippinensis, ASIZF0101041–042; D–E, Telodiacria quadridentata, ASIZF0101043–044. Scale bars A, D–C, D–E equal 1 mm.
FIGURE 6. Combined records of fossil occurrences from the literature of pteropods and heteropods in the West Pacific region. A, species of the family Atlantidae; B, species of the family Creseidea and Cavoliniidae.
