FIGURE 1. Location of the study area and of the Torrente Cinghio and Moncasale sites (asterisks) in the structural map ( 1) of northern Italy (modified from Scrocca et al., 2003) and in their respective geological setting ( 2-3) as modified from Papani (2002) and Di Dio and Zanzucchi (2005).
FIGURE 2. Leptochiton lignatilis n. sp. from the Miocene (Tortonian) of Torrente Cinghio (Parma, N Italy, type locality). 1-4. Holotype, tail valve MGPT-PU 108787 in dorsal ( 1), ventral ( 2) and lateral ( 3) views, and close up (white rectangle in 1) showing sculpture ( 4). 5. Paratype NHMW 2014/0451/0002, tail valve with a more protruding mucro. 6-7. Paratype MGPT-PU 108788, head valve in dorsal view ( 6) and close up (white rectangle in 6) showing sculpture ( 7). 8-9. Paratype MZPD MAL-2074, intermediate valve in dorsal view ( 8) and close up (white rectangle in 8) showing granules with aesthetes ( 9).
FIGURE 3. Leptochiton lignatilis n. sp., from the Miocene (Tortonian) of Torrente Cinghio (Parma, N Italy, type locality). 1-2. Paratype MZB 32033, intermediate valve in dorsal ( 1) and profile view ( 2). 3-4. Paratype NHMW 2014/0451/0001, fragment of a tail valve showing apophysis (ap in 3) and close-up (white rectangle in 3) showing variation in granule shape ( 4) from circular (white triangles) to elongate (black triangles). 5-8. Paratype MZPD MAL-2076, detail of a fragment of an intermediate valve showing granule arrangement ( 5, 7) and macro and microaesthetes ( 6, 8.
FIGURE 4. Leptochiton lignatilis n. sp., from the Miocene (Langhian) of Moncasale di Casina (Reggio Emilia, N Italy). 1. Paratype MZPD MAL-2077, dorsal view of a fragment of an intermediate valve. 2. Close-up of the specimen as in Figure 4.1 showing granules.