The Lower Pliocene marine gastropods of Santa Maria Island, Azores: Taxonomy and palaeobiogeographic implications Author Sacchetti, Claudia 0000-0002-3225-3139 claudiasacc@icloud.com Author Landau, Bernard 0000-0002-7768-8494 bernardmlandau@gmail.com Author Ávila, Sérgio P. 0000-0002-3225-3139 claudiasacc@icloud.com text Zootaxa 2023 2023-05-24 5295 1 1 150 http://dx.doi.org/10.11646/zootaxa.5295.1.1 journal article 53396 10.11646/zootaxa.5295.1.1 82286fdc-a858-447c-9980-da2e8985d19c 1175-5326 7965273 F3A52660-70B8-439F-A7A0-F45ADC975EA5 Distorsio mcgintyi Emerson & Puffer, 1953 Plate 4 E 1 -E 3 Distorsio ( Distorsio ) decussatus simillimus (Sowerby) —Woodring ( partim ) 1928: 300, pl. 18, fig. 9, pl. 19, fig. 1. Distorsio constricta floridana Olsson & McGinty 1951: 27 , pl. 1, figs. 5, 6, 9 (junior secondary homonym of Personella floridana Gardner, 1947 , transferred to Distorsio by Emerson & Puffer, 1953 ). * Distorsio mcgintyi Emerson & Puffer 1953: 101 (replacement name for D. floridana Olsson & McGinty, 1951 , preoccupied). Distorsio constricta macgintyi Emerson & Puffer, 1953 — Abbott 1954: 197 , pl. 25z. Distorsio ( Rhysema ) mcgintyi Emerson & Puffer — Clench & Turner 1957: 240 , pl. 132, figs. 9-10; pl. 134, figs. 1-5. Distorsio macgintyi — Parker 1960: 323 , pl. 5, fig. 4. Distorsio mcgintyi Emerson & Puffer, 1953 — Warmke & Abbott 1961: 103 , pl. 18, fig. c. Distorsio constricta macgintyi Emerson & Puffer — Lewis 1972 , fig. 40. Distorsio ( Rhysema ) mcgintyi Emerson & Puffer — Kilias 1973: 204 , fig. 146. Distorsio macgintyi Emerson & Puffer — Morris 1973: 185 , pl. 50, fig. 8. Distorsio constricta macgintyi Emerson & Puffer, 1953 — Abbott 1974: 166 , fig. 1771. Distorsio constricta macgintyi Emerson & Puffer, 1953 — Rios 1975: 80 , pl. 22, fig. 328. Distorsio macgintyi Emerson & Puffer 1953 — Humfrey 1975: 125 , pl. 14, fig. 2, 2a. Distorsio constricta macgintyi Emerson & Puffer — Laursen 1981: 27 , fig. 43. Distorsio ( Rhysema ) constricta mcgintyi Emerson & Puffer, 1953 — Coelho et al. 1981: 132 , fig. 14. Distorsio constricta macgintyi Emerson & Puffer, 1953 — Rios 1985: 78 , pl. 28, fig. 341. Distorsio constricta macgintyi Emerson & Puffer, 1953 — Parth 1989a: 52 , centre right fig. Distorsio macgintyi Emerson & Puffer, 1953 — Parth 1989b: 8 , bottom left fig. Distorsio macgintyi Emerson & Puffer, 1953 — Lipe & Abbott 1991: 14 , illus. Distorsio macgintyi Emerson & Puffer, 1952 [ sic ]— Henning & Hemmen 1993: 143 , pl. 28, fig. 4. Distorsio mcgintyi Emerson & Puffer, 1953 — Díaz & Puyana 1994: 172 , fig. 648. Distorsio constricta macgintyi Emerson & Puffer, 1953 — Rios 1994: 91 , pl. 30, fig. 359. Distorsio constricta macgintyi Emerson & Puffer, 1953 — Kronenberg 1994: 70 , text-fig. 10, pl. 1, fig. 3; pl. 2, fig. 7. Distorsio constricta macgintyi Emerson & Puffer, 1953 — Pointier & Lamy 1998: 99 , figure. Distorsio constricta ( Broderip, 1833 ) —Beu 2001: 712, fig. 1.9 ( non Triton constrictus Broderip, 1833 ). Distorsio mcgintyi Emerson & Puffer, 1953 — Lee 2009: 84 , fig. 408. Distorsio constricta macgintyi Emerson & Puffer, 1953 — Rios 2009: 165 , fig. 394. Distorsio mcgintyi Emerson & Puffer, 1953 — Beu 2010: 92 , pl. 13, figs. 2-3, 6-8; pl. 17, figs. 6, 8; pl. 18, figs. 1-2, 4-5, 7-9; pl. 19, figs. 1, 4. Distorsio mcgintyi Emerson & Puffer, 1953 — Landau & Silva 2010: 57 , pl. 11, figs. 9-10. Santa Maria material examined. Maximum height 31.0 mm, width 18.0 mm. DBUA-F 1189-1 (1), Pedra-que-pica, Santa Maria, Azores , Touril Complex, Lower Pliocene. Revised description. See Beu (2010: 92) . Discussion. Distorsio mcgintyi Emerson & Puffer, 1953 is a member of a group of strongly distorted Distorsio species including also Distorsio constricta ( Broderip, 1833 ) , Distorsio jenniernestae Emerson & Piech, 1992 and Distorsio minoruohnishii Parth, 1989 . Distorsio mcgintyi has the most distorted shell of this group. For full discussion and comparison see Beu (2010) . This is the first record of the species outside the western Atlantic area, and it is interesting to record that in the early Pliocene the range of D. mcgintyi extended to include the Azores Archipelago. The rest of the Santa Maria assemblage has a more strongly Mediterranean character but the typical Pliocene Mediterranean D. cancellina ( Lamarck, 1803 ) is easily separated by its less distorted spire and more rounded last whorl. Therefore, three Tonnoidean species are shared in common with the Tropical West Atlantic: D. mcgintyi , Monoplex comptum (A. Adams, 1855 ) , and Aspa marginata ( Gmelin, 1791 ) . Distribution. Lower Miocene: Kendace Siltstone, Carriacou ( Beu 2010 ); Baitoa Formation, Dominican Republic ( Beu 2010 ); Cantaure Formation, Venezuela ( Beu 2010 ). Middle Miocene: Carriacou, Grenadine Islands ( Beu 2010 ); Mayo River, Trinidad ( Beu 2010 ). Upper Miocene: Cercado Formation, Dominican Republic ( Beu 2010 ); Gatun Formation, Panama ( Beu 2010 ); Mataruca Member of Caujarao Formation, El Carrizal, Venezuela ( Beu 2010 ). Lower Pliocene: Araya Formation, Cubagua Island, Venezuela ( Landau & Silva 2010 ); Punta Gavilán Formation, Falcón , Venezuela ( Beu 2010 ); Bocas del Toro , Panama ( Beu 2010 ); Gurabo Formation, Dominican Republic ( Beu 2010 ); Atlantic, Santa Maria Island, Azores (this paper). Lower-Upper Pliocene: Cayo Agua and Shark Hole Point Formations, Bocas del Toro , Panama ( Beu 2010 ); Bowden Formation, Jamaica ( Woodring 1928 ( partim ), as D. decussatus simillimus ; Robinson, 1991 ). Upper Pliocene: Agueguexquite Formation, Mexico ( Beu 2010 ). Lower Pleistocene: Moin Formation, Puerto Limon , Costa Rica ( Beu 2010 ) . Upper Pleistocene: Swan Cay Formation, Bocas del Toro , Panama ( Beu 2010 ). Recent: Western Atlantic, from Cape Hatteras, North Carolina, Florida and Bermuda to southernmost Brazil , and possibly further south ( Beu 2010 ).