Evolution of Janthina and Recluzia (Mollusca: Gastropoda: Epitoniidae)
Tate, Grange Burn Fm, Kalimnan (Zanclean)
Tate, Grange Burn Fm, Kalimnan (Zanclean
Figure 24. Specimens of Janthina typica (Bronn), all except A–C enlarged uniformly. (A–C) neotype designated here of Hartungia typica Bronn, 1861 and Janthina hartungi Mayer, 1864, MIGM1312, Farolim da Ponta do Norte (North Point Lighthouse), Santa Maria I., Azores, Zanclean (photos by C. Marques da Silva). (D, E) neotype designated here of Turbo postulatus Bartrum, AUGD G5721, Kaawa Creek, SW Auckland, New Zealand, Opoitian (Zanclean). (F–I) 2 specimens, Kaawa Creek, SW Auckland, Opoitian (Zanclean); F, I, GNS TM4670; G–H, GNS TM4671. (J, K, O) holotype of Acrybia (Hartungia) chouberti Chavan, Service Géologique du Maroc, Rabat, Morocco, P7064; unwhitened photos from Rabat sent by N. H. Ludbrook (see also Ludbrook 1978: 122, pl. 12, figs 17–19, at half this scale); Fouarat, E of Casablanca, Morocco, Zanclean. (L) abraded specimen, DBUA-F-428, University of the Azores, Ponta Delgado, Azores; from Ponta do Castelo, SE tip of Santa Maria I., Azores, Zanclean, coll. S. Ávila, 15 Sep 2006 (photo by S. Ávila). (M) NMB Po.6227, ex Mayer-Eymar collection; possible type material of Janthina hartungi Mayer, modelling clay impression from natural cast in rock, Ponta dos Matos, Santa Maria I., Azores, Zanclean.(N) GNS GS12289, E branch Greeks Creek,Arahura Valley, Westland, New Zealand, Waipipian (early Piacenzian). Scale bars 10 mm; upper bar applies to Figs 24A–C, lower bar applies to all other figures.
Figure 25.Specimens ofJanthina typica (Bronn).(A–C) GNS WM7656,Grange Burn Fm,Kalimnan (Zanclean),Muddy Creek,near Hamilton,Victoria,Australia; i.e., from type locality of Heligmope dennanti Tate.(D–F) copy of Mayer’s (1864: pl. 6, figs 41a–c) illustrations of Janthina hartungi, Santa Maria I., Azores, Zanclean; slightly enlarged from published size, H 19, D 22 mm (photos by D. L. Homer). (G, I–K, M) weakly sculptured specimen, MNHN IM.2000-27158, holotype of Eunaticina abyssalis Simone, Marion Dufresne cruise MD55 stn 45-CB79, 1500–1575 m, off Itaúnas, Espiritu Santo State, Brazil, SW Atlantic, probably Zanclean;G, SEM, apical 2.5 teleoconch whorls, showing outer calcitic layer removed; I–K, M, apertural,ventral,apical and posterior views.(H) GNS GS12164, fragment, Whenuataru Tuff (Waipipian, early Piacenzian), Tarawhenua Peninsula, Pitt I., Chatham Islands; oblique latero-dorsal view. (L) SAMA T1494A, lectotype designated here ofHeligmope dennanti Tate,Grange BurnFm, Kalimnan (Zanclean),Muddy Creek,near Hamilton,Victoria,Australia (photo by D. L. Homer).(N, Q, R, T) ULPGC LE20151–2, Universidad de Las Palmas de Gran Canaria, Canary Islands; largest two of six specimens from La Esfinge, Gran Canaria, Canary Islands, Zanclean; N, R, LE20152; Q, T, LE20151, broken outer lip partially retained in sediment. (O, P, S) copies of Bronn’s (1861: pl. 19, figs 3a–d) illustrations of the holotype of Hartungia typica; Santa Maria I., Azores, Zanclean; at published size, H 18, D 22 mm (photos by D. L. Homer). Scale bars:Fig.25G = 500 µm; Figs 25D–F and 25O–P, S are copies of published figures, approx.natural size; lower scale bar, 10 mm,applies to all other figures.