Heterostegina reticulata italica Herb, 1978

Less, György, Özcan, Ercan, Papazzoni, Cesare A. & Stockar, Rudolf, 2008, The middle to late Eocene evolution of nummulitid foraminifer Heterostegina in the Western Tethys, Acta Palaeontologica Polonica 53 (2), pp. 317-350 : 338

Heterostegina reticulata italica Herb, 1978

Fig. 15D–K .

part 1978 Heterostegina reticulata italica ssp. nov.; Herb 1978: 759, 761, text−figs. 27–30 (non 36, 38).

2005 Heterostegina reticulata italica Herb, 1978 ; Less et al. 2005: 98, photo 101/7.

Diagnosis.— Heterostegina reticulata populations with X mean less than 1.7.

The equatorial section of A−forms.—The shape of the nicely arranged secondary chamberlets is nearly rectangular. For numerical features see Table 5.

Remarks.—The biometrical parameters of Heterostegina reticulata from sample Possagno 2, very close to the type locality of Herb’s (1978) H. reticulata italica , indicate that populations with the above definition belong to this subspecies. The figure of Less et al. (2005) cited in the above synonymy list illustrates a specimen from sample Noszvaj, Attila−kút.

Geographic and stratigraphic distribution.—Late early Priabonian (SBZ 19B) of N Italy (Mossano, sample 8), “middle” Priabonian (SBZ 19/20) of Hungary (Noszvaj, Attila−kút) to the very end of the Eocene (SBZ 19 B−20) and late Priabonian (SBZ 20) of N Italy (Calcare di Santa Giustina, samples Possagno 1 and 2).

Figures

Fig. 15. Priabonian Heterostegina from different Western Tethyan localities. A–C. Heterostegina reticulata mossanensis ssp. nov., earliest Priabonian, SBZ 19 A. A. Verona (N Italy), Castel San Felice, hairpin bend: MÁFI E. 9565, A−form, equatorial section. B, C: Mossano 7 (N Italy), A−form, equatorial sections, MÁFI E. 9566 (B), MÁFI E. 9567 (C). D–K. Heterostegina reticulata italica Herb, 1978. D, H. Mossano 8 (N Italy), late early Priabonian, SBZ 19 B, A−form, equatorial sections, MÁFI E. 9568 (D), MÁFI E. 9569 (H). E–G, I. Noszvaj (Hungary), “middle” Priabonian, SBZ 19/20. E–G. A−form, equatorial sections, MÁFI E. 9570 (E), MÁFI E. 9571 (F), MÁFI E. 9494 (G). I. MÁFI E. 9572, external view. J, K. Possagno 1 (NE Italy), late Priabonian, Ą