Andonia sp.

Scarponi, Daniele, Bella, Giano Della, Dell’Angelo, Bruno, Huntley, John Warren & Sosso, Maurizio, 2016, Middle Miocene conoidean gastropods from western Ukraine (Paratethys): Integrative taxonomy, palaeoclimatogical and palaeobiogeographical implications, Acta Palaeontologica Polonica 61 (2), pp. 327-344 : 340

Andonia sp. aff. A. transsylvanica ( Hoernes and Auinger, 1890)

Figs. 7D , 8E, F ; SOM 1: fig. 3I, SOM 2.

Material. — Four specimens from Varovtsi, Pidhirtsi Beds, early Serravallian; MGGC-24523 /1–4, one juvenile specimen is complete (SOM 2).

Remarks. — A. transsylvanica is a rare species with affinity to A. bonelli ( Bellardi and Michelotti, 1840) . Our specimens fall within the morphological variability of the original type material illustrated in Hoernes and Auinger (1890: pl. 32: 9, 11) and housed at NHMW (two syntypes, inventory number 1867/0019/0172; Mathias Harzhauser, personal communication 2014). The two syntypes, however, show quite different morphological features, and recently were considered to belong to different species ( Landau et al. 2013). The latter authors designated as lectotype of A. transsylvanica the shell illustrated as fig. 9 in Hoernes and Auinger (1890; SOM 1: fig. 4J), and considered the shell illustrated as fig. 11 as an open nomenclature species. The material from Ukraine is perhaps conspecific with the latter unnamed specimen (i.e., Hoernes and Auinger 1980: fig. 11; SOM 1: fig. 4K, SOM 2). Unfortunately, our material (and the material housed at NHMW) is scanty and not well preserved. Given these premises, it is preferable at the moment to leave this taxon in open nomenclature: more material is needed to study in detail its variability and its taxonomic relation to allied material from the Miocene of the North Sea Basin (see Janssen 1984).

Figures

Fig. 7. SEM images of protoconch features of conoidean gastropods from early Serravallian of western Ukraine, Varovtsi (A, C–F) and Horodok (B). A. Bela? robusta sp. nov., MGGC-24519/8. B. Pyrgocythara turrispiralata sp. nov., MGGC-24515/11. C. Raphitoma cf. R. ringicula (Boettger, 1902), MGGC-24522/5. D. Andonia sp. aff. A. transsylvanica (Hoernes and Auinger, 1890), MGGC 24523/2. E. Teretia cf. T. turritelloides Bellardi, 1847), MGGC-24524/5. F. Haedropleura sp. aff. H. septangularis (Montagu, 1803), MGGC-24520/6. Views: A1, B1, C–F, lateral; A2, B2, apical. Scale bars 0.1 mm.

Fig. 8. SEM images of shell features of conoidean gastropods from early Serravallian of western Ukraine, Horodok (A, B) and Varovtsi (C–J). A, B. Pyrgocythara turrispiralata sp. nov. A. MGGC-24515/11. B. MGGC-24515/9. C, D. Raphitoma cf. R. ringicula (Boettger, 1902). C. MGGC-24522/1. D. MGGC-24522/3. E, F. Andonia sp. aff. A. transsilvanica (Hoernes and Auinger, 1890). E. MGGC-24523/1. F. MGGC-24523/3. G, H. Teretia cf. T. turritelloides (Bellardi, 1847).G. MGGC-24524/3. H. MGGC-24524/5. I, J. Haedropleura sp. aff. H. septangularis (Montagu, 1803). I. MGGC-24520/6. J. MGGC-24520/11. Views: A1, C1, E1, G1, I1, apertural; B, D, E2, H, I2, dorsal; A2, C2, F, G2, J, lateral. Scale bars 1 mm.