Kalloconus tschermaki ( Hoernes & Auinger, 1879 )

Harzhauser, Mathias & Landau, Bernard, 2016, A revision of the Neogene Conidae and Conorbidae (Gastropoda) of the Paratethys Sea, Zootaxa 4210 (1), pp. 1-178 : 71-72

Kalloconus tschermaki ( Hoernes & Auinger, 1879)

Figs 3 T, 14A1–A3, 14B1–B4

[ Rhizoconus ] Conus Tschermaki n. f.— Hoernes 1878a: 195 (nomen nudum).

[ Rhizoconus ] [ Conus ] Bittneri n. f.— Hoernes 1878a: 195 (nomen nudum).

Conus (Rhizoconus) Tschermaki nov. form.— Hoernes & Auinger 1879: 37, pl. 1, figs 1–2. Conus (Rhizoconus) Bittneri nov. form.— Hoernes & Auinger 1879: 38, pl. 5, fig. 3.

Type material. Syntype NHMW 1864 /0001/0499, Niederkreuzstetten ( Austria), illustrated in Hoernes & Auinger (1879, pl. 1, fig. 2); early Miocene , Karpatian (late Burdigalian) ; syntype NHMW 1853 /0003/0003a Gainfarn ( Austria) illustrated in Hoernes & Auinger (1879, pl. 5, fig. 2); middle Miocene , Badenian (late Langhian). Gainfarn ( Austria) is also the type locality of Conus bittneri Hoernes & Auinger 1879 (considered to be a junior synonym of C. tschermaki ).

Studied material. Syntypes and 2 spec. Niederkreuzstetten ( Austria) , NHMW 1846 /0037/0063; 5 spec. Niederkreuzstetten ( Austria) , NHMW 1846 /0037/0044; 1 spec. Gainfarn ( Austria) NHMW 1853 /0003/0003b, 1 spec. Gainfarn ( Austria) NHMW 1853 /0010/0003, 3 spec. Gainfarn ( Austria) NHMW 1853 /0010/0002; 4 spec. Enzesfeld ( Austria) 4 NHMW A 460.

Illustrated material. Figs 14A 1 –A3: syntype, Gainfarn (Austria): SL: 63.4 mm, MD: 37.0 mm, NHMW 1853/ 0003/0003a, illustrated in Hoernes & Auinger (1879, pl. 5, fig. 2); Figs 14 B1–B4, 3T: syntype, Niederkreuzstetten (Austria), SL: 75.3 mm, MD: 43.9 mm, NHMW 1864/0001/0499, illustrated in Hoernes & Auinger (1879, pl. 1, fig. 2); NHMW 1846/0037/0044.

Revised description. Moderately large, robust shells. Spire regularly conical, elevated, with moderately convex, smooth, bulgy whorls; suture deeply impressed to channelled, wavy and irregular. Last spire whorl less convex, forming a low-angled sutural ramp structured by prominent growth lines. Subsutural flexure of medium depth, moderately curved, moderately asymmetrical. Shoulder with rounded angulation coinciding with position of maximum diameter; last whorl regularly conical, not constricted; aperture straight, rather narrow, only weakly broadening towards short, weakly recurved canal; fasciole weak, slightly twisted and not well demarcated from base and lip. Faint spiral cords may appear on base. Colour pattern of last whorl consisting of slightly wavy and frequently interrupted spiral lines, separated by wider interspaces.

Shell measurements and ratios. n = 8: largest specimen: SL: 75.3 mm, MD: 43.9 mm, mean SL: 62.7 mm (σ = 7.5), mean MD: 36.8 mm (σ = 3.9), spire angle: µ = 108.3° (σ = 7.5°), last whorl angle: µ = 38.5° (σ = 2.0°), LW: µ = 1.7 (σ = 0.06), RD: µ = 0.7 (σ = 0.02), PMD: µ = 0.93 (σ = 0.02), RSH: µ = 0.16 (σ = 0.02).

Discussion. Monteiroconus hoernesi ( Doderlein, 1863) is superficially similar but differs in its broader shape, the deeper subsutural flexure and the wider and straight siphonal canal. Conus bittneri Hoernes & Auinger, 1879 , from Gainfarn, is most probably just an aberrant Kalloconus tschermaki with a pathologic spire.

Paleoenvironment. All occurrences point to shallow marine coastal habitats (e.g. Harzhauser et al. 2002; Zuschin et al. 2007).

Distribution in Paratethys. Karpatian (early Miocene): Alpine-Carpathian Foredeep: Niederkreuzstetten ( Austria) ( Hoernes & Auinger 1879); Badenian (middle Miocene): Vienna Basin: Gainfarn, Enzesfeld, Steinebrunn ( Austria) ( Hoernes & Auinger 1879); Eisenstadt-Sopron Basin: Forchtenau ( Hoernes & Auinger 1879).

Figures

FIGURE 1. Map of central and south – eastern Europe showing the geographic position of selected localities with rich Conidae diversities (modified from Kováč et al. 2007). 1: Korytnica (Poland), 2: Podhorce, Zukowce, Biłka, Tarnopol (Ukraine), 3: Grund, Guntersdorf, Immendorf (Austria), 4: Steinebrunn (Austria), Mikulov (Czech Republic), 5: Gainfarn, Enzesfeld, Baden, Bad Vöslau, Baden-Sooß (Austria), 6: Ritzing (Austria), 7: Weitendorf, Pöls (Austria), 8: Letkés, Szob (Hungary), 9: Borsodbóta (Hungary), 10: Várpalota (Hungary), 11: Hidas (Hungary), 12: Coşteiu de Sus, Lăpugiu de Sus (Romania).

FIGURE 14 A 1 – A 3. Kalloconus tschermaki (Hoernes & Auinger, 1879), Gainfarn (Austria), NHMW 1853 / 0003 / 0003 a, syntype. 14 B 1 – B 4. Kalloconus tschermaki (Hoernes & Auinger, 1879), Niederkreuzstetten (Austria), NHMW 1864 / 0001 / 0499, syntype. 14 C 1 – C 3. Kalloconus voeslauensis (Hoernes & Auinger, 1879), Bad Vöslau (Austria), NHMW 1849 / 0023 / 0005 a, syntype. 14 D 1 – D 3. Kalloconus voeslauensis (Hoernes & Auinger, 1879), Enzesfeld (Austria), NHMW 1853 / 0010 / 0005, syntype.