A revision of the Neogene Conidae and Conorbidae (Gastropoda) of the Paratethys Sea
Author
Harzhauser, Mathias
Author
Landau, Bernard
text
Zootaxa
2016
4210
1
1
178
journal article
37280
10.11646/zootaxa.4210.1.1
e782e07d-76b7-4e9b-ba34-ed3286254ec6
1175-5326
252966
D39416B8-CF85-440B-84C2-D4380BECC4E3
Monteiroconus pervindobonensis
(Sacco, 1893)
Figs 26
E1–E2
Conus betulinoides
Lam.
—Hörnes 1851: 16, pl. 1, figs 1a–b [non
Kalloconus betulinoides
(
Lamarck, 1810
)
].
Conus
(
Dendroconus
)
betulinoides
Lam.
—
Hoernes & Auinger 1879
: 17 [non
Kalloconus betulinoides
(
Lamarck, 1810
)
]. [
C
o
nus
(
Dendroconus
)
betulinoides
(Lk.)
] varietà
pervindobonensis
Sacc.
—
Sacco 1893a
: 4 [nov. nom. pro
Conus betulinoides
sensu Hörnes 1851, pl. 1, fig. 1].
Type material.
The holotype illustrated in Hörnes (1851, pl. 1, fig. 1) is lost.
Studied material.
1 spec. NHMW 1869/0001/0020, 1 spec. NHMW 2010/0004/1574, 2 spec.
NHMW
2010
/ 0004/1575
Bad Vöslau
(
Austria
)
;
1 spec
NHMW
A989
Immendorf
(
Austria
)
;
2 spec.
NHMW
1852
/0012/0010, 2
NHMW
1851
/0026/0004
Grund
(
Austria
)
.
Illustrated
material.
Figs
26
E1–E2:
Bad Vöslau
(
Austria
): SL: 124.5, mm, MD: 74.0 mm, 1 spec.
NHMW
1869
/0001/0020.
Revised description.
Very large shells with low spire; spire whorls striate, weakly convex with shallow central concavity in some specimens. Subsutural flexure shallow and asymmetrically curved. Shoulder rounded or faintly subangulate, position of maximum diameter close below shoulder. Last whorl elongate, regular conical in dorsal view, ventricose in apertural view; not constricted. Aperture wide, slightly excavated at junction from fasciole and inner lip. Fasciole broad, swollen, demarcated from glossy, inner lip by distinct groove. Growth lines on last whorl below shoulder prosocline and straight. Siphonal canal wide, slightly deflected. No colour pattern preserved.
Shell measurements and ratios.
n = 5: largest specimen: SL:
124.5 mm
, MD: 74.00 mm, mean SL:
101.3 mm
(σ = 13.3), mean MD:
62.8 mm
(σ = 6.5), spire angle: µ = 135.6° (σ = 7.3°), last whorl angle: µ = 39.2° (σ = 2.6°), LW: µ = 1.61 (σ = 0.08), RD: µ = 0.69 (σ = 0.02), PMD: µ = 0.9 (σ = 0.02), RSH: µ = 0.1 (σ = 0.02), Hörnes (1851, pl. 1, fig. 1) reports a height of
128 mm
and a width of
73 mm
for the illustrated but lost specimen.
Discussion.
The specimen of Hörnes (1851, pl. 1, fig. 1) from Steinebrunn was already lost in 1879 (
Hoernes & Auinger, 1879
) and only a few additional specimens in the NHMW collection are available. Unfortunately, Hörnes (1851) presented only the dorsal view of his specimen. Therefore, the conspecificity with the Pliocene
Kalloconus betulinoides
(
Lamarck, 1810
)
remained unchallenged. Only
Sacco (1893a)
proposed the variety name
pervindobonensis
for this specimen, without discussing specific differences from the type. A re-investigation of the few additional Paratethyan specimens seems to support Sacco’s position. The concave and striate spire whorls, the excavated columella and the deflected siphonal canal of the Vienna Basin specimens differ from the Italian
Kalloconus betulinoides
as illustrated by
Davoli (1972)
,
Pinna & Spezia (1978)
and
Chirli (1997)
. The shell is broader and club-shaped, the last whorl less elongate and the last spire whorl is narrower. Therefore, we propose to separate the middle Miocene Paratethyan shells as
Monteiroconus pervindobonensis
(Sacco, 1893)
. The generic placement is based on the concave and striate spire whorls.
Paleoenvironment.
The specimens from Bad Vöslau, Grund and Immendorf were found in clays indicating an offshore environment but transport from shallow habitats cannot be excluded (
Zuschin
et al.
2005
,
2006
).
Distribution in Paratethys.?
Karpatian (early Miocene):
Alpine-Carpathian Foredeep
: Niederkreuzstetten (
Austria
) (Harzhauser 2002). Badenian (middle Miocene):
Vienna
Basin:
Gainfarn, Steinebrunn, Bad Vöslau, (
Austria
);
Alpine-Carpathian Foredeep
: Grund, Immendorf (
Austria
) (
Hoernes & Auinger 1879
);? Korytnica (
Poland
) (
Bałuk 1997
);?
Pannonian Basin
: Letkés, Márkháza, Mátraverebély, Sámsonháza,
Budapest
: Rákos (
Hungary
) (
Kovács & Vicián 2013
);?
Krka Basin
: Gorenje Vrhpolje (
Slovenia
) (
Mikuž 2009
).