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 conicomaculatus
(Sacco, 1893)
Figs 17
P, 24G1–G3
Conus Mercati
Brocc.
—Hörnes 1851: 23 (partim), pl. 2, figs 3a–c.
Conus
(
Lithoconus
)
Mercati
Brocc.
—
Hoernes & Auinger 1879
: 27
(partim).
[
Conus
(
Lithoconus
)
]
conicomaculata
Sacc.—
Sacco 1893a
: 20
[nov. nom. pro
Conus mercati in
Hörnes 1851
, pl. 2, fig. 3].
Type
material.
Holotype
NHMW
1860
/0001/0054a, illustrated in
Hörnes
(1851, pl. 2, fig. 3),
Mikulov-Kienberk
(
Czech Republic
); middle
Miocene
,
Badenian
(late
Langhian
).
Studied material.
Holotype
and 2 spec.
NHMW
1860
/0001/00054,
Mikulov-Kienberk
(
Czech Republic
).
Illustrated
material.
Figs
17
P, 24G1–G3:
Mikulov-Kienberk
(
Czech Republic
): SL:
60.1 mm
, MD:
37.8 mm
NHMW
1860
/0001/00054.
Revised description.
Medium-sized shells with low conical spire consisting of broad, flat to slightly concave spire whorls with weak striae. Subsutural flexure shallow, moderately curved, moderately asymmetrical. Distinct, subangulate shoulder; position of maximum diameter slightly below shoulder. Last whorl broadly conical to weakly ventricose, not constricted; few weak spiral cords on base. Aperture wide with straight outer lip. Siphonal canal wide, short, straight; siphonal fasciole weakly swollen. Colour pattern under UV light consisting of about 12 spirals of wide-spaced subquadratic to elongate rectangular blotches.
Shell measurements and ratios.
Only
3 specimens
are available: SL: 60.1/53.3/
49.5 mm
, MD: 37.8/32.9/
31.3 mm
, spire angle: 118/110/119°, last whorl angle: 41/37/38°, LW: 1.59/1.62/1.58, RD: 0.71/0.72/0.73, PMD: 0.85/ 0.91/0.85, RSH: 0.12/0.14/0.14.
Discussion.
This species was introduced by
Sacco (1893a)
as variety name of
Conus mercati
Brocchi, 1814
. Morphologically, it is very similar to Pliocene specimens of
Monteiroconus mercati
(
Brocchi, 1814
)
as shown by
Pinna & Spezia (1978)
and
Hall (1966)
. Nevertheless, it differs in its striate spire whorls, which are smooth in
M. mercati
(see discussion in
Landau
et al
. 2013
). The smaller size, higher spire and shorter last whorl allow a separation from
Monteiroconus mojsvari
(
Hoernes & Auinger, 1879
)
.
Paleoenvironment.
Shallow marine seagrass environments.
Distribution in Paratethys.
Badenian (middle Miocene):
Vienna
Basin:
Mikulov-Kienberk (
Czech Republic
) (Hörnes 1851).