The Architectonicidae and Mathildidae (Gastropoda, Heterobranchia) of the Miocene Paratethys Sea-victims of the Miocene Climatic Transition
Author
Harzhauser, Mathias
0000-0002-4471-6655
Natural History Museum Vienna, Burgring 7, 1010 Vienna, Austria. mathias. harzhauser @ nhm-wien. ac. at; https: // orcid. org / 0000 - 0002 - 4471 - 6655;
mathias.harzhauser@nhm-wien.ac.at
Author
Landau, Bernard
0000-0002-4471-6655
Natural History Museum Vienna, Burgring 7, 1010 Vienna, Austria. mathias. harzhauser @ nhm-wien. ac. at; https: // orcid. org / 0000 - 0002 - 4471 - 6655; & Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, Netherlands; Instituto Dom Luiz da Universidade de Lisboa, Campo Grande, 1749 - 016 Lisboa, Portugal; and International Health Centres, Av. Infante de Henrique 7, Areias São João, P- 8200 Albufeira, Portugal. bernardmlandau @ gmail. com; https: // orcid. org / 0000 - 0002 - 7768 - 8494 & Natural History Museum Vienna, Burgring 7, 1010 Vienna, Austria. mathias. harzhauser @ nhm-wien. ac. at; https: // orcid. org / 0000 - 0002 - 4471 - 6655;
mathias.harzhauser@nhm-wien.ac.at
text
Zootaxa
2023
2023-11-14
5370
1
1
74
https://www.mapress.com/zt/article/download/zootaxa.5370.1.1/52270
journal article
10.11646/zootaxa.5370.1.1
1175-5334
10147814
48903495-7C6C-46E4-9B1B-D6A2F2781873
Granosolarium semilaevis
(Sacco, 1892)
Figs 4K
,
13A–D
Solarium millegranum
Lam.
—
Ĥrnes 1848: 22
[
non
Granosolarium millegranum
(
Lamarck, 1822
)
].
Solarium millegranum
Lam.
—Ĥrnes 1856: 465, pl. 46, figs 4a–c [
non
Granosolarium millegranum
(
Lamarck, 1822
)
].
Solarium millegranum
Lam.
—Neugeboren 1856: 194 [
non
Granosolarium millegranum
(
Lamarck, 1822
)
].
* [
Solarium
(
Granosolarium
)
millegranum
] var.
semilaevis
Sacc.
—Sacco 1892: 61.
Solarium
(
Granosolarium
)
millegranum
Lmk.
—Boettger 1907: 135 [
non
Granosolarium millegranum
(
Lamarck, 1822
)
].
Solarium millegranum
Lmk.
—Montanaro Gallitelli & Tacoli 1951: 177, pl. 2, fig. 5 [
non
Granosolarium millegranum
(
Lamarck, 1822
)
].
Architectonica
(
A
[
rchitectonica
].)
millegranum
(Lm.)
—Sieber 1958: 139 [
non
Granosolarium millegranum
(
Lamarck, 1822
)
].
Architectonica
(
Architectonica
)
millegranum
Lamarck
—
Marinescu 1961: 532
, pl. 5, figs 20a–f [
non
Granosolarium millegranum
(
Lamarck, 1822
)
].
Solarium millegranum
Lamarck, 1822
—Zelinskaya
et al.
1968: 133, pl. 34, figs 9–12 [
non
Granosolarium millegranum
(
Lamarck, 1822
)
].
semilaevis
(
Solarium
) Sacco, 1892—
Bieler & Petit 2005: 62
.
non
Solarium millegranum
Lam.
(?)—
Friedberg 1923: 414
, pl. 25, fig. 6 [=
Nipteraxis exmoniliferus
(Sacco, 1892)
].
non
Architectonica
(
Solariaxis
)
millegranum
Lamk.
—
Korobkov 1955
: plate captions, pl. 13, figs 19a–c [=
Niperaxis
exmoniliferus
(Sacco, 1892)
].
Type material.
Holotype
:
NHMW 1846
/0037/0428a, SL:
6.9 mm
, MD:
15.5 mm
, M̂llersdorf (
Austria
), illustrated in
Ĥrnes
(1856, pl. 46, figs 4a–c),
Figs 13C
1
–C
2
.
FIGURE 13 A
1
–A
3
.
Granosolarium semilaevis
(Sacco, 1892)
, NHMW 1846/0037/0428b, M̂llersdorf (Austria).
B
1
–B
3
.
Granosolarium semilaevis
(Sacco, 1892)
, NHMW 2013/0078/0113a, Baden (Austria).
C
1
–C
3
.
Granosolarium semilaevis
(Sacco, 1892)
, holotype, NHMW 1846/0037/0428a, M̂llersdorf (Austria).
D
1
–D
3
.
Granosolarium semilaevis
(Sacco, 1892)
, NHMW 2013/0078/0113b, Baden (Austria).
Illustrated material.
NHMW
1846/0037/0428b, SL:
4.3 mm
, MD:
11.7 mm
, M̂llersdorf (
Austria
),
Figs 13A
1
–A
2
.
NHMW
2013/0078/0113a, SL:
3.1 mm
, MD:
10.4 mm
, Baden (
Austria
),
Figs 13B
1
–B
2
.
NHMW
2013/0078/0113b, SL: 3.0 mm, MD:
9.8 mm
, Baden (
Austria
),
Figs 13D
1
–D
2
.
NHMW
1846/0037/0428d, SL:
3.7 mm
, MD:
10.3 mm
, M̂llersdorf (
Austria
),
Fig. 4K
.
Additional material.
1 spec.
NHMW 1846
/0037/0428c, M̂llersdorf (
Austria
)
.
Revised description.
Shell small, flattened, discoidal, periphery carinate, with flattened cyrtoconoid spire. Protoconch heterostrophic, large, of 1.2 visible whorls (diameter
1.2 mm
). Teleoconch of about 4.5 whorls. SSC, UPC and LPC narrow, beaded. Two or three beaded spiral cords become successively intercalated between peripheral cords; three to four beaded spiral cords appear on mid-field separated by delicately beaded spiral threads. LPC forming sharp crenulated carina, also serving as upper point of whorl attachment. Base weakly concave below carina; laterally three finely beaded spiral cords (including LPC) and up to five delicate beaded spiral threads intercalated; medially three more coarsely beaded spiral cords; UC fine, narrow, sunken into and overhanging umbilicus. Umbilicus very wide (~40–41% of total diameter). Umbilical wall bearing prosocline growth lines. Aperture small, rounded, sharply pointed at peripheral keel; CG and PG absent.
Discussion.
This species was considered conspecific with the Late Miocene to Pliocene (Proto-)Mediterranean
Granosolarium millegranum
(
Lamarck, 1822
)
by most authors. Only Sacco (1892) recognized that the specimen from the Middle Miocene of the
Vienna
Basin illustrated by Hörnes (1856) was not conspecific with
G. millegranum
and introduced the varietal name
semilaevis
for it.
Granosolarium millegranum
differs from
G. semilaevis
in its much larger size (max. diameter
17.5 mm
versus
10.4 mm
), more sharply carinate periphery, the narrower umbilicus, and the more reduced sculpture of beads on the spiral cords of the dorsal and ventral side (
e.g.
,
Cavallo & Repetto 1992: 152
, fig. 419;
Bogi
et al
. 2002: 35
, figs 21–22;
Chirli 2013: 12
, pl. 4, figs 4–9).
Paleoecology.
All Austrian specimens drive from clays of the Baden Formation, which formed in middle to outer neritic environments with up to
210 m
water depth (
Kranner
et al.
2021
).
Distribution.
Only known from the Langhian equivalent of the Badenian of the Central Paratethys Sea.
Central Paratethys Sea.
Middle Miocene (Badenian):
Alpine-Carpathian Foredeep
: Žabčice (
Czech Republic
) (Montanaro Gallitelli & Tacoli 1951);
Vienna
Basin
: Baden, M̂llersdorf (
Austria
) (Ĥrnes 1856);
Făget Basin
: Coşteiu de Sus, Lăpugiu de Sus (
Romania
) (Boettger 1907),
Bahna-Orşova Basin
: Racovăţ, Iloviţa (
Romania
) (
Marinescu 1961
).