The extinct Nerineoidea and Acteonelloidea (Heterobranchia, Gastropoda): a palaeobiological approach
Author
Kollmann, Heinz A.
text
Geodiversitas
2014
2014-09-26
36
3
349
383
http://dx.doi.org/10.5252/g2014n3a2
journal article
6397
10.5252/g2014n3a2
5dd903f5-b398-4a17-83e5-364766291411
1638-9395
4538503
Subfamily
CRYPTOPLOCINAE
Pchelintsev, 1960
(
Fig. 3
C-E, H)
Cryptoplocusidae
Pchelintsev, 1965: 69
.
FIG. 4. —
Nerinellidae
and
Eunerineidae
n. fam.
:
A -C
,
Nerinella grossouvrei
Cossmann, 1896
, Hettangian, Simon-la-Vineuse (Vendée, France);
A
, lectotype, with complete broad basal notch, MNHN.F.R00179;
B
, shell partly removed showing the internal plaits, MNHN.F.A49006;
C
, shell with moderately concave whorls, MNHN.F.A51317;
D
,
Nerinella danusensis
d’Orbigny, 1852
, figure from
Cossmann 1896
, Oxfordian, Châtel-Censoir (Yonne, France), MNHN.F.R50376;
E
,
Nerinella elatior
(d’Orbigny, 1850)
, internal mould, figure from
Cossmann 1896
,Oxfordian,La Rochelle (Charente Maritime,France),MNHN.F.
J08541
;
F
,
G
,
Aptyxiella flexuosa
(Sowerby, 1831)
,Late Cretaceous, Russbach (Salzburg,Austria);
F
, NHMW 2013/0265/0002;
G
, axial section, NHMW 2013/0265/0001;
H
, Neri
nella arduensis
(Buvignier,1852),
Middle Bathonian,Martigny,La-Fosse-aux-Conains (
Aisne
,
France
),
MNHN
.F.R00036
;
I
,
J
,
Eunerinea piettei
(
Fischer,1969
)
,
Bathonian
,
Rumigny
(
Ardennes
,
France
),
holotype
MNHN
.F.R00289
;
K
,
Eunerinea bathonica
(Rigaux & Sauvage, 1869)
,Bathonian,Rumigny (
Ardennes
,
France
),
MNHN
.F.A49003
;
L
,
Eunerinea baillei
(Maire,1913)
,Oxfordian,
La Mouille
(
Haute-Saône
,
France
),
MNHN
.F.A26139
;
M
,
Eunerinea defrancei
(Deshayes, 1833)
, figure from d’Orbigny 1850, Oxfordian, Chatel-Censoir (
Yonne
,
France
),
MNHN
.F.B12681. Scale bars: A, E, F,
5 mm
; D,
2,5 mm
; B, C, G-M,
10 mm
.
TYPE
GENUS. —
Cryptoplocus
Pictet & Campiche, 1861
(
1861: 257
)
.
TYPE
SPECIES. —
Nerinea depressa
Voltz, 1836
(
1836:540
)
.
SUBFAMILY
CHARACTERS
. — Shells broad coniform to turriculate. Whorls moderately high, flat to strongly concave, broadly rhombic or quadrangular in cross section, columellar and basal lip describing right angle. Periphery of last whorl rounded, base moderately convex, broadly umbilicate. Umbilicus surrounded by a siphonal fasciole. One parietal plait extends diagonally into the whorl interior in
Cryptoplocus
Pictet & Campiche, 1861
and the synonymous
Conoplocus
Pchelintsev, 1965
.
Wieczorek (1979)
mentions an additional columellar plait in early whorls, and a columellar and a palatal plait in
Trochalia
Sharpe, 1850
.
REMARKS
This diverse group is allocated to the
Ptygmatididae
because of its siphonal aureole around the umbilicus. Besides the dominant parietal plait, columellar plaits in variable numbers may occur.