Early Carboniferous Gastropoda from the Tamworth Belt, New South Wales, Australia
Author
Yoo, E. K.
text
Records of the Australian Museum
1994
1994-05-19
46
1
63
120
https://journals.australian.museum/yoo-1994-rec-aust-mus-461-63120/
journal article
10.3853/j.0067-1975.46.1994.18
b5d2a24f-697a-4fc3-9612-978fb532e815
0067-1975
4654599
Rhabdotocochlis turgida
n.sp.
PI. 11 figs 1-10
Dimensions. H |
W |
PA |
NW |
Holotype
(
F78425
) 5,4 mm
Paratype
(
F78426
)2.7
|
3.6 mm
2.2
|
60° 65 |
5 4Yz |
Description. Shell very small, medium-spired turbiniform, coeloconoid, narrowly phaneromphalous. Protoconch of 11,4 smooth whorls, and a rather flat apex. Teleoconch whorl profile gently arched between sutures, rounded on the final whorl, sutures moderately deep, spiral lirae rising gradually on the second whorl, then becoming gradually stronger; 18 lirae between sutures, shell consisting of two layers. Aperture with straight inner lip thickened, slightly reflexed; outer lip orthocline.
Types
.
Holotype
(
F62002
)
3 figured
paratypes
(
F78429
- 30) and 12 unfigured
paratypes
(
F78433
)
.
Type
locality.
1.8 km
east from the southern end of
Glenbawn Dam
wall,
13 km
north-east of
Aberdeen
, NSW (Locality 30)
.
Stratigraphic position. In bioclastic limestone, upper part of the Dangarfield Formation.
Additional material.
6 specimens
from south-east of 'Rangari' (Locality 18), and 10 from various horizons at Glenbawn (Locality 31).
Geographic distribution. 'Rangari' to Glenbawn.
Geological age. Middle to late Tournaisian.
Etymology. Derived from the Latin
turgidus
meaning swollen, referring to the inflated last whorl.
Remarks.
Rhabdotocochlis turgida
n.sp.
differs from
Araeonema microspirulata
in having a larger and thicker shell consisting of two layers, and coarser spiral lirae, and from the
type
species,
Rhabdotocochlis rugata
Knight
, in having the more inflated last whorl and finer spiral lirae.