A revision of the Australian fossil species of Zoila (Gastropoda: Cypraeidae)
Author
Darragh, Thomas A.
text
Memoirs of Museum Victoria
2011
2011-12-31
68
1
28
https://museumsvictoria.com.au/collections-research/journals/memoirs-of-museum-victoria/volume-68-2011/pages-1-28/
journal article
10.24199/j.mmv.2011.68.01
1447-2554
10665999
Zoila glomerabilis
sp. nov.
Figures 6F–H
,
7A–F
| L |
W |
H |
LT |
CT |
| Holotype P14515 |
96 |
59 |
52 |
35 |
30 |
| Paratype P308740 |
85 |
52 |
40 |
35 |
26 |
| Paratype P315526 |
80 |
50 |
42 |
33 |
13 |
Description
. Shell of large size for genus, solid, globosely pyriform, abruptly contracted anteriorly to short, narrow anterior canal. Spire projecting slightly, almost entirely enveloped by last whorl, covered with thick callus. Posterior canal short, deeply incised, reflexed to the left. Anterior canal deeply incised, with rounded sides, reflexed dorsally, supported laterally by very short, narrow flanges. Aperture sinuous, slightly widened and sloping steeply inwards before anterior canal. Outer lip with 28–36 teeth extending along entire lip; inner lip with 15–32 teeth extending along entire lip on most specimens; weaker posteriorly on some specimens and on few specimens extending only along half of lip. Fossula well developed, broad, relatively deeply depressed, bounded anteriorly by weak terminal ridge.
Dimensions
.
Type locality
.
Lower
beds of section south of
Fishermen’s Steps
,
Bird Rock Cliffs
,
Torquay
,
Victoria
. Jan Juc Formation.
Type material
.
Holotype
P14515,
F.A. Cudmore
collection;
paratype
P308740, presented
S. F. Colliver
,
16 January 1962
;
paratype
P315526, presented
C. Goudey
, 2009.
Figure 5. A, D–G, I–K,
Zoila chathamensis
; A, E, I, holotype, AIM 71325, Flower Pot Harbour, Chatham Islands; A, E, × 1.5; I, × 2; D, F–G, J–K, GNS TM8792, Taruwhenua Peninsula, Chatham Islands; D, F–G, K, × 1.5; J, × 2; B–C, H, L,
Z. viathomsoni
; B–C, H, holotype, WAM 72.296, Thomson Highway, Western Australia; L, fossula, P310194, Thomson Highway, × 3.
Time range
. Janjukian, Late Oligocene–Longfordian, Early Miocene.
Occurrence and material
.
Janjukian
:
Jan Juc Formation. At
sea level, Bird Rock,
Torquay
(P304422,
one specimen
)
;
Half Moon Bay
,
Torquay
(P315526,
one specimen
)
;
Torquay
(P308706, P304432, P304423,
seven specimens
)
;
Geological Survey
of
Victoria
locality
Ad
22, Bird Rock,
Torquay
(P308717,
one specimen
)
.
Longfordian: Fishing Point Marl. ‘Picnic bed’, Horden Vale (P308741-2,
two specimens
).
Remarks
. This species is very similar in morphology to
Z. dolichorhyncha
sp. nov.
but differs in that it is more globose, has a shorter anterior canal and tapers more abruptly towards the anterior.
Zoila glomerabilis
bears some resemblance to
Z. venusta
(Sowerby)
, Recent,
Western Australia
, but is more globose and has a prominent anterior canal lacking in
Z. venusta
. The fossula is very similar to that in
Z. venusta
, but not quite as elongate.
Figure 6. A–E, I,
Zoila didymorhyncha
; A–C, paratype, P302685, PL3022, × 1; D–E, I, holotype, P302687, PL 3022, × 1; F–H,
Z. glomerabilis
, paratype, P315526, Half Moon Bay, Torquay, × 1.
Etymology
. Latin, glomerabilis, round.