New species and new records of scaphopods from New Caledonia
Author
Scarabino, Victor
John T. Huber
text
Mémoires du Muséum national d'Histoire naturelle
2008
196
215
268
journal article
978-2-85653-614-8
1243-4442
Gadila vanuatuensis
n. sp.
Fig. 3h
TYPE MATERIAL. —
Holotype
(dd)
MNHN 20149
and
8 paratypes
(dd)
MNHN 20150-20151
.
TYPE
LOCALITY. —
Vanuatu
,
16°16’S
,
167°21’E
,
360-419 m
[MUSORSTOM 8: stn DW 1065]
.
MATERIAL EXAMINED. —
New Caledonia
proper
. BATHUS 4: stn DW 882,
Passe de St Vincent
,
22°02’S
,
165°56’E
,
250- 350 m
, 1 dd (
paratype
MNHN 20151
)
.
Vanuatu
. MUSORSTOM 8: stn DW 1065, Malekula Island,
16°16’S
,
167°21’E
,
360-419 m
, 8 dd (
holotype
MNHN
20149 and
7 paratypes
MNHN
20150).
DISTRIBUTION. —
Vanuatu
and
New Caledonia
, shells in
350-360 m
.
DESCRIPTION. — Shell up to
13 mm
long, regularly curved on both ventral and dorsal sides until close to the oral aperture, from where the diameter decreases towards the mouth. Translucent grey to shiny white. Maximum diameter near oral aperture. Apex slightly dorsoventrally depressed, with 5 slight lobes, ventral one the largest, with denticle in the middle. Lumen circular. Mouth circular, oblique.
Measurements of
holotype
: L 13, W 1.9, mouth 1.3-1.2, w 0.6-0.5, arc 1.2.
REMARKS. —
Gadila vanatuensis
is characterised mainly by the regularity of curvature and the position of the maximum diameter, close to the oral aperture. As in most of the large species of the genus, a denticle is present in the ventral apical lobe. The value of this character should be studied more closely.
ETYMOLOGY. —
From
Vanuatu
, the
type
locality
.
Family
INCERTAE SEDIS
Genus and species undetermined Fig. 4n
MATERIAL EXAMINED. —
South
of
New Caledonia
.
BATHUS 2: stn DW 715, south of
Ile des Pins
,
22°39.42’S
,
167°10.99’E
,
202-227 m
, 3 dd
.
REMARKS. — These three
5 mm
long specimens are typically gadilid-like shells, but with quite different apical structures, that is, dorsoventral compresssion, broad walls and a dorsal notch. The notch could indicate that they are juvenile shells with the remains of the larval shell, but the thick apical walls make this seem unlikely. If the gadilid-like shape is considered significant, the apical structure is new for the order, although the compressed section matches the genus
Compressidens
. I prefer to wait for live specimens in order to describe this species and clarify its status from radular studies.