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
Fissidentalium transversostriatum
(
Boissevain, 1906
)
Dentalium transversostriatum
Boissevain, 1906: 32
, pl. 4, fig. 23.
Other reference:
Fissidentalium shoplandi
- Scarabino 1995: 248, fig. 55 (in part), 73a-b (
non
F. shoplandi
Jousseaume, 1894
). Material cited: 1 lot (2 spms) fom Loyalty Ridge,
594 m
, shells only.
NEW MATERIAL EXAMINED. —
New Caledonia
proper
. BATHUS 1: stn DE 697,
Passe
de Hienghène
,
20°34’S
,
164°58’E
,
570- 650 m
, 1 dd
. —
BATHUS 4: stn CP 948,
Passe
de Hienghène
,
20°33’S
,
164°57’E
,
533-610 m
, 1 dd
.
DISTRIBUTION. — Global distribution:
Indonesia
,
Philippines
, live in
550-1030 m
,
New Caledonia
. Distribution in
the New Caledonian region: east of
New Caledonia
and Loyalty Ridge, shells in
570-
610 m
.
REMARKS. — Based on the material available at the time (
Indonesia
,
Philippines
and
New Caledonia
), including the
type
specimens, Scarabino (1995) considered
Fissidentalium transversostriatum
to be a junior synonym of
F. shoplandi
(Jousseaume, 1894)
. Since then, examination of a series of specimens of
F. shoplandi
from the western Indian Ocean has revealed enough differences to revalidate
F. transversotriatum
. The examined material of
F. shoplandi
includes: near Aden, 670 fms (USNM 107709), off Travancore coast, 360 fms (BMNH 1904.6.15.175-176), and specimens collected by the
John Murray Expedition
to the western Indian Ocean (BMNH 1952.3.25.167-171; 1952.3.25.157-166 and 1952.3.25.182-191) from depths of
533-1080 m
(
Ludbrook 1954
).
The main difference between
Fissidentalium transversostriatum
and
F. shoplandi
is in rib sculpture, and is especially clear in adult and well preserved specimens. Both species have dense transverse sculpture but while
F. shoplandi
has smooth cords scattered among threads crenulating the ribs,
F. transversostriatum
has regular elevated striae, which become scales and almost spinulose (Scarabino 1995: fig 73b), resembling the
Coccodentalium
sculpture
type
.