The Caecidae from BIOMAGLO Expedition in the Mayotte-Glorieuses area (Mollusca, Gastropoda)
Author
Vannozzi, Angelo
Via M. L. Longo, 8 I- 00151 Rome (Italy)
ang.vannozzi@gmail.com
text
Zoosystema
2023
2023-07-17
45
12
421
434
journal article
10.5252/zoosystema2023v45a12
1638-9387
8177458
5EB87A24-068B-40F3-B76B-79E4F48C478A
Caecum succineum
de
Folin, 1880
(
Fig. 2D
)
Caecum succineum
de
Folin, 1880: 810
. —
Vannozzi 2019b: 86
and synonymy therein.
TYPE
MATERIAL
. —
Lectotype
.
Australia
• dd;
Queensland
,
Cape York
,
Flinders Passage
,
12.5 m
depth
;
NHMUK 1887.2.9.2344
selected by
Pizzini
et al.
(2013
: fig. 11R).
Paralectotypes
.
Australia
• several dd; same data as for holotype;
NHMUK
.
TYPE
LOCALITY
. — Pacific Ocean, NE
Australia
,
Queensland
, Cape York, Flinders Passage,
12.5 m
depth.
MATERIAL EXAMINED. —
Îles Éparses
• 1 dd;
Mozambique
Channel, Glorieuses, BIOMAGLO
Stn DW
4807;
11°30’S
,
47°28’E
;
97-124 m
depth
;
25.I.2017
;
MNHN
.
Mayotte
• 1 dd; Mozambique
Channel, W
Mayotte, BIOMAGLO
Stn DW
4854;
12°56’S
,
44°58’E
;
455-465 m
depth
;
04.II.2017
;
MNHN
•
1 dd cf; Mozambique
Channel, SE
Mayotte, BIOMAGLO
Stn DW
4864;
12°56’S
,
45°15’E
;
455-487 m
depth
;
07.II.2017
;
MNHN
.
Comoros
• 1 dd;
Mozambique Channel, SE
Moheli
, BIOMAGLO
Stn DW
4836;
12°25.2’S
,
43°55.9’E
;
82-88 m
depth
;
28.I.2017
;
MNHN
.
FIG
. 2. — Side and ventral views of
Caecum
Fleming, 1813 species
from BIOMAGLO Expedition:
A -C
,
C. sepimentum
de
Folin, 1868
from Stn DW4848;
A
,
B
, specimens with preserved colour pattern;
C
, juv.;
D
,
C. succineum
de
Folin, 1880
from Stn DW4854;
E -H
,
C. iricolor
n. sp.
;
E
,
F
, holotype MNHN- IM-2000-38696, length 2.33 mm;
G
,
H
, paratype MNHN-IM-2000-38697 from type locality;
I -M
,
C. biomaglo
n. sp.
;
I
,
J
, holotype MNHN-IM-2000-38700, length 2.46 mm;
K
,
L
, paratype MNHN-IM-2000-38701 from type locality;
M
, paratype from Stn DW4854 MNHN-IM-2000-38702;
N
,
Caecum
sp.
from Stn DW4847, length 2.4 mm. Scale bar: 1 mm.
DISTRIBUTION
. — Indo-West Pacific, from the east coast of Africa (Red Sea to eastern
South Africa
) to
Papua New Guinea
,
Philippines
,
New Caledonia
(
Pizzini
et al.
2013
;
Vannozzi
et al.
2015
;
Vannozzi 2017
,
2019b
;
Blatterer 2019
).
DIAGNOSIS
. — Shell small for the genus.Tube subcylindrical, smooth, showing some rings toward the aperture. Macula absent. Aperture preceded by a slight swelling. Septum very low dome shaped without mucro, sometimes encrusted. Length
1.5 mm
.
REMARKS
This small species shows a very constant morphology, including a very low septum without mucro and a small swelling before the aperture preceded by some distinct rings.