Seven new genera and thirty-four new species of buccinoid gastropods (Neogastropoda: Buccinidae) from the Aleutian Islands, Alaska
Author
Mclean, James H.
Author
Clark, Roger N.
text
Zootaxa
2023
2023-09-26
5351
2
151
201
http://dx.doi.org/10.11646/zootaxa.5351.2.1
journal article
270509
10.11646/zootaxa.5351.2.1
b3b05d51-3aeb-49c7-bbc1-0365bc92c886
1175-5326
8391375
F34F6B3C-F251-4D8E-B002-A96BD70CA1BE
Aleutijapelion aleuticus
(Dall, 1895)
Figures 6 B–E
Beringius aleuticus
Dall, 1895:711
, pl. 29, fig. 2.
Type locality:
Amutka Pass,
Aleutian Is.
,
Alaska
(
52°15.00 N
,
171°40.00 W
),
454 m
(R/
V
Albatross
Station
# 3481).
Type material:
Holotype
,
USNM 106999
,
66 mm
.
FIGURE 6. A
.
Metajapelion adelphicus
(Dall, 1907) RNC
4967, Off Okinoshima Island, Japan, 182 m, 97.4 mm;
B–E
.
Aleutijapelion aleuticus
(Dall, 1895)
;
B
. Holotype, USNM 106999, Amutka Pass, 454 m, 65.0 mm;
C
. RNC 4772, S of Umnak Island, 86 m, 74.3 mm;
D
. Operculum of RNC 4772, 28 mm;
E
. Radula, RNC 4880, W of Carlisle Island, 228 m, bar = 100 µm;
F–H
.
Aleutijapelion mirandus
;
F
. Holotype, LACM 3664, N of Amlia Island, 423 m, 74.4 mm;
G
. RNC 5019, E of Kiska Island, 268 m, 91.7 mm;
H
. Radula, RNC 4639, S of Atka Island, 207 m, bar = 200 µm.
Referred material:
LACM 181446
,
1 sp.
,
73.2 mm
. S of
Kodiak Island
,
118 m
;
RNC 4631
,
1 sp.
,
72.16 mm
. S of
Kodiak Island
(
56°29.85 N
,
152°30.06 W
),
297 m
(
NMFS 57-200101
-
146
)
;
LACM 181447
,
1 sp.
,
50.5 mm
.
ESE of Chirikov Island
, SW of
Kodiak Id.
,
122 m
;
CASIZ 149898
,
67.4 mm
.
Samalga Pass
,
Islands of Four Mountains
(
52º55.8 N
,
169º20.4 W
),
401 m
(
NMFS 23-200001
-
33
)
;
RNC 4611
,
1 sp.
,
66.4 mm
.
Shumagin Is.
,
SE of
Alaska
Peninsula
(
54°41.13 N
,
158°00.15 W
),
440 m
(
NMFS 57-200101
-
92
)
;
RNC 4646
,
1 sp.
,
59.5 mm
.
Shumagin Is.
,
Shumagin Is.
,
SE of
Alaska
Peninsula
(
54°30.70 N
,
158°52.02 W
),
361 m
(
NMFS 159-200901
-
73
)
;
RNC 4705
,
1 sp.
,
81.5 mm
. S of
Unalaska Island
,
Fox Ids.
(
53°06.2 N
,
166°58.66 W
),
294 m
(
NMFS 57-200101
-
8
)
;
RNC 4772
,
1 sp.
,
74.34 mm
. S of
Umnak Id.
,
Fox Ids.
(
53°27.12 N
,
168°29.93 W
),
86 m
(
NMFS 143-200601
-
23
)
;
RNC 4880
,
1 sp.
,
63.25 mm
. W of
Carlisle Island
,
Islands of Four Mountains
(
52°55.86 N
,
170°24.58 W
),
228 m
(
NMFS 143- 200601
-
29
)
;
RNC 4881
,
1 sp.
,
80.14 mm
. S of
Yunaska Island
,
Islands of Four Mountains
(
52°31.75 N
,
170°33.55 W
),
220 m
(
NMFS 143-200601
-
40
)
;
RNC 4689
,
1 sp.
,
78.9 mm
. W of
Tanaga Island
,
Andreanof Ids.
(
51°39.68 N
,
178°25.57 W
),
373 m
(
NMFS 143-201201
-
125
)
.
Description:
Relatively large shells (largest examined
81 mm
, RNC 4705); whorls rounded; periostracum thin, adherent, olive green to brown, shiny, not flaking in dry shells; color pattern two-tone, lighter on sharply defined basal area. protoconch with 2.5 whorls extended (but not nearly as much as in
Beringius
), scarcely if at all increasing in size; seven or eight teleconch whorls; axial lacking (except for growth lines), spiral sculpture absent, or if present, consisting of a few low, faint, irregular cords, or faint oblique ridges on upper part of whorl; siphonal canal short, base deeply notched near pillar; anterior lip extending below anterior tip of pillar. Lip of mature shell thickened and slightly flaring; lip continuous across anal sinus, connecting to narrow parietal shield in mature shells. Operculum (fig. 6 D) large, nearly filling aperture, narrowing anteriorly, concave on exterior surface.
Radula: (fig. 12 E) Typical of this subfamily. Rachidian tooth reduced to a simple, chevron shaped, acuspate plate. Lateral teeth rather narrow, tricuspid, the outer cusp long curved, inner two cusps much smaller.
Distribution:
Western Gulf of
Alaska
, S of Kodiak Island (
152°29 W
) to central Aleutian Islands, west to Tanaga Pass, Andreanof Ids. (
178°25 W
), at depths of
86–
454 m
.
Habitat:
Black sand and gravel or muddy sand and gravel with pebbles. Water temperatures of 3.7–5.0°C.
Remarks:
This species differs from
Aleutijapelion mirandus
n. sp.
in having a broader profile, and in lacking the narrow, channeled shoulder Also resembles
Boreancistrolepis excelsus
(see remarks under that species).