“Pareuthria plicatula THIELE, 1912
(Figs. 123A-D)
Pareuthria plicatula THIELE, 1912, p. 212, pl. 13, fig. 24, pl. 16, fig. 22; POWELL, 1958, p. 192 (distribution record); POWELL, 1960, p. 148 (name only); EGOROVA, 1982, p. 40, fig. 170; DELL, 1990, p. 170, fig. 303.
Pareuthria cf. plicatula: HAIN, 1990, p. 55, pl. 5, fig. 3, pl. 22, fig. 8.
Material examined: 2 living specimens and 4 empty shells from St. 7; 5 living specimens and 19 empty shells from St. 8; 7 living specimens and 13 empty shells from St. 9.
Description: The shell is rather turreted, small, thin, translucently white in color, with a highly elevated spire (Figs. 123A, B). The protoconch is large, roundly inflated, about 2.2 in number of turns, 1.0 mm in height, 1.0 mm in diameter, translucent white in color, with crowded, very fine spiral lirae on the surface (Fig. 123C). The surface has very thin and translucent periostracum. The suture is constricted. The teleoconch is about 3.3 in
Table 22. Measurements and condition of Pareuthria plicatula THIELE.
No.
1
2
3
4
5
6
7
8
9
10
St.
7
7
7
7
7
7
8
8
8
8
SL (mm)
5.0
5.6
6.0
6.7
4.9
-
2.8
3.5
3.6
3.6
SW (mm)
2.5
2.7
2.8
3.1
-
-
1.5
1.8
1.7
1.8
SW/SL (%)
50.0
48.2
46.7
46.3
-
-
53.6
51.4
47.2
50.0
Condition
F
L
F
L
E
E
F
L
L
F
No.
11
12
13
14
15
16
17
18
19
20
St.
8
8
8
8
8
8
8
8
8
8
SL (mm)
4.5
4.7
4.8
4.8
5.0
5.0
5.2
5.2
5.5
5.5
SW(mm)
2.3
2.3
2.3
2.4
2.3
2.4
-
2.4
2.5
2.5
SW/SL (%)
51.1
48.9
47.9
50.0
46.0
48.0
-
46.2
45.5
45.5
Condition
L
L
F
F
F
F
E
F
F
F
No.
21
22
23
24
25
26
27
28
29
30
St.
8
8
8
8
8
8
8
8
8
8
SL(mm)
5.6
5.7
6.0
6.0
6.5
6.5
7.0
7.5
-
-
SW (mm)
2.7
2.5
2.5
2.7
2.7
2.8
3.0
3.2
-
-
SW/SL (%)
48.2
43.9
41.7
45.0
41.5
43.1
42.9
42.7
-
-
Condition
F
F
F
F
L
F
F
E
E
E
No.
31
32
33
34
35
36
37
38
39
40
St.
9
9
9
9
9
9
9
9
9
9
SL (mm)
3.5
4.9
5.0
5.1
5.2
5.2
5.4
5.6
5.6
5.7
SW (mm)
1.8
2.5
2.5
2.5
2.3
2.5
2.6
2.7
2.9
-
SW/SL (%)
51.4
51.0
50.0
49.0
44.3
48.1
48.1
48.2
51.8
-
Condition
F
L
F
F
F
F
F
L
L
E
No.
41
42
43
44
45
46
47
48
49
50
St.
9
9
9
9
9
9
9
9
9
9
SL (mm)
6.0
6.5
6.5
6.5
6.5
6.5
6.7
6.7
6.8
-
SW (mm)
2.7
2.7
3.0
3.0
3.1
-
3.0
3.3
2.8
-
SW/SL (%)
45.0
41.5
46.2
46.2
47.7
-
44.8
49.3
41.2
-
Condition
F
F
F
L
F
E
L
L
L
E
E: Empty and water-worn specimen; F: Freshly dead specimen; L: Specimen taken alive.
number of turns, slightly inflated, with almost regularly interspaced, low and narrow axial riblets accompanying very fine growth lines in between. The first teleoconch whorl has 23 axial riblets, and the penultimate whorl has 39. The body whorl is slightly inflated, moderate in size and rather narrow, with height being about 3/5 of shell length, breadth about 1/2 of shell length, and has about 40 axial riblets which tend to become weaker abapically. The base is slightly constricted. The aperture is small, length is about half the shell length, oval with a thin, smooth, sharply edged outer lip. The inner lip is smooth, and gently curved adaxially. The columellar lip is short and almost straight. A glossy, thin and smooth callus is deposited on the inner and columellar lips. The anterior siphonal canal is open and short, and is slightly curved backwards. The inner wall has a smooth surface.
The operculum is small for the aperture in size, with length being 68% of aperture length, corneous, translucent yellow in color, elliptical with low situated nucleus.
The radula is rachiglossate, 1 : 1 : 1 with about 80 transverse rows of teeth, translucent pale yellow in color, long but very narrow (1.25 mm in length, 0.10 mm in width; 6.7 mm in SL) (Fig. 123D). The rhachidian tooth is small, with squarish base, and has almost straight basal margin and a large and sharply pointed cusp on the top. The cusp is cuneate and slender, and has a pair of small denticles on both sides. The lateral teeth are large and stout, and the width of the base is about 1.2 times the rhachidian base. A single tooth has two strong, sharply pointed, and strongly incurved cusps that are situated considerably apart from each other and a short inner basal projection. The outer cusp is remarkably larger and stronger than the inner one.
Measurements: See Table 22.
Previous distribution records (Fig. 124): Type locality: Gauss Station, Davis Sea.
Range: off Enderby Land, 193-300 m (POWELL, 1958): eastern Weddell Sea, 181-481 m (HAIN, 1990); Budd Coast, 155-326 m (DELL, 1990); Ross Sea, 110-549 m (DELL, 1990).
Remarks: HAIN (1990) reported Pareuthria cf. plicatula from the eastern Weddell Sea. HAIN'S illustration has finer axial sculptures on the surface. The SEM photograph of the radula demonstrates that his specimens are P. plicatula.”
(Numanami, 1996: 181-184)
Pareuthria plicatula is a species of sea snail, a marine gastropod mollusk in the family Cominellidae.[1]
Pareuthria plicatula is a species of sea snail, a marine gastropod mollusk in the family Cominellidae.
Pareuthria plicatula is een slakkensoort uit de familie van de Buccinidae.[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1912 door Thiele.
Bronnen, noten en/of referenties
Pareuthria plicatula là một loài ốc biển, là động vật thân mềm chân bụng sống ở biển trong họ Buccinidae.[1]
Bài viết liên quan tới họ ốc biển Buccinidae này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. Pareuthria plicatula là một loài ốc biển, là động vật thân mềm chân bụng sống ở biển trong họ Buccinidae.
