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Classification


Geographic Distribution

Antarctic Convergence illustration Antarctic convergence

Bathymetric Specimen Dispersal

37 individual specimens found for Austropallene calmani.

Austropallene calmani Gordon  Species

Synonymy

Original Description
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Original Description
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AUSTROPALLENE CALMANI n. sp. Figs. 12a; 13a-c and 14a.

Sta. 90. 2 females (including holotype), 1 young.

Sta. 100. 1 female (incomplete).

Sta. 105. 1 ovigerous male (total length = 3.5 mm.)

Description of holotype: This female which measure 4.3 mm. in total length, resembles A. tibicina in general build although the lateral processes are more widely separated (fig. 12 a). The cephalic somite is equal to the sum of the two succeeding segments; the neck is of medium length and the large cephalic lobes each bear a sharply pointed spur. The ocular tubercle is low and wide, and the eyes are conspicuous. The lateral processes are rather more than twice as long as wide and are separated distally by intervals exceeding their own diameter, The first process has only one, each of the others has a pair of distal spurs; in some cases there is also a minute tubercle midway between the two spurs. The first lateral process on the left, the second on the right, side have undergone regeneration together with the respective walking legs. The proboscis is rather longer than the cephalic somite, of almost uniform diameter throughout the greater part of its length and bluntly conical at the apex (fig. 12 a). In lateral aspect the distal part curves slightly downwards. The abdomen is short, directed almost perpetually upwards.

The chelophores are robust and rather massive in proportion to the rest of the animal. The scape which is three times as long as wide, is narrowed proximally and bears 2-3 stout spines (fig. 12 a). The chela is rather shorter than the scape; the fingers are sharply pointed and the movable one fits into a cavity, bounded by a ventral lobe, some distance from the apex of the immovable one.

The walking legs are longer and more slender than those of A. tibicina (cf. figs. 13a and 12c). The spurs on the first coxa are longer than those of the lateral processes. The second coxa is four times as long as wide (maximum width near distal end), and bears two pairs of spinose projections on the proximal half. The femur is rather more than six times as long as wide, and there are 4-6 small dermal papillae on the ventral margin. The first tibia is ten times as long as wide, with 8-9 dermal papillae on the dorsal, and 4 minute ones on the ventral margin. The second tibia, the longest segment, is fourteen times as long as wide, with 8-9 dermal papillae on the dorsal margin. The tarsus is approximately one-sixth, the claw two-thirds of the propodus (fig. 13 a).

There are minute developing ova in the femur of each leg, but the specimen has apparently spawned previously and the femur has reached its maximum width. The female paratype, on the other hand, has scarcely reached sexual maturity for, although there are fairly large developing ova, the femur is more slender than in the holotype.

TABLE 3

Species

Austropallene brachyura

A. tibicina

A. calmani

A. gracilipes

Sex

Female

Male

Female (T.N. 338)+

Female paratype

Male holotype

Male young

Female holotype

Male paratype

Female paratype

Male holotype

Male paratype

Length in mm.

6.3

5.5

5.3

3.6

4.3

3.9

4.3

3.5

4.5

5

4.7

No. of leg measured

3

3

2

3

4

3

3

2

4

3

3

4

3 & 4

Length/breadth of : Second coxa

4

5

4.2

4

3.8

3

5.5

6

4

5.8

5.8

8

7.4

“ : Femur

7

11

7

6.8

6.8

5.5

8.5

12

6.4

8.8

11

15

14

“ : First tibia

9.5

9

8.3

8

7.8

7

7

11

10

7.5

15

18

13*

“ : Second tibia

14

14

11.8

11.8

12

10

12

16

14

12

22

-

20

+ “Terra Nova” Collection

* This segment is more expanded distally than in the holotype

The male is very similar to the female as regards the general build of the body. The walking legs are more slender proximally (see table 3) ; there are 10-12 minute dermal papillae on the ventral margin of the femur and 2-3 pairs of spines on the second coxa; the tibiae are rather stouter than those of the female (cf. fig. 13a and b). The oviger is represented in fig. 12 c; there are 10+9+9+9 special spinules on the terminal segments.

The immature specimen from Sta. 90 may safely be referred to this species since there is already one prominent spine on the scape of the chelophore, although the fingers have not as yet acquired the same shape as in the adult.

Remarks: This species can easily be distinguished from A. tibicina by several well-marked characters. (1) The proboscis is much less curved in lateral aspect and is contracted only near the apex (cf. fig. 12a and b). (2) The chelophores are much more robust, with spinose scape and the palm of the chela is higher than long; in A. tibicina the height is equal to the length, measured to the base of the movable finger. (3) The walking legs are less setose and those of the female are more slender (see table 3 and figs. 12 c and 13a), with fewer dermal papillae, especially in the femur.

Distribution: Off the Antarctic Continent, in the Gauss and Victoria Quadrants.” (Gordon 1944, p. 42-45)

Geographic Distribution

Off the Antarctic Continent, in the Gauss and Victoria Quadrants.

Specimens

Displaying 10 of 13 Specimens

Type Status Catalog No. Date Collected Location Coordinates Depth (m) Vessel
  233975 2/18/1956 Ross Sea 77.5° S, 166.5° E 320 Edisto R/V
  233976 2/19/1960 Ross Sea 77.7° S, 166.33° E 351 – 432 Eastwind R/V
  233977 3/6/1966 Scotia Sea 56.3° S, 27.5° W 148 – 201 Eltanin R/V
  233978 1/26/1968 Ross Sea 78.4° S, 173.1° W 473 – 475 Eltanin R/V
  233979 2/4/1968 Ross Sea 77° S, 166.7° W 408 – 415 Eltanin R/V
  233980 2/26/1968 South Pacific Ocean 49.6° S, 178.9° E   Eltanin R/V
  233981 5/14/1975 Scotia Sea 53.64° S, 38.02° W 130 – 133 Islas Orcadas R/V
  233982 2/16/1976 Scotia Sea 60.47° S, 46.45° W 115 – 132 Islas Orcadas R/V
  233983 2/16/1976 Scotia Sea 60.43° S, 46.42° W 97 – 128 Islas Orcadas R/V
  233984 2/22/1976 Scotia Sea 61.31° S, 44.39° W 278 – 285 Islas Orcadas R/V

Displaying 10 of 13 Specimens

View additional taxa  View all species collected at same locations as Austropallene calmani