78
R. K . DELL
including Graham Land and the South Shetland Islands-" Graham
Land ".
4. South Georgia, Shag Rocks and the South Sandwich Islands,
including Bouvet Island.
The number of species of isopods and tanaids occurring in each
zone together with their occurrence elsewhere in Antarctica can be seen
in Table 111.
TABLE I11
Number of apeciea of iaopoda
Common to
Pacific
Common
Common
Ocean
to Indian
to Grahrn
Total
Endemic
Sector
Sector
Land
Pacific Ocean
Sector
46
6
-
32
26
Indian Sector
103
47
32
-
31
Grahham Land
69
17
26
31
-
Kusakin stressed that the areas have been unevenly and inadequately studied. The large number of species recorded from the Indian
Sector is due to the fact that intensive collecting by the Gauss and the
Soviet investigators in one area has brought to light a whole range
especially of small species. The degree of endemism within this zone
may therefore only be apparent, not real.
Kusakin concluded that the species of the fauna from the Antarctic
Continent and the associated islands including South Georgia are much
more similar amongst themselves than they are to those of any other
area. He therefore believes that this fauna makes up a single Antarctic
fauna, but is prepared to consider South Georgia as " a kind of province
of the Antarctic region ". On the evidence available he also divides the
Antarctic continent into Ross and Davis districts with the boundaries
left uncertain. He also treats Graham Land, the South Shetlands and
South Orkneys as " a specific west Antarctic transitional province ".
The Antarctic fauna of 120 species is divided into seven elements,
divided on the basis of their distribution patterns.
1. An East Antarctic group, includes 62 species confined to the shelf
and the continental slope of the Antarctic continent, excluding Graham
Land. This is essentially a high Antarctic stenothermal group. Highly
characteristic are two species of Zenobianopsis and the monotypic
genera Echinomunna and Notoxenus. Eleven species of the family
R. K . DELL
including Graham Land and the South Shetland Islands-" Graham
Land ".
4. South Georgia, Shag Rocks and the South Sandwich Islands,
including Bouvet Island.
The number of species of isopods and tanaids occurring in each
zone together with their occurrence elsewhere in Antarctica can be seen
in Table 111.
TABLE I11
Number of apeciea of iaopoda
Common to
Pacific
Common
Common
Ocean
to Indian
to Grahrn
Total
Endemic
Sector
Sector
Land
Pacific Ocean
Sector
46
6
-
32
26
Indian Sector
103
47
32
-
31
Grahham Land
69
17
26
31
-
Kusakin stressed that the areas have been unevenly and inadequately studied. The large number of species recorded from the Indian
Sector is due to the fact that intensive collecting by the Gauss and the
Soviet investigators in one area has brought to light a whole range
especially of small species. The degree of endemism within this zone
may therefore only be apparent, not real.
Kusakin concluded that the species of the fauna from the Antarctic
Continent and the associated islands including South Georgia are much
more similar amongst themselves than they are to those of any other
area. He therefore believes that this fauna makes up a single Antarctic
fauna, but is prepared to consider South Georgia as " a kind of province
of the Antarctic region ". On the evidence available he also divides the
Antarctic continent into Ross and Davis districts with the boundaries
left uncertain. He also treats Graham Land, the South Shetlands and
South Orkneys as " a specific west Antarctic transitional province ".
The Antarctic fauna of 120 species is divided into seven elements,
divided on the basis of their distribution patterns.
1. An East Antarctic group, includes 62 species confined to the shelf
and the continental slope of the Antarctic continent, excluding Graham
Land. This is essentially a high Antarctic stenothermal group. Highly
characteristic are two species of Zenobianopsis and the monotypic
genera Echinomunna and Notoxenus. Eleven species of the family