70
R. K. DELL
area. No genera are endemic. Of the 38 endemic species 17 are confined south of 60%.
Existing records are too sparse to draw any proper conclusions.
Some shallow water species such as Cyclmpis gigas Zimmer, Leucon
antarctica Zimmer, Eudorella gracilior Zimmer, Diastylis helleri
Zimmer and Leptostylis crassicuuda Zimmer appear to be circumpolar
in distribution, E . gracilior and D . helleri extending as far north as
South Georgia.
Lomakina (1968) stressed that, although not many Antarctic species
had been recorded, the fauna was systematically varied. A large number
of the species (1 8) belong to genera which mainly live in cold water in
the Northern Hemisphere, e.g. Diastylis, Leptostylis, Leucon, Eudoretla,
Lamprops and Hemilamprops. The Pacific genus Diastylopsis which
does not occur in the Arctic is represented by two Antarctic species.
The genera Curnella and Campylaspis which are mainly warm water
genera have eight Antarctic species between them. The presence of the
two genera, Vawnthompsonia (with two species) and Cyclaspis (also two
species) of the warm water family Bodotriidae makes up an unexpected
element.
The high Antarctic (Antarctic Continent) species form a compact
isolated group with 14 endemic species, while the low Antarctic group
(South Georgia and Kerguelen) has 11 species found nowhere else.
Only seven species are found in both major areas.
Both Lomakina (1968) and Jones (1971) presented keys to the
Antarctic and Subantarctic cumaceans, and Lomakina gave distribution maps showing the known patterns for most species.
3. Ostracodu
On the whole the Ostracoda appear to be one of the neglected
Antarctic groups. No reports on the group have eventuated from many
of the Antarctic expeditions. Thus apart from a relatively minor paper
on forms from South Georgia, only two papers have appeared on the
benthic forms since 1919. Brady (1907) recorded the results of the
National Antarctic Expedition, 1901-04, Daday de Dees (1908, 1913)
those of the two French Antarctic expeditions, Mueller (1 908) those of
the German South Polar Expedition and Scott (1912) described the
collections of the Scottish National Antarctic Expedition. Chapman
(1916a, b, c) recorded species from two sets of raised deposits in the
Ross Sea, and from the sounding deposits obtained by the British
Antarctic Expedition, 1907-09 and (1919) the ostracods from the
Australasian Antarctic Expedition. There was then a long gap in
interest in the group until Benson (1964) contributed a paper on Ross
R. K. DELL
area. No genera are endemic. Of the 38 endemic species 17 are confined south of 60%.
Existing records are too sparse to draw any proper conclusions.
Some shallow water species such as Cyclmpis gigas Zimmer, Leucon
antarctica Zimmer, Eudorella gracilior Zimmer, Diastylis helleri
Zimmer and Leptostylis crassicuuda Zimmer appear to be circumpolar
in distribution, E . gracilior and D . helleri extending as far north as
South Georgia.
Lomakina (1968) stressed that, although not many Antarctic species
had been recorded, the fauna was systematically varied. A large number
of the species (1 8) belong to genera which mainly live in cold water in
the Northern Hemisphere, e.g. Diastylis, Leptostylis, Leucon, Eudoretla,
Lamprops and Hemilamprops. The Pacific genus Diastylopsis which
does not occur in the Arctic is represented by two Antarctic species.
The genera Curnella and Campylaspis which are mainly warm water
genera have eight Antarctic species between them. The presence of the
two genera, Vawnthompsonia (with two species) and Cyclaspis (also two
species) of the warm water family Bodotriidae makes up an unexpected
element.
The high Antarctic (Antarctic Continent) species form a compact
isolated group with 14 endemic species, while the low Antarctic group
(South Georgia and Kerguelen) has 11 species found nowhere else.
Only seven species are found in both major areas.
Both Lomakina (1968) and Jones (1971) presented keys to the
Antarctic and Subantarctic cumaceans, and Lomakina gave distribution maps showing the known patterns for most species.
3. Ostracodu
On the whole the Ostracoda appear to be one of the neglected
Antarctic groups. No reports on the group have eventuated from many
of the Antarctic expeditions. Thus apart from a relatively minor paper
on forms from South Georgia, only two papers have appeared on the
benthic forms since 1919. Brady (1907) recorded the results of the
National Antarctic Expedition, 1901-04, Daday de Dees (1908, 1913)
those of the two French Antarctic expeditions, Mueller (1 908) those of
the German South Polar Expedition and Scott (1912) described the
collections of the Scottish National Antarctic Expedition. Chapman
(1916a, b, c) recorded species from two sets of raised deposits in the
Ross Sea, and from the sounding deposits obtained by the British
Antarctic Expedition, 1907-09 and (1919) the ostracods from the
Australasian Antarctic Expedition. There was then a long gap in
interest in the group until Benson (1964) contributed a paper on Ross