Electronic Supplement 1
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Organisms
Diversity & Evolution 5 (2005) Electronic Supplement 1 |
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Angelika Brandt, Nils Brenke, Hans-Georg Andres, Saskia Brix,
Jürgen Guerrero-Kommritz, Ute Mühlenhardt-Siegel, Johann-Wolfgang
Wägele:
Diversity of peracarid crustaceans (Malacostraca) from the
abyssal plain of the Angola Basin
print version: Org. Divers. Evol. 5(S1): 105-112. 2005 (full
article)
electr. suppl.: Taxa list. pdf-format, 265
KB
Abstract:
During the expedition DIVA-1 (DIVersity of the
abyssal Atlantic benthos) with RV Meteor in July 2000, samples were
taken at seven stations by means of an epibenthic sledge north of the Walvis
Ridge in the Angola Basin off Namibia in 5125-5415 m depth. 241 species of
Peracarida are identified from the material so far. Dominant elements of the
peracarid fauna were Isopoda, which were most abundant and diverse, 100 species
were identified from 1326 individuals, followed by Tanaidacea with 50 species
and 194 individuals, and Cumacea with 45 species and 479 individuals. Amphipoda
were less frequent with 39 species and 150 individuals, Mysidacea were rarest
yielding only 7 species and 34 individuals. The fauna is characterized by 118
rare species, most of them occurring only with single specimens at one station.
Only 123 species occur at more than one station and only two species of the
Eurycopinae (Isopoda) at all stations. The few species which are already known
are either cosmopolitan or typical for the Atlantic Ocean, while elements known
from the Southern Ocean are rare indicating that the Walvis Ridge is an
effective distribution barrier for deep-sea organisms.
Key words: Crustacea; Peracarida; diversity; South Atlantic; Angola Basin; deep sea
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