Research on the mosquitoes of Angola - Systematic Catalog of ...

RIBgIRO, H. & RAMOS, H. Cunha -- <strong>Research</strong> ott the mosquitoes of Angola X
divisions: while form A is associated with the SW Arid biome (East
and South African Subregion of Chapin), form B is to be found in the
Southern Congo Savanna Zone (West African Subregion). This allopatry
of forms A and B of C. ximpxoni emphasize the taxonomic significance
of the morphological differences found in the larvae and strongly suggests
a subspecific treatment of both aimpsoni populations.
BIOECOI.,OGICAL NOTES. 85 breeding places of (7. simpsoni were recorded:
19 pools in river beds, 18 rock-pools, 13 shallow earth wells, 10
pools at river edges, 9 borrow-pits, 6 cement tanks and their efluents, 5
river margins, 2 ponds, an earth drain, a salt-marsh and a hot saline spring.
These larval biotopes were usually unshaded and often without any macroscopic
vegetation. The breeding water was usually clean fresh water,
with a pH (measured in 51 biotopes) ranging from 5.4 to 10.0 (mean 6.4).
The salt content of the breeding water, determined in 61 out of the 85
simpsoni larval biotopes, ranged from 0.1 to 23.4 (mean 2.6) g/l (NaCl),
which points to the remarkable tolerance of larval simpsoni to chlorides,
already shown in Lobito (34). Larvae of C. ximpsoni seem to be also
adapted to relatively high temperatures. Breeding water temperatures of
29øC and 31øC were recorded by the writers, as well as breeding in a
hot spring at a certainly higher temperature (unfortunately not measured).
In 11 out of the 85 simpsoni larval biotopes no other mosquito
larvae were found. In the remainder 74 breeding sites larvae of 16
species of Culex, 13 Anopheles, 5 Aedes, 2 Ficalbia and 2 Uranotaenia
were found as associates of C. simpsoni. The following were associated
species, by decreasing order of frequency: Anopheles listeri (28 times),
Culex univittatus (17), An. gambiae (15), An. pretoriensix (13), C. ethiopicus
(10), An. rufipes rufipes (8), An. coustani, An. rhodesiensis rhodesiensis
and C. tigripes (6 each), An. azevedoi, An. ziemanni, C. thalassius,
A edes natronius and Uranotaenia fusca (4 each), A e. vittatus,
C. antennatus, C. decens, C. pipiens pipiens and C. theileri (3), Ae.
durbanensis angolae, An. longipalpis, An. squamosus, C. annulioris,
C. pipiens quinque/asciatus and C. poicilipes (twice) and only once,
Ae. aegypti, Ae. irritans, An. demeilloni, An. nili Congo form, C. antennatus,
C. aurantapex }iniaensis, C. argenteopunctatus kingi, C. cinerellus,
C. ethiopicus, C. inconspicuosus, C. perfidiosus, C. tritaeniorhynchus,
Ficalbia malfeyti, F. mimomyiaformis and U. bal/ouri. Figs. 5
and 10 show two larval biotopes of C. simpsoni form A.
Estud., Ens. e Doc.- 134 105