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

RIBgIRO, H. & RAM08, H. Cunha -- <strong>Research</strong> on the mosquitoes of Angola X
7.4.3--Culex (Culiciomyia) nebulosus Theobald, 1901
The only known previous record of C. nebutosus in Angola is
that by Colago (9), from a treehole at Sambo.
MATERIAL EXAMINED. CABINDA, 3 larvae, 14.IV.1971; CAFIMA, 4 lar-
vae, 20.IV. 1972; CUANGAR, 1 9, 2 , 16 larvae, 16.IV.1965; CUI. 5 larvae,
13.III.1970; DALA TANDO, 25 larvae, 25-26.Vlli.1969; HUAMBO, 27 larvae,
6-19.V.1971; JANGADA DO CUANGAR (50 km W), 4 larvae, 20.1V.1965:
LUANDA, 2 larvae, 19.III. 1971; LUBIRI, 4 larvae, 30.III. 1972; MALANJE, 1 larva,
12.IV.1971; N'GIVA, 2 larvae, 18.II.1970; PANDA, 35 larvae, 14-15.IV.1965: SAU-
RIMO, 4 larvae, 10-11.IV.1971; SERPA PINTO, 10 larwte, 24.V.1971: TOMBINGA,
4 larvae, 28.VIII. 1969.
TAXONOMIC NOTES. Both our adult and larval specimens agree ouite
well with the descriptions of C. nebulosus given by Theobald (6),
Edwards (8) and Hopkins (24).
Considering its known distribution in Angola (see below), both
presumed subspecies of C. :ebutosus were expected to be represented
in the country. According to the available evidence, however, we are
not satisfied of the characters given by Edwards (op. cit.) and by
Peters (44), on which is based the recognition of the nominal and pseudo..
cinereus subspecies. On the other hand, if we take into account the
occurrence of both adult forms in the same area (e.g. Elisabethville),
as it is cited by Mattingly (42) and by Peters (op. cit.), there seems to
be strong indication to treat C. nebutosus as a polymorphic species and
not as a polytypic one. In fact, polymorphism is to be expected in those
monotypic species which are able to occupy novel ecological niches
[Mayr (45), pp. 150 et seq.; p. 245], such as that offered by the immediate
human environment.
DISTRIBUTION. Map 7 shows the wide known distribution of C.
nebulosus in Angola, extending to both West and East-South African
Subregions (cf. Maps 2 and 3).
BIOECOLOGICAL NOTES. Our adult specimens of C. nebutosus were
all reared from larvae.
37 nebulosus breeding places were recorded by the writers, 21 of
which in the peridomestic habitat and 16 in the sylvatic habitat. As
154 Estud., Etas. e Doc. 134