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

RIBEIRO, H. & RAMOS, H. Cunha -- <strong>Research</strong> on the mosquitoes o1' Angola -- X
rubber tires (7 biotopes), barrels (5), 2 cement tanks and a discarded
tin. Curiously enough, this marked man-association of the nominate
subspecies of C. trifilatus is in contrast with the known breeding preferences
of ssp. aenescens (24). The breeding water was either clean
or turbid, dark or greenish water. The pH, measured in one instance,
was 6.4.
In 3 out of the 15 larval biotopes no larvae of other mosquitoes
were found. The associated species in the remainder 12 biotopes were
the following, by decreasing order of frequency: Culex p. quinque/asciatus
(in 7 biotopes), Aedes aegypti (5), C. tigripes (3), and Aedes
marshalii, Culex annulioris, C. duttoni, C. nebulosus, C. toroensis and
Toxorhynchites brevipalpis, only once. As it would be expected, all of
these associated species are also known to be able to breed in artificial
cortainers. Lastly, it is to be noted the absence of tril'ilatus from
the peridomestic biocoenosis of the coastal belt in Angola.
C. t. tri/ilatus females seem to take only animal (avian?) blood.
7.5.29 -- Culex (Culex) tri/oliatus Edwards, 1914
The only previous record of C. tri/oliatus in Angola was that by
Worth & Paterson, from Luso (--Moxico) (12).
MATERIAL EXAMINED. CUNGO, 3 9, ! 3 plus 5 larvae, 23.XI. 1969;
BOCOIO, 1 plus 3 larvae, 7.IX.1970.
TAXONOMIC NOTES. Male specimens of C. trifoliatus can be easily
identified on account of the characteristic leaf-like appendages e and !
in the apical lobe of coxite. Examination of the external morphology
of adults is not always conclusive beyond a group diagnosis within
series decens (but see key under 6).
Described the same year by Van Someren (80) and by Ovazza
et al. (81), the larvae of C. trifoliatus are most able to be confused
with those of C. univittatus. However, these larvae will be almost
always separated by the branching of head setae A and C and saddle
hair, as well as by the denticulation of the pecten spines, these being
the characters used in the larval key given under 6. In our trifoliatus
Estud., Ens. e Doc.--134 ]]3