Culex duttoni (L)
Culex duttoni (Theobald, 1901)
Type-loc: Nigeria
The strongly bulbous siphon in its middle, very narrow to the apex and adorned with a dark subapical ring forbids any confusion with another species.
Culex duttoni (L)
Culex duttoni (F)
- Developmental stage : 2. larva
- ABDOMEN: Arrangement of the siphon setae 1-S : 1. only ventral setae ; 2. ventral and lateral setae
- HEAD: Number of branches of the seta 6-C : 4. 4 or more branches
- THORAX: Number of branches of the prothoracic seta 3-P : 1. 1 branch
Head
- HEAD: colour of maxillary palpus : 1. entirely dark
- HEAD: colour of proboscis : 5. with a clearly marked median pale ring
- HEAD: Number of teeth of the mentum : 2. 8 teeth or more on each side of the median tooth
- HEAD: Insertion of the antennal seta 3- A : 1. colse to the seta 4-A
- HEAD: Shape of the pre-clypeal seta 1-C : 2. stout all along
- HEAD: Number of branches of the seta 4-C : 1. 1 branch
- HEAD: Number of branches of the seta 5-C : 4. 4 or more branches
- HEAD: Number of branches of the seta 14-C : 1. 1 branch ; 2. 2 or more branches
Thorax
- THORAX: Prespiracular and postspiracular setae : 1. prespiracular and postspiracular setae absent
- THORAX: scutum's ornamentation : 1. without well-marked patterns
- THORAX: prealar areas ornamentation : 1. without prealar scales
- THORAX: lower mesepimeral seta : 3. 2 or more setae
- THORAX: postspiracular area's ornamentation : 1. without scales ; 2. with scales
- THORAX: Number of branches of the prothoracic seta 8-P : 3. 3 or more branches
- THORAX: Number of branches of the prothoracic seta 4-P : 1. 1 branch ; 2. 2 branches ; 3. 3 or more branches
Wings
- WING: colour of the scales on the wing veins : 2. pale scales only along the costal margin
- WING: position of wing veins R2+3 and M1+2 : 1. furcation of vein R2+3 is closer to furcation of vein M1+2
- WING: Uranotaenia or not : 2. apex of anal vein ends after mcu/cuA fork ; 4. length of the R2+R3 vein is shorter than R2/R3
- WINGS and LEGS I - III: Culex or Coquillettidia : 2. wing scales narrow, pulvili present, claws smaller - Culex genus
Legs
- LEG I: tibia's colour : 2. with an apical pale ring
- LEG I: Orthopodomyia or not : 2. tarsomere 4 is equal or longer than tarsomere 5 ; 4. length of tarsomere 1 is shorter than tarsomere 2 through 5
- LEG III: colour of tibia : 3. with two pale rings (base + apex) ; 4. with a longitudinal pale band
- LEG I: colour of the scales on the coxa : 1. with a majority of pale scales ; 2. with pale and dark scales
- LEG II: tibia's colour : 3. with two pale rings (base + apex)
- LEG II: colour of the external side of the femur : 3. with a mixture of pale and dark scales
- LEG III: relative sizes of tarsomere 1 and tibia : 1. tarsomere nearly as long as tibia ; 3. tarsomer clearly longer than tibia
- LEG III: colour of femur : 1. with the basal half partially dark
Abdomen
- ABDOMEN: colour of tergite III : 2. with a basal pale band
- ABDOMEN: Ornametation of tergite III : 2. with a basal pale band
- ABDOMEN: Respiratory aperture - Siphon : 2. opening at the apex of a cylindrical tube - siphon
- ABDOMEN: Siphonal tufts : 1. several pairs of siphonal tufts - Culex
- ABDOMEN: Abdominal plates : 1. abdominal plates absent
- ABDOMEN: Number of branches of the caudal seta 1-X : 1. 1 branch
- ABDOMEN: Shape of the siphon sub-apical spine 2-S : 1. short
- ABDOMEN: Shape of the distal tooth of the siphon pecten : 2. 3 to 5 basal denticles ; 3. more than 5 basal denticles
- ABDOMEN: Length of seta 1a-S and the siphon's diameter : 1. seta is shorter than or equal to the diameter ; 2. seta is longer than the diameter
- ABDOMEN: Insertion of the seta 1-S _ Culex : 3. beyond the last pecten tooth
- ABDOMEN: Number of branches on seta 1a-S on the siphon : 1. 1 branch
- ABDOMEN: Siphon index (total length/diameter at base) : 1. smaller than 3 ; 2. from 3 to 4.5
- ABDOMEN: general shape of the siphon : 2. with convex sides
- ABDOMEN: shape of the comb scales : 1. all without a median spine
- ABDOMEN: arrangement of the comb scales : 2. untidy
- ABDOMEN: Number of branches of the seta 6-VI : 1. 1 branch
- ABDOMEN: Number of branches of the seta 7-I : 3. 3 or more branches