Culex torrentium (L)
Culex torrentium Martini, 1925
Type-loc: Germany
Almost impossible to differentiate from Culex pipiens s.l.; lateral seta of the anal segment saddle (seta 1-X) often with 2 branches in Culex torrentium, more rarely in Culex pipiens s.l. Siphon size variable (index from 4 to 6).
Culex torrentium (L)
Culex torrentium (L)
- Developmental stage : 2. larva
- ABDOMEN: Arrangement of the siphon setae 1-S : 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 and 4-P : 2. one of the two setae 1 branch, the other seta 2 or more branches
Head
- HEAD: Colour of maxillary palpus : 1. entirely dark
- HEAD: Colour of proboscis : 1. entirely dark
- 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. close to the seta 4-A
- HEAD: Shape of the pre-clypeal seta 1-C : 1. thin and slender at the apex
- 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 area's ornamentation : 2. with at most 1 or 2 pale scales ; 3. with 1 pale scale patch
- THORAX: Lower mesepimeral seta : 2. 1 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 : 2. 2 branches
Wings
- WING: Colour of the scales on the wing veins : 1. dark scales only
- WING: Position of wing veins R2+3 and M1+2 : 1. furcation of vein R2+3 is closer to furcation of vein M1+2 ; 2. furcation of vein R2+3 more distant from the 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 : 1. entirely dark or with some pale scales at the apex
- 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 : 2. with an apical pale ring
- LEG I: Colour of the scales on the coxa : 1. with a majority of pale scales
- LEG II: Tibia's colour : 2. with an apical pale ring
- 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
- LEG III: Colour of femur : 1. with the basal half partially dark
Abdomen
- ABDOMEN: Ornamentation of tergite III - Cx : 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 saddle seta 1-X : 2. 2 branches
- 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
- ABDOMEN: Length of seta 1a-S and the siphon's 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 : 2. 2 to 5 branches
- ABDOMEN: Siphon index (total length/diameter at base) : 2. from 3 to 4.5 ; 3. from 4.6 to 5.9
- ABDOMEN: General shape of the siphon : 1. with staight sides ; 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 : 2. 2 branches
- ABDOMEN: Number of branches of the seta 7-I : 2. 2 branches ; 3. 3 or more branches
Distribution
- SAMPLING AREA: West of Western Palaearctic Region : Austria ; Belgium ; Corsica ; Czech Republic ; Denmark ; Estonia ; Finland ; France ; Germany ; Greece ; Hungary ; Ireland ; Italy ; Lithuania ; Luxembourg ; Netherlands ; Norway ; Poland ; Portugal ; Romania ; Serbia ; Shetland ; Slovakia ; Spain ; Sweden ; Switzerland ; United Kingdom
- SAMPLING AREA: East of Western Palaearctic Region : Armenia ; Belarus ; Crimean Peninsula ; Moldova ; Russia - Northwestern ; Russia - Western - Central ; Russia - Western - Volga ; Russia - Southwestern ; Turkey
- SAMPLING AREA: South of Western Palaearctic Region : Algeria