Culex (Culex) ameliae Casal
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publication ID |
https://doi.org/ 10.5281/zenodo.202653 |
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DOI |
https://doi.org/10.5281/zenodo.5620478 |
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persistent identifier |
https://treatment.plazi.org/id/785687E1-FFE1-FFB8-D2A5-FEDCFE012EDB |
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treatment provided by |
Plazi |
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scientific name |
Culex (Culex) ameliae Casal |
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Culex (Culex) ameliae Casal View in CoL
Culex ameliae Casal, 1967: 29 View in CoL (M*). Type locality: between San Pedro and Eldorado, 10 km from San Pedro, Misiones, Argentina (INM).
Adult males and females of Cx. ameliae View in CoL were well diagnosed by Casal. In addition to the characteristic genitalia in the male, both sexes show a unique character, the presence of short, filiform tan scales on the mesopostnotum ( Fig. 1 View FIGURE 1 ).
This feature makes the species sufficiently different from other Cx. (Cux.). Harrison & Bickley (1990), when reviewing the presence of ornamentation on the mesoposnotum of Culicidae View in CoL , mention that only some species of the Culex View in CoL subgenera Melanoconion Theobald and Carrollia Lutz possess mesopostnotal scales/setae. They did not mention the subgenus Culex View in CoL , which includes 198 species (Mosquito Taxonomic Inventory 2007), some of which exhibit with exceptional and many polymorphic features. There was no mention of Cx. ameliae View in CoL , although Casal (1967) mentioned the character in the original description.
PUPA ( Fig. 2 View FIGURE 2 ). Placement and character of setae as figured; range and modal number of branches in Table 1. Cephalothorax ( Fig. 2 View FIGURE 2 a): integument lightly tanned, homogeneously colored, maxillary palpus, distal extreme of legs and posterior of scutum sometimes slightly darker, metanotum evenly tanned, sometimes lighter laterally. Trumpet almost cylindrical, tanned, length 0.76–0.91 mm (0.84 mm), width 0.08–0.13 mm (0.10 mm), index 7–10 (8.45). Abdomen ( Fig. 2 View FIGURE 2 b): length 3.35–4.00 mm (3.57 mm); integument yellowish. Seta 1-I with 8–28 aciculate branches. Setae 4,6,8-IV with secondary short branches at apex. Seta 9-VIII with variable number of branches. Genital lobe: slightly tanned in both sexes, males: length 0.20–0.25 mm (0.22 mm); females: length 0.10–0.11 mm. Paddle: length 0.85–1.09 mm (0.96 mm), width 0.44–0.63 mm (0.50); index 1.34–1.73 (1.52). Yellowish to slightly tan, midrib strong, extending length of paddle. Seta 2-Pa between 0.25-0.50 length of 1-Pa.
Seta Cephalothorax Abdominal segments Paddle
no. CT Pa
I II III IV V VI VII VIII
0 - - - 1 1 1 1 1 1
1 1−3(3) 8−48 8−11 (9) 5−10(8) 4−6(5) 2−5(5) 2−4(4) 2,3(3) - 1
2 1 1 1 1 1 1 1 1 - 1
3 2−3(2) 1,2(2) 1−3(3) 2,3(2) 2−5(3) 1−3(1) 1−3(1) 1−3(3) -
4 1−3(2) 3,4(4) 2−4(2) 1−4(2) 1−5(1) 2−4(4) 1−4(4) 1,2(2) 1,2(2) LARVA (fourth-instar) ( Fig. 3 View FIGURE 3 ). Placement and character of setae as figured; number of branches in Table 2. Head ( Fig. 3 View FIGURE 3 a): slightly wider than long, width 1.35 mm, length 1.0 0 mm, collar narrow. Dorsomentum with pointed teeth, 6 or 7 teeth on each side of median tooth, lateral teeth slightly longer than the others. Setae 1,3-C single, setae 0,2,16,17-C absent. Antenna: length 0.34–0.75 mm, aciculate. Seta 1-A fanlike with 20–22 aciculate branches, inserted 0.46–0.55 mm from base. Setae 2–4-A longer than in other Culex (Culex) View in CoL . Thorax ( Fig. 3 View FIGURE 3 b): integument hyaline, with spicules up to 10 µm long. Seta 4-M subequal to 5-M, longer than in other Cx. (Cux.). Seta 6-M conspicuously longer than 1,3-M. Setae 10-P and 12-M long, 0.21 and 0.19 mm respectively. Abdomen ( Fig. 3 View FIGURE 3 b): integument hyaline, with spicules about 10 µm long. Setae 0,14-I–VI at most 1 µm in length. Setae 1,2- I,II very short. Segment VIII ( Fig. 3 View FIGURE 3 c): seta 4-VIII with 6 branches, comb with 51, 52 scales arranged in 2 rows. Siphon ( Fig. 3 View FIGURE 3 c): length 2.08–2.24 mm, width 0.26–0.28 mm. Pecten with 17–19 spines with 2 basal denticles. Seta 1-S in 10 pairs, most basal arises beyond pecten, 1i-S not in line with the others. Segment X ( Fig. 3 View FIGURE 3 c): saddle complete, length 0.27–0.30 mm, with spicules on dorsal surface and caudal border. Setae 2,3-X strongly developed. Seta 4-X in 6 pairs. Anal papillae long and slender, dorsal pair longer than ventral pair.
Seta Head Thorax Abdominal segments
no. H P M T I II III IV V VI VII VIII X 0 - 10,11 - - 1 1 1 1 1 1?? - 1 1 1 1 1 3,4 3 1,3 4 4 3,4 5,6 3 2,3 2 - 1 3 2 2 2 1,2 1 1 1 2 1 2 3 1 1 1 3 1,4 1,3 1 1 1 1 1 4,7 1 4 1,2 2 1,2 3 1,5 3,5 1,3 1 1 3,4 1 6 12 5 4 1 1 1 2 2,3 3 4 3 2 1,2 3,5 - 6 3,4 1,2 1 1,2 3 3 2 2 2 2 4,6 - Siphon 7 2,8 2,3 1 1,6 1,2 2,3 4,5 4,6 5,6 6 1,6 1a-S 4 8 2-4 2 5,6 9,15 - 1,2 1 1 2 1,4 1 1b-S 4 9 5 1 1,4 1 2 1,4 1 3 1 1 3 1c-S 4,5 10 2 1 1 1 1 1 1,2 1 1 1 1 1d-S 3,5 11 2 3 2 7 4 3,7 1,2 1 1 1 2 1e-S 4,5 12 2,3 1 1 1 2,3 2 1 1 1 1 1 1f-S 4,5 13 2 - 12,23 6 4,7 4,18 5,12 4 4 22,23 4 1g-S 4 14 1,2 1 14,16 - 1 1 1 1 1 1 1 1h-S 4,5 15 3,5 - - - - - - - CS Pecten 1-A 1i-S 3,4 51,52 17,19 20,22 1j-S 4
? = not counted.
Material examined. 10Pe, 3Le as follow: ARGENTINA, Misiones Province, between San Pedro and Eldorado, 10 km from San Pedro (26º 24´49.1´´ S – 54º 30´36.1´´ O), 11-III-1966, García & Casal coll. Paratypes have the following numbers: Ga 137-31; Ga 136-21; Ga 131-105; Ga 137-102; Ga 137-104; Ga 131-106; Ga 131-111; Ga 132-104; Ga 132-105; Ga 132-106.
Distribution. Culex ameliae is known only from Argentina (Walter Reed Biosystematics Unit 2001), and is considered endemic to the type locality ( Campos & Maciá 1998).
Bionomics. Larvae of Cx. ameliae were collected in association with larvae of Cx. (Melanoconion) intrincatus Brethès, Cx. (Mel.) bejaranoi Duret, Cx. (Cux.) chidesteri Dyar and Cx. (Cux.) dolosus (Lynch Arribálzaga) ( Casal 1967) . Casal mentioned only that the larvae were collected in a flooded depression.
Taxonomy. The larva of Cx. ameliae is very similar to the larva of Cx. chidesteri . The latter differs from Cx. ameliae in the following characters: the length of seta 4-M is less than 0.50 of 5-M, the thorax has spicules longer than 10 µm, the siphon is darker, seta 1a-S is inserted within the pecten and the last pecten spine is more widely separated from the others.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
