Paralimnophyes trilineatus (Lundström) Lundstrom
- Dataset
- The chironomids (Diptera, Chironomidae) described by Lundström (1915) from arctic Siberia, with a redescription of Derotanypus sibiricus (Kruglova & Chernovskii)
- Rank
- SPECIES
- Published in
- Saether, Ole A. (2004): The chironomids (Diptera, Chironomidae) described by Lundström (1915) from arctic Siberia, with a redescription of Derotanypus sibiricus (Kruglova & Chernovskii). Zootaxa 595: 1-35, DOI: 10.5281/zenodo.157906
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Insecta
- order
- Diptera
- family
- Chironomidae
- genus
- Paralimnophyes
- species
- Paralimnophyes trilineatus
description
MALE IMAGO (n = 1 – 3) Total length 3.10 – 3.55 mm. Wing length 1.65 – 1.80 mm. Total length / wing length 1.83 – 1.98. Wing length / length of profemur 2.55 – 2.65. Coloration totally brownish black. Head. AR 0.86. Ultimate flagellomere 459 m long. Temporal setae 8, including 1 – 2 inner verticals, 4 – 5 outer verticals, and 1 – 3 postorbitals. Clypeus with 18 – 23 setae. Tentorium 169 m long, 30 – 38 m wide. Stipes 150 – 169 m long, 41 m wide. Palpomere lengths (in m): 53, 60 – 71, 94 – 109, 86 – 98,124. Third palpomere with 1 – 2 lanceolate sensilla clavata 15 – 23 m long. Thorax. Antepronotum with 2 setae. Acrostichals 7 – 8 (scalpellate, in centre of scutum), dorsocentrals 13 – 14, prealars 3 – 4. Scutellum with 8 – 10 setae. Wing. VR 1.22 – 1.33. Costal extension 64 m long. Brachiolum with 1 seta, R with 13 – 15 setae, R 1 with 1 – 2, R 4 + 5 with 5 setae. Squama with 5 – 6 setae. Legs. Spur of front tibia 60 – 68 m long, spurs of middle tibia 26 – 30 and 23 m long, of hind tibia 45 – 56 and 19 – 26 m long. Width at apex of front tibia 45 – 53 m, of middle tibia 45 – 60 m, of hind tibia 56 – 60 m. Sensilla chaetica 8 – 11 on ta 1 of mid leg, about 10 on ta 1 of hind leg. Lengths (in m) and proportions of legs: Hypopygium (Fig. 19). Tergite IX reticulate, with 16 – 20 setae; laterosternite IX with 8 setae. Anal point parallelsided, 34 – 41 m long, on 94 m long, 113 m wide triangular base. Phallapodeme 113 – 143 m long, with rounded phallapodeme lobe; transverse sternapodeme 143 – 169 m long, oral projections well developed. Gonocoxite 300 – 341 m long. Gonostylus 105 – 131 m long, parallelsided, crista dorsalis long and low, megaseta 15 m long. HR 2.60 – 2.86, HV 2.71 – 2.95. FEMALE IMAGO (n = 1) Total length about 3.0 mm. Wing length 1.85 mm. Total length / wing length about 1.6. Wing length / length of profemur 3.27. Coloration as in male. Head. AR 0.51. Length of flagellomeres (in m) as: 75, 60, 68, 41, 135. Temporal setae 8, consisting of 2 outer verticals; 4 inner verticals, and 2 postorbitals. Clypeus with 18 setae. Tentorium 169 m long, 23 m wide; stipes 139 m long, 30 m wide. Palpomere lengths (in m): 49, 56, 75, 83, Pm 5 lost. Thorax. Antepronotum with 2 lateral setae. Acrostichals 12 (scalpellate), dorsocentrals 18, prealars 4. Scutellum with 12 setae. Wing. VR 1.21. Costal extension 49 m long. Brachiolum with 1 seta, R with 14, R 1 with 9, R 4 + 5 with 7 setae. Squama with 7 setae. Legs. Spur of front tibia 41 m long, spurs of mid tibia 30 m and 23 m long, spurs of hind tibia 26 m and 24 m long. Width at apex of front to hind tibiae (in m) as: 45, 49, 56. Comb of 11 setae; shortest seta 26 m long. longest seta 41 m long. Sensilla chaetica 14 on ta 1 of front leg, 13 on ta 1 of mid leg, and 8 on ta 1 of hind leg. Lengths (in m) and proportions of legs: Abdomen. Tergite I with 22 setae, T II – VII each with 25 – 32 setae, T VIII with 22 setae. Setae on sternites I – VIII as: 0, 6, 11, 15, 19, 19, 20, 15. Genitalia (Fig. 20). Tergite IX apparently undivided, with 20 setae. Gonocoxite with 13 setae. Cercus 135 m long. Seminal capsule 98 m long, 83 m wide; with wide, long, curved neck. Spermathecal ducts with very long loops. Gonapophysis VIII divided, with large ventrolateral lobe and narrow dorsomesal lobe. Notum 150 m long. Remarks All details of this easily recognisable species are in accordance with those given by Brundin (1956: 130) as well as the few details given by Lundström (1915: 15).
materials_examined
Type material examined. RUSSIA: New Siberian Islands, south coast, " Holzgebirge ”, lectotype ɗ, here designated, 22 vi 1903, M. I. Brussnew; paralectotypes 2 ɗ, 1 Ψ, 3 & 16 vi 1903, M. I. Brussnew.