Metriocnemus eryngiotelmatus Donato & Paggi, 2005, n. sp
| Main Authors: | Donato, Mariano, Paggi, Analía C. |
|---|---|
| Format: | info publication-taxonomictreatment Journal |
| Terbitan: |
, 2005
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5668661 |
Daftar Isi:
- Metriocnemus eryngiotelmatus n. sp. Type material: Holotype male with larval and pupal exuviae number 5183 / 1 (MLP), Punta Lara, 34 ° 51.090 'S 57 ° 57.543 'W, Buenos Aires, Argentina, 4 vii 2004, M. Donato, leg. Allotype female with larval and pupal exuviae number 5183 / 2 (MLP), Punta Lara, 34 ° 51.090 ́S 57 ° 57.543 ́W, Buenos Aires, Argentina, 4 vii 2004, M. Donato, leg. Paratypes: 2 males with larval and pupal exuviae numbers 5183 / 3–4 (MLP), Punta Lara, 34 ° 51.090 ́S 57 ° 57.543 ́W, Buenos Aires, Argentina, 4 vii 2004, M. Donato, leg.; male with larval and pupal exuviae number 5183 / 5 (MLP), Arroyo El Pescado y Ruta Nac. 11, 34° 57.618 ́S 57 ° 46.628 ́W, Buenos Aires, Argentina, 15 viii 2004, M. Donato, leg.; male with larval and pupal exuviae number 5183 / 6 (MLP), Ruta Prov. 51 cerca de Coronel Pringles, 37 ° 54 ́57.6 ««S 61 ϋ 15 ́41.2 ́W, Buenos Aires, Argentina, 15 ii 2005, M. Donato, leg.; 3 females with larval and pupal exuviae numbers 5183 / 79 (MLP), Punta Lara, 34 ° 51.090 ́S 57 ° 57.543 ́W, Buenos Aires, Argentina, 4 vii 2004, M. Donato, leg.; female with larval and pupal exuviae numbers 5183 / 10 (MLP), Arroyo El Pescado y Ruta Nac. 11, 34° 57.618 ́S 57 ° 46.628 ́W, Buenos Aires, Argentina, 15 viii 2004, M. Donato, leg. Other material examined: male with larval and pupal exuviae (MLP), Ruta Prov. 51 cerca de Coronel Pringles, 37 ° 54 ́57.6 S 61 ° 15 ́41.2 ́ ́W, Buenos Aires, Argentina, 15 ii 2005, M. Donato, leg.; 2 females with larval and pupal exuviae (MLP), Balneario Ferrando, Colonia del Sacramento, Uruguay, 10 x 2004, M. Donato, leg.; 5 larvae (MLP), Sierras de Aceguá, 31 ° 51.429 ́S 54 ° 19.230 ́W, Cerro Largo, Uruguay, 15 ii 2005, M. Donato, leg. Additional material studied (in the collection of Dr. J. E. Sublette): Metriocnemus costatus Sublette & Sasa: Holotype male, Barretal, Guatemala, number II51, 22i 81, Sasa, leg.; Allotype female, Barretal, Guatemala, number II 67 (on same slide with paratype male, pupal exuviae), 25 ii 81, Sasa, leg.; Paratypes: pupal male, Barretal, Guatemala, II 53, Sasa, leg.; 3 males, Barretal, Guatemala, number II 54, Sasa, leg. Metriocnemus lautus Sublette & Sasa: Holotype male, Lavaderos, Guatemala, number II56, 22x 81, Sasa, leg. Metriocnemus virgatus Sublette & Sasa: Holotype male, Rincón, Guatemala, number II 77 (larva mounted on same slide), 16 iii 81, Sasa, leg.; Allotype female, Barretal, Guatemala, number II 83 (on same slide with paratype male), 16 iii 81, Sasa, leg.; Paratype pupal male, number II 73, Sasa, leg. Etymology: The species name “ eryngiotelmatus ” refers to Eryngium, the host plant, and telma, from Greek, meaning pool. Male imago (n = 6, except when otherwise stated) (Figs. 2 A, C–E) Total length 3.13–3.92, 3.57 mm, Wing length 1.67–2.15, 1.88 mm; width 0.45–0.63, 0.53 mm. Total length/wing length 1.82–1.98, 1.89. Wing length/length of profemur 1.93–2.08, 1.99. Coloration uniformly dark brown with light spots at base of setae, mainly on thorax and abdomen. Head. AR 1–1.25, 1.1 (n = 5). Antennae with 13 flagellomeres. Ultimate flagellomere 427.1–579.6, 503.9. Temporal setae 34 –48, 39. Clypeus with 21 –37, 32 setae. Cibarial pump, tentorium, and stipes as in Fig. 2 C. Tentorium 166.7–217.2, 194.9 μm long; 30.3– 45.4, 36.6 μm wide. Stipes 88.4–103.5, 96.9 μm long (n = 5); 30.3–63.1, 49.5 μm wide (n = 5). Palp segment lengths 42.9–50.5, 46.7; 35.3–65.6, 45.1; 189.4–284.7, 229.1; 138.9– 213.5, 172.7 (n = 5); 194.5–244.1, 215.1 (n = 5). Thorax (Fig. 2 D). Antepronotum with 9 –16, 12 lateral setae. Dorsocentrals 61 –102, 81; acrostichals 46 –50, 48; prealars divided in two groups, anterior 13 –21, 16, and posterior 13 –29, 18; supraalars 2–3. Scutellum with 12 –23, 16 fine setae, and 16 –30, 22 coarse setae. Preepisternals 5 –14, 10. Wing (Fig. 2 A). VR 1.19–1.28, 1.23. C extension 75.7–223.7, 158.8 μm long and with 45 –74, 58 non marginal setae. Brachiolum with 6 –9, 8 setae; R with 65 –95, 76; R 1 with 45 –67, 55; R 4 + 5 with 94–138, 122; RM with 3 –9, 6; M with 16 –33, 22; M 3 + 4 with 53 –70, 58; Cu with 53 –95, 78; Cu 1 with 31 –54, 37; PCu with 117–153, 139. Wing membrane with setae covering most cells. Squama with 15 –28, 21 setae. Legs. Spur of front tibia 78.3–101.7, 88.5 μm long; spurs of middle tibia: 37.8–51, 43.0 and 42.9–53, 49.3 (n = 4); of hind tibia: 40.4–48, 44.4 and 75.7–98.5, 86.7 μm long (n = 5). Width at apex of front tibia 45.4–60.6, 53.8; of middle tibia 50.5–60.6, 55.1; of hind tibia 50.5–71.9, 63.3. Comb with 9–10 setae. Lengths (in μm) and proportions of legs in Table 1. Hypopygium (Fig. 2 E). Without anal point. Setae on tergum IX 46 –52, 48 (n = 3), laterosternite IX with 5 –7, 6 setae. Phallapodeme 108.6 – 98.5, 194.2 μm long; transverse sternapodeme 116.2 –101.0, 111.7 μm long with oral projections. Without virga. Gonocoxite 285.4 – 227.3, 261.8 μm long; inferior volsella flat, ending at 0.59–0.66, 0.62. Gonostylus 143.9 – 118.7, 129.6 μm long; crista dorsalis low, almost straight; megaseta 10.3 – 8.8, 9.8 μm long. HR 2.15 – 1.8, 2.01; HV 3.04 – 2.6, 2.76. Female imago (n= 5, except when otherwise stated) (Figs. 2 B, F–G) Total length 2.7–4.2, 3.2 mm, Wing length 1.57–2.02, 1.72 mm; width 0.5–0.7, 0.6 mm. Total length/wing length 1.6–2.1, 1.8. Wing length/length of profemur 1.85–1.95, 1.91. Coloration as in male. Head. AR 0.2–0.32, 0.26. Lengths (in μm) of flagellomeres: 65.4 –101.0, 86.3; 60.6– 75.7, 68.2; 58.1–90.9, 73.7; 58.1–85.8, 69.2; 73.2–88.4, 81.3. Temporal setae 48 –82, 59. Clypeus with 37 –54, 44 setae. Tentorium 138.9–161.6, 148.0 long; 20.2. 25.2, 24.2 wide. Stipes 85.8–113.6, 104.8 long; 53.1–75.7, 68.2 wide (n = 5. Palp segment lengths (in μm): 30.3–58.1, 44.9; 32.8–60.6, 47.4; 146.5–232.4, 197.5; 149.0– 189.4, 173.7; 181.8–242.5, 220.2. Thorax. Antepronotum with 8 –20, 13 lateral setae. Dorsocentrals 51 –110, 80 in some specimens including 9 or 10 on humeral area; acrostichals 24 –50, 36; prealars divided in 2 groups, anterior 8 –31, 16, and posterior 14 –35, 21; supraalars 2 or 3. Scutellum with 12 – 20, 16 fine setae, and 14 –35, 21 coarse setae. Wing (Fig. 2 B). VR 1.26–1.38, 1.31. Brachiolum with 8 –16, 11 setae. Wing membrane with setae covering most cells. Squama with 15 –22, 18 setae. Legs. Spur of front tibia 65.6–88.4, 75.2 long; spurs of middle tibia: 27.2–40.4, 31.7 and 32.8–42.9, 35.3; of hind tibia: 30.3–41.6, 35.1 and 32.8–42.9, 38.8 m long. Width at apex of front tibia 47.9– 63.1, 54.0; of middle tibia 50.5–65.6, 55.8; of hind tibia 60.6– 83.3, 71.2. Lengths (in μm) and proportions of legs in Table 2. TABLE 1. Measurements (μm) and proportions of legs of male Metriocnemus eryngiotelmatus n. sp. Abbreviations: Femur (Fe); Tibia (Ti); Tarsomeres 1–5 (Ta 1–5); Leg Ratio (LR), ratio of metatarsus to tibia; “Beinverhältnisse” (BV), combined length of femur, tibia, and basitarsus divided by combined length of tarsomeres 2–5; “SchenkelScheineverhältnis” (SV), ratio of femur plus tibia to metatarsus. SV P 1 2.61–2.8, 2.72 P 2 3.94–4.55, 4.34 P 3 3.72–3.98, 3.83 Genitalia (Fig. 2 F). Gonocoxite IX with apicomedial projection and rounded at end, with 26 –36, 32 setae (n = 3). Gonapophysis VIII as shown in Fig. 2 G. Tergite IX subrectangular with 34 –60, 50 setae (n = 3). Cercus 65.6–80.8, 73.2 μm long. Seminal capsule 68.2–88.4, 79.3. Notum 126.3–184.3, 155.6 μm long. Pupa (n = 6, except when otherwise stated) (Figs. 3 F–J) Total length 4.03– 5, 4.35 mm. Exuviae hyaline. Cephalothorax (Fig. 3 I). Frontal apotome sexually dimorphic; female apex (Fig. 3 F) more acute than male apex (Fig. 3 G). Distance between Dc 1 and Dc 2 18.9–63.1, 37.6 (n = 5); between Dc 2 and Dc 3 12.6–27.7, 23.04 (n = 4); between Dc 3 and Dc 4 7.5–15.1, 11.3 (n = 4). SV P 1 2.72–2.84, 2.78 P 2 4.52–4.82, 4.7 P 3 3.58–3.94, 3.79 Abdomen (Fig. 3 H). Tergites III–VIII with apical row of tubercles. Tergum III–VIII with tubercles as follows (n = 5); 26 –33, 29; 25 –29, 27; 25 –29, 28; 27 –32, 29; 27 –29, 28; 17 –26, 23. Tergites III–VIII with basal band of clustered microtrichia of 3 types: simple, with 2 microtrichia usually clustered at base, and with 3 or 4 microtrichia usually clustered at base. Total number of microtrichia on Tergum III 152–182, 167 (n = 4). Anal lobe angular with 2 pale setae. Anal lobe length 214.7–265.2, 234.9 (n = 5). Genital sac length 176.8–237.4, 209.3 (n = 4). Larva (n = 5, except when otherwise stated) (Figs. 3 A–E) Total length 0.5–0.62, 0.54 mm (n = 3). Head capsule 99–120, 110 μm long. Coloration yellowish with head somewhat darker than body. Head. Lengths of antennal segments (in μm): 20–23, 21.2; 4–7, 5.4; 1–3, 2.1; 1–2, 1.4; 0.5–1.5, 1. AR 0.4–0.5, 0.46. Basal antennal segment 8–9, 8.8 μm wide; distance from base to ring organ 5–6, 5.75 (n = 4); to basal mark of seta 8–10, 9.5; blade 9–12, 10.3 (n = 3). Setae I plumose; labral lamellae plumose. Mandible (Fig. 3 C) 53–65, 59.2 μm long, with 7 setae in seta interna. Mentum (Fig. 3 A) with central teeth lower than first pair of lateral teeth. Postmentum 69–80, 74.6 μm long.
- Published as part of Donato, Mariano & Paggi, Analía C., 2005, A new Neotropical species of the genus Metriocnemus van der Wulp (Chironomidae: Orthocladiinae) from Eryngium L. (Apiaceae) phytotelmata, pp. 1-14 in Zootaxa 1050 on pages 3-10, DOI: 10.5281/zenodo.169974