Polypedilum isigabeceum (Yamamoto, Nao & Yamamoto, Masaru 2016)
| Notice: | This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.
If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly. This page should be cited as follows (rationale):
Citation formats to copy and paste
BibTeX: @article{Yamamoto2016Zootaxa4193, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Yamamoto2016Zootaxa4193">{{Citation |
Ordo: Diptera
Familia: Chironomidae
Genus: Polypedilum
Name
Polypedilum isigabeceum Sasa et Suzuki, 2000 – Wikispecies link – Pensoft Profile
- Polypedilum isigabeceum Yamamoto, Nao, 2016, Zootaxa 4193: 190-191.
Materials Examined
Japan Nakura River
Diagnosis
Diagnosis. The species resembles P. (P.) crassityla Kawai, Inoue et Imabayashi, but distinguish from the latter by having the yellowish scutum with three distinct blackish colour bands and the wing without dark markings.
Description
Male (n = 4). Total length 2.5–2.7 mm. Wing 1.2–1.4 mm long, 0.3–0.4 mm wide; wing length/wing width 3.50–4.13. Colouration. Head including vertex, frons, antennal pedicel and antennal flagellum brown; palpomeres pale brown; clypeus dark brown; labella yellowish brown. Thorax with antepronotum pale brown; scutellum, postnotum, anepisternum I and epimeron I brown; dorsolateral line and halter yellowish white; scutum except dorsolateral line, preepisternum II and posterior 1/2 of epimeron II yellowish brown; anteanepisternum II, medioanepisternum II, anterior 1/2 of epimeron II blackish brown. Legs yellowish brown in ground colour; basal 1/ 3 of fore femora dark brown; fore tarsomere 3-5 pale brown. Abdomen predominately blackish brown. Head (Fig. 1–2). Frontal tubercle 5–10 µm long. 8–10 µm wide. Vertex with 8 temporal setae. AR 1.64–1.70. Prementum with 1 seta. Palpomere lengths (in µm): 20, 28, 83, 90, 115; with 1, 6, 12, 11, 8 setae, respectively; third palpomere with 1 sensillum clavatum. Clypeus with 12 setae. Thorax (Fig. 3). Lateral antepronotals absent. Dorsocentrals 7, uniserial; acrostichals 5, biserial; prealars 3, uniserial. Scutellum with 3 setae, uniserial. Wing (Fig. 4). Anal lobe moderately developed. VR 1.19–1.30. R2+3 nearly parallel with R1 and ended at basal 1/6 between apices of R1 and R4+5. R, R1 and apical 1/2 of R4+5 with 12, 6, 9 setae, respectively. Brachiolum with 2 median setae. Squama with 4 setae. Legs (Fig. 5). Scale of fore tibia triangular, with smoothly rounded apex, without spur or terminal extension, with a long seta. Fore, mid and hind coxae with 5, 2, 3 marginal setae, respectively; fore, mid and hind trochanters with 7, 5, 6 marginal setae, respectively; spur of mid tibia 33–40, 36 µm long, hind tibia 38–48, 43 µm long. Hypopygium (Figs. 6–9). Tergite IX with 8–9 median setae. Anal point long, slender, parallel-sided, with pointed apex (Fig. 7). Superior volsella long, nearly straight, gently tapering to apex, with dorsolateral seta situated on its apical 1/2, base covered microtrichia and 2–3 inner setae (Fig. 8). Inferior volsella long, moderately developed, parallel-sided, boots-like shape apex, reaching level of the anal point apex, with setae on dorsoapical portion, and a long seta extending posteriorly on ventroapical portion (Fig. 9). Phallapodeme 58–63, 60 µm long. Sternapodeme narrow; transverse stenapodome 15–20, 18 µm long. Gonocoxite with 4 uniserially arranged setae on inner margin. Gonostylus long, moderately developed, with one short apical seta and 5–6 long setae on inner margin of apical 5/7.
Distribution
Distribution.Japan (Yaeyama Islands: Ishigaki Island and Iriomote Island)
Fe Ti Ta1Ta2Ta3p1 490–510, 505 255–290, 281 670–700, 690 450–470, 460 310–340, 327p2 550–600, 570 420–450, 440 280–320, 307 150–160, 157 90–110, 100p3 570–620, 593 460–520, 495 420 220 180 Ta4Ta5LR BV SV p1 230–250, 240 100–120, 113 2.31–2.41, 2.38 1.28–1.36, 1.31 1.14–1.19, 1.17p2 50–70, 60 30–40, 35 0.67–0.72, 0.7 3.58–4.03, 3.74 3.15–3.46, 3.29p3 110 80 0.81 2.64 2.71 *P1–3: front-, mid-, hind-legs. Fe: femur. Ti: tibia. Ta1-5: tasomeres 1–5. LR: leg ratio. BV: combined length of femur, tibia and basitarsus divided by combined length of tarsomeres 2–5. SV: ratio of femur plus tibia to metatarsus.
Taxon Treatment
- Yamamoto, Nao; Yamamoto, Masaru; 2016: The taxonomic implication of frontal tubercles in Polypedilum subgenera diagnoses, with re-description of Polypedilum isigabeceum Sasa & Suzuki (Diptera, Chironomidae), Zootaxa 4193: 190-191. doi
This treatment was originally uploaded by Plazi, compare this treatment on Plazi. Unless this treatment has been substantially changed on Species-ID, Plazi requests to maintain a link back to the original repository.
