Demicryptochironomus (Demicryptochironomus) tamacutus Yan & Saether & Jin & Wang 2008, comb. n.
- 1. College of Environmental Science and Engineering, Nankai University, Tianjin 300071 Museum of Zoology, Department of Natural History, Bergen Museum, University of Bergen, N- 5007 Bergen, Norway College of Life Science, Nankai University, Tianjin 300071. E-mail: xhwang @ nankai. edu. cn Corresponding author
Description
(Figs 19–21)
Cryptotendipes tamacutus Sasa, 1983: 6; Yan et al. (2005: 27).
Material examined. Holotype male (NSM No. 67: 21), JAPAN: Tama River, Okutama, 26.vi.1981.
Diagnostic characters. The species is similar to Demicryptochironomus asamaprimus Sasa et Hirabayashi in having a sheet-shaped inferior volsella covered by microtrichia. It can be separated on the tuberclelike superior volsella.
Male (Figs 19–21). As in Sasa (1983: 6) with the following corrections and additions: Brachiolum with 2 setae, R with 28 setae, R 1 with 22 setae, R 4+5 with 32 setae. Midleg without sensilla chaetica. Tergite IX with 28 setae. Laterosternite IX with 5 setae. Anal tergite bands V-shaped. Phallapodeme 105 µm long. Transverse sternapodeme 28 µm long. Superior volsella tubercle-like, with 2–3 setae. Inferior volsella reduced, sheetshaped, covered with microtrichia. Gonocoxite 155 µm long, inner margin with 8 strong setae. Gonostylus 178 µm long, swollen medially, tapering towards apex, inner margin with 12 setae. HR 0.87; HV 2.34.
Remarks. Yan et al. (2005) suggested that the species should be placed in Demicryptochironomus based on the original description and figures. Re-examination of the holotype revealed that the base of the gonostylus of Cryptotendipes tamacutus Sasa is lacking an inner expansion. Based on the tubercle-like superior volsella and the shape of the gonostylus the species is transferred to Demicryptochironomus as a new combination.
Distribution. The species is recorded from Japan.
Notes
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Linked records
Additional details
Identifiers
Related works
- Is part of
- Journal article: http://publication.plazi.org/id/7616CE0B1447CD30FFED544DFF9EFFA3 (URL)
- Is source of
- https://sibils.text-analytics.ch/search/collections/plazi/8A2FB673144DCD3BFF7A51DBFC8FFED9 (URL)
Biodiversity
- Collection code
- NSM
- Event date
- 1981-06-26
- Family
- Chironomidae
- Genus
- Demicryptochironomus
- Kingdom
- Animalia
- Order
- Diptera
- Phylum
- Arthropoda
- Scientific name authorship
- Yan & Saether & Jin & Wang
- Species
- tamacutus
- Taxonomic status
- comb. nov.
- Taxon rank
- species
- Type status
- holotype
- Verbatim event date
- 1981-06-26
- Taxonomic concept label
- Demicryptochironomus (Demicryptochironomus) tamacutus (Yan, 1983) sec. Yan, Saether, Jin & Wang, 2008
References
- Sasa, M. (1983) Studies on chironomid midges of the Tama River. Part 5. An observation on the distribution of Chironominae along the main stream in June, with description of 15 new species. Research Report from the National Institute for Environmental Studies, 43, 1 - 67.
- Yan, C., Tang, H. & Wang, X. (2005) Demicryptochironomus Lenz from China (Diptera: Chironomidae). Zootaxa, 910, 1 - 31.