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Published January 30, 2026 | Version v1
Taxonomic treatment Open

Paracladius akansextus Sasa & Kaminura 1987

Authors/Creators

  • 1. 84 - 3 Abeguchishinden, Aoi-ku, Shizuoka 421 - 2114 Japan.
  • 2. Life Science and Technology College, Jinan University, Guangzhou 510632, China.

Description

Paracladius akansextus Sasa & Kaminura, 1987

Paracladius akansextus Sasa & Kaminura, 1987: 31.

Rheocricotopus shofukusecundus Sasa, 1998: 30. Syn. nov.

Paracladius akansextus – Saether et al. 2000: 153. — Ashe & O’Connor 2012: 451. — Yamamoto & Yamamoto 2014: 284

Rheocricotopus (s. str.) shofukusecundus – Ashe & O’Connor 2012: 572. — Yamamoto & Yamamoto 2014: 298. — Fu et al. 2016: 269, as R. (s. str.) shoufukusecundus (misspelled).

Type material

Holotype of Paracladius akansextus JAPAN – Hokkaido • ♂; Teshikaga, Lake Kussharo; 13 Jun. 1982; K. Kamimura leg.; NSMT, NSMTI-Dip 4583 [101: 56B].

Holotype of Rheocricotopus shofukusecundus JAPAN – Toyama • ♂; Kurobe, Ikuji; 13 Mar. 1997; M. Sasa leg.; NSMT, NSMT-I-Dip 5101 [No. 329: 28].

Remarks

In a re-examination of the holotype of R. shofukusecundus Sasa, 1998, we found the male has a small dorsomedial extension in the hairy eye; at least 13 small pale marks of acrostichal setae, and many weak dorsocentral setae on the scutum; no superior volsella; and a posteriorly hooked inferior volsellae. In addition, the leg is not armed with pulvilli, although the author (Sasa 1998: 30) in the original description wrote: “Tip of tarsi V with an empodium, … and a very small, brush-like pulvilli.” Due to poor mounting, the thoracic humeral areas are damaged. Although the author wrote: “scutum with a pair of large pale humeral pits”, it is quite possible that humeral pits are absent. Therefore, this male belongs to Paracladius Hirvenoja, 1973, not to Rheocricotopus Brundin, 1956. There is no significant difference between this species and P. akansextus Sasa & Kaminura, 1987.

Notes

Published as part of Niitsuma, Hiromi & Tang, Hongqu, 2026, Taxonomic review of Rheocricotopus Brundin, 1956 (Diptera: Chironomidae: Orthocladiinae) from East Asia, with descriptions of twelve new species, pp. 1-114 in European Journal of Taxonomy 1037 on page 102, DOI: 10.5852/ejt.2026.1037.3157, http://zenodo.org/record/18507203

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Linked records

Additional details

Identifiers

URL
http://treatment.plazi.org/id/03F55F24FF84FFE8FE31FBA2CD91CF4A

Is part of
Journal article: 10.5852/ejt.2026.1037.3157 (DOI)
Journal article: http://zenodo.org/record/18507203 (URL)
Journal article: http://publication.plazi.org/id/FFCC275CFFE1FF8EFFC8FFBACE3DCE0C (URL)
Journal article: http://zoobank.org/2143B722-1876-486C-9743-D249D20DFE8C (URL)
Is source of
https://biodiversitypmc.sibils.org/collections/plazi/03F55F24FF84FFE8FE31FBA2CD91CF4A (URL)
https://www.gbif.org/species/315330240 (URL)
https://www.checklistbank.org/dataset/314350/taxon/03F55F24FF84FFE8FE31FBA2CD91CF4A.taxon (URL)

Biodiversity

Collection code
NSMT
Material sample ID
NSMT-I-Dip 5101 , NSMTI-Dip 4583
Event date
1982-06-13 , 1997-03-13
Verbatim event date
1982-06-13 , 1997-03-13
Scientific name authorship
Sasa & Kaminura
Kingdom
Animalia
Phylum
Arthropoda
Order
Diptera
Family
Chironomidae
Genus
Paracladius
Species
akansextus
Taxon rank
species
Type status
holotype
Taxonomic concept label
Paracladius akansextus Sasa, 1987 sec. Niitsuma & Tang, 2026

References

  • Sasa M. & Kaminura K. 1987. Part II. Chironomid midges collected on the shore of lakes in the Akan National Park, Hokkaido (Diptera, Chironomidae). In: Yasuno M., Sugaya Y., Sasa M. and Kamimura K. (eds) Studies on the Chironomid Midges of Lakes in the Akan National Park, Hokkaido. Research Report from the National Institute for Environmental Studies 104: 9-61.
  • Sasa M. 1998. Part 1. Studies on the chironomids collected throughout the year in the Shofuku Garden, near the mouth of Kurobe River, Toyama. Bulletin of Toyama Prefectural Environmental Science Research Center 25 (3): 14-69.
  • Saether O. A., Ashe P. & Murray D. A. 2000. A 6. Family Chironomidae. In: Papp L. & Darvas B. (eds) Contributions to a Manual of Palaearctic Diptera (with Special Reference to Flies of Economic Importance). Appendix: 113-334. Science Herald, Budapest.
  • Ashe P. & O'Connor J. P. 2012. A World Catalogue of Chironomidae (Diptera). Part 2 A, B. Orthocladiinae. Irish Biogeographical Society & National Museum of Ireland, Dublin.
  • Yamamoto M. & Yamamoto N. 2014. Family Chironomidae. In: The Editorial Committee of Catalogue of the Insect of Japan (ed.) Catalogue of the Insects of Japan, Vol. 8. Diptera (Part 1. Nematocera - Brachycera Aschiza): 237-362. Touka Shobo, Fukuoka, Japan. [In Japanese.]
  • Fu Y., Huang J., Liu W., Fang X. & Wang X. 2016. Redescription of 13 holotypes of Rheocricotopus Brundin, 1956 (Diptera: Chironomidae) from the Sino - Indian Region. Zootaxa 4114 (3): 261-276. https://doi.org/10.11646/zootaxa.4114.3.3
  • Brundin L. 1956. Zur Systematik der Orthocladiinae (Dipt. Chironomidae). Report from the Institute of Freshwater Research, Drottningholm 37: 5-185.