Eukiefferiella Thienemann, 1926

Chamutiová, Tímea, Hamerlík, Ladislav & Bitušík, Peter, 2020, Subfossil chironomids (Diptera, Chironomidae) of lakes in the Tatra Mountains an illustrated guide, Zootaxa 4819 (2), pp. 216-264 : 235

publication ID	https://doi.org/10.11646/zootaxa.4819.2.2
publication LSID	lsid:zoobank.org:pub:2459A542-6CF2-4545-9E6F-262C68838D99
DOI	https://doi.org/10.5281/zenodo.4396886
persistent identifier	https://treatment.plazi.org/id/03F487F1-FFAE-FFB7-FF22-FD94ABD5FA28
treatment provided by	Plazi (2020-12-29 00:20:21, last updated 2024-11-25 23:27:53)
scientific name	Eukiefferiella Thienemann
status

Treatment

Eukiefferiella Thienemann View in CoL ( Figs 43–46 View FIGURES 43–48 )

Head capsule narrow, yellow to dark brown. Occipital margin darkened, broad. Antenna with 4–5 segments, premandible broad with one apical tooth. Mandible with 3–4 inner teeth, apical tooth shorter than combined width of inner teeth; mola with 1–5 spines. Mentum striped, with 1 or 2 median and 4–5 lateral teeth. Ventromental plates are narrow, creating an appearance of a dark triangle below the last lateral tooth of mentum.

Remarks: Eukiefferiella is very similar to Tvetenia and the most reliable character separating their subfossils is the position of setae submenti that are close to the base of the mentum in Eukiefferiella but well below the mentum in Tvetenia . Moreover, head capsule of Tvetenia is usually pale, while head capsule of Eukiefferiella is light brown to dark brown ( Schmid 1993).

Eukiefferiella claripennis (Lundbeck, 1898) View in CoL , E. coerulescens (Kieffer, 1926) View in CoL , E. minor (Edwards, 1929) View in CoL / fittkaui Lehmann, 1972 View in CoL and E. brevicalcar (Kieffer, 1911) View in CoL / tirolensis Goetghebuer, 1938 have been so far recorded in the Tatra Mts. lakes ( Bitušík 2004; Novikmec et al. 2015).

Subfossil remains occurred relatively frequently in lakes situated at lower altitudes, especially in lakes with strong inlet stream.

Four morphotypes were distinguished.

Key to morphotypes:

1 Mentum with single median tooth........................................................................ 2

- Mentum with bifid median tooth................................................ Eukiefferiella claripennis View in CoL - type B

2 Mentum with 4 lateral teeth....................................................... Eukiefferiella devonica View in CoL - type

- Mentum with 5 lateral teeth............................................................................. 3

3 Median mental tooth relativelly narrow, about 2x as broad as first lateral tooth............. Eukiefferiella brevicalcar View in CoL - type

- Median mental tooth broad, more than 3x as broad as first lateral tooth....................... Eukiefferiella fittkaui View in CoL - type

References

Bitusik, P. (2004) Chironomids (Diptera. Chironomidae) of the mountain lakes in the Tatra Mts. (Slovakia). A review. Dipterologica bohemoslovaca 12, Acta Facultatis Ecologiae, Zvolen, 12 (1), 25 - 53.

Novikmec, M., Veselska, M., Bitusik, P., Hamerlik, L., Matusova, Z., Klementova, B. R. & Svitok, M. (2015) Checklist of ben- thic macroinvertebrates of high altitude ponds of the Tatra Mountains (Central Europe) with new records of two species for Slovakia. Check List, 11 (1), 1522. https: // doi. org / 10.15560 / 11.1.1522

Schmid, P. E. (1993) A key to the larval Chironomidae and their instars from Austrian Danube Region streams and rivers. With particular reference to a numerical taxonomic approach. Part I. Diamesinae, Prodiamesinae and Orthocladiinae. Wasser und Abwasser, 3, 1 - 514.

Figures

FIGURES 43–48. Eukiefferiella brevicalcar-type: 43—head capsule. Eukiefferiella claripennis-type B: 44—head capsule. Eukiefferiella devonica-type: 45—head capsule. Eukiefferiella fittkaui-type: 46—head capsule. Gymnometriocnemus/Bryophaenocladius: 47 (arrow indicates ventromental plate). Heterotrissocladius marcidus-type: 48—antenna.