Einfeldia Kieffer
Creators: name: Saether, Ole A.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Einfeldia

description: Key to Nearctic males of Einfeldia Kieffer, Benthalia Lipina and Chironomus subgen. Lobochironomus Ryser, Wülker et Scholl
1. Thorax and abdomen brown to blackish brown; frontal tubercles large, about twice as long as wide; LR1 1.7–2.2; haltere knob brown or pale........................................................................................ 2
- Thorax pale green with ochraceous to brownish-black markings, abdominal tergites uniformly green or mostly brown, frontal tubercles small to absent, LR1 1.3–1.7, haltere knob pale....................................................... 6
2. Anal point strongly spatulate, at least 1.8 times as wide at apex as at narrowest point; wing length greater than 2.1 mm; haltere knob brown or pale.................................................................................... 3
- Anal point only slightly spatulate, less than 1.5 times as wide at apex as at narrowest point; wing length less than 2.0 mm, haltere knob pale....................... Chironomus (Lobochironomus) austini Beck et Beck (Beck & Beck 1970 fig. 7g).
3. LR1 1.46–1.78, sensilla chaetica 3–10 in apical third of each of p2 and p3, several acrostichals, frontal tubercles moderately large............................................................................................... 4
- LR1 1.87–2.20, sensilla chaetica 23–31 in apical 2/3 of each of p2 and p3 (at least in B. brunneipennis), acrostichals few or absent, frontal tubercles very large....................................................................... 5
4. Superior volsella with the broad and flat apical part partly immersed in the basal part and its microtrichia (Fig. 8 C), LR1 1.7–1.78, dorsocentrals 16–30, tergite IX with 32–38 setae......................... Chironomus (Lobochironomus) sp.
- Superior volsella with apical part more narrow and less immersed in basal part, LR1 1.46–1.60, dorsocentrals 38–42, tergite IX with 3–13 setae................................................... Chironomus (Lobochironomus) mendax Storå
5. Basal part of superior volsella foot-shaped (Fig. 8 A, B), wing length 2.8–3.1 mm ............................................................................................... Benthalia brunneipennis (Johannsen) (Fig. 8 A, B).
- Basal part of superior volsella club-shaped (Sublette 1964 fig. 40, 41), wing length less than 2.7 mm ......................................................................... Benthalia natchitochea Sublette (Sublette 1964 fig. 40–41).
6. Basal abdominal tergite mostly brown, LR1 about 1.7................................................................................................... Chironomus (Lobochironomus) dorsalis (Meigen) (Townes 1945 fig. 127).
– Basal abdominal tergite uniformly green, LR1 1.3–1.6........................................................ 7
7. Anal point slightly spatulate and relatively narrow, Gonostylus not inflated, not abruptly constricted before apex........................................................................... E. chelonia Townes (Townes 1945 fig. 129).
- Anal point very broad, gonostylus inflated and abruptly constricted before apex............................................. Einfeldia pagana (Meigen) (Townes 1945 fig. 128; Oliver 1971 fig. 1–4 as E. synchrona Oliver, fig. 5 as E. pagana)
description: Published as part of Saether, Ole A., 2012, The Chironomus group (Diptera: Chironomidae) in Lake Winnipeg, Canada, pp. 1-19 in Zootaxa 3275 on pages 16-17, DOI: 10.5281/zenodo.280836