Zavrelia, Kieffer & Bause, 1913

Namayandeh, Armin, Hudson, Patrick L., Ghaderi, Edris & Stott, Wendylee, 2023, Zavrelia parapentatoma (Chironomidae: Diptera), a curious new species from North America, revealed by molecular methods, Zootaxa 5249 (1), pp. 111-124 : 121

Key to the known larvae of Zavrelia

1. AAR ≥ 1.2.......................................................................................... 2

- AAR ≤ 1............................................................................................ 3

2. Inner margin of mandible with two spines. First antennal segment 66 μm long. Antennal blade <100 μm long ( Ekrem & Stur 2009: Figs. 11D, G)................................................................. Z. sinica Ekrem & Stur

- Inner margin of mandible smooth. The first antennal segment 55 μm long. Antennal blade> 100 μm long................................................................................................ Z. hudsoni Ekrem & Stur

3. Antennal pedestal ≥ 80 μm long.......................................................................... 4

- Antennal pedestal <80 μm long.......................................................................... 5

4. Inner margin of mandible with one spine. Lauterborn organs prominent with second Lauterborn organ ≥ 30 μm long ( Zorina, 2008: Figs. 8, 11)......................................................................... Z. elenae Zorina

- Inner margin of mandible with two spines. Lauterborn organs less prominent with second Lauterborn organ <30 μm long ( Zorina, 2008: Figs. 21, 23)........................................................ Z. pseudopentatoma Zorina

5. First antennal segment 65–70 μm long. Antennal blade 125–150 μm long; AAR about 1.0 ( Ekrem & Stur 2009: Fig. 2D ).................................................................................... Z. aristate Ekrem & Stur

- First antennal segment> 70 μm long. Antennal blade <120 μm long; AAR <1.0................................... 6

6. Ventromental plates extend to the third lateral teeth of the mentum. Lauterborn organ 15 μm long ( Ekrem & Stur 2009: Figs. 2D–E ). The shortest anal setae, close to 120 μm long.................................. Z. pentatoma Kieffer & Bause

- Ventromental plates extend to the border of second and third lateral teeth of the mentum. Lauterborn organ 17–26 μm long (Figs.) The shortest anal setae, close to 380 μm long...................................... Z. parapentatoma sp. nov.

Figures

FIGURE 2. Histogram of genetic distance estimates from ABGD (Automatic Barcode Gap Discovery) for a partition analysis of 19 cytochrome oxidase subunit1 sequences of the Zavrelia and Stempellinella species. nbr = number of runs.