Table 1.
Morphometric measurements of Cephalenchus driekieae n. sp. from South Africa.
| Female | ||
|---|---|---|
| Characters | Holotype | Paratypes |
| n | 1 | 8 |
| L | 456 | 483.5 ± 24.5 (451–526) |
| a | 36.5 | 34.8 ± 1.3 (33.3–36.5) |
| b | 7 | 7.3 ± 0.5 (6.8–8.0) |
| c | 4 | 4.3 ± 0.1 (4.1–4.5) |
| c´ | 12.2 | 13.6 ± 1.3 (11.5–15.0) |
| V | 65.8 | 64.8 ± 2.0 (60.5–67.0) |
| V´ | 86.5 | 83.0 ± 3.3 (75.5–86.5) |
| Lip region height | 2 | 2.4 ± 0.4 (2–3) |
| Lip region width | 5.5 | 6.0 ± 0.5 (5.5–7.0) |
| Stylet conus length | 5 | 5.4 ± 0.6 (4.4–6.3) |
| Stylet length | 12 | 12.0 ± 0.5 (11.5–13.0) |
| DGO | 1.8 | 1.3 ± 0.3 (1.0–1.8) |
| Median bulb valve to ant. end | 31 | 31.0 ± 0.5 (30–32) |
| MB% | 6.8 | 6.5 ± 0.3 (6–7) |
| Pharynx (stylet knobs to pharynx-intestinal junction) | 56 | 64.5 ± 5.0 (56–71) |
| Neck (anterior end to pharynx-intestinal junction) | 70 | 65 ± 3 (61–70) |
| Excretory pore – ant. end | – | 61.5 ± 3.0 (57–65) |
| Hemizonid – ant. end. | 49 | 58 ± 5 (49–62) |
| Anterior end to vulva | 300 | 313 ± 22 (280–353) |
| – to anus | 346 | 372 ± 20 (344–393) |
| Body width at median bulb | 11 | 12.0 ± 0.5 (11–13) |
| – at vulva | 12.5 | 14 ± 1 (12.5–15.5) |
| – at anus | 9 | 8.5 ± 1.0 (7.5–10.0) |
| Post-vulval uterine sac length | 13 | 13.5 ± 0.5 (13–14) |
| Tail length | 110 | 111.0 ± 3.5 (105–116) |
Figure 1:
Line drawings of Cephalenchus driekieae n. sp. from South Africa, female. (A) Entire body; (B) anterior region; (C) pharyngeal region; (D) reproductive system; (E) tail.
Figure 2:
Light micrographs of Cephalenchus driekieae n. sp. from South Africa, female. (A) Entire body; (B) pharyngeal region; (C) lateral lines; (D) part of reproduction system; (E) anterior region; (F) pharyngeal overlap; (G) tail; (H) tail terminus. (Scale bars = 10 µm).
Figure 3:
Scanning electron microscopy of Cephalenchus driekieae n. sp. from South Africa, female. (A) Anterior region; (B) lip region; (C) posterior body region; (D, E) vulval region in lateral and ventral view; (F) anus and lateral lines in anus region.
Figure 4:
Bayesian 50% majority rule consensus tree inferred from small subunit (SSU) rDNA gene sequence of Cephalenchus driekieae n. sp. from South Africa under GTR + I + G model (lnL = 6,436.7202; freqA = 0.2443; freqC = 0.2268; freqG = 0.2864; freqT = 0.2425; rAC = 1.0699; rAG = 2.8891; rAT = 1.2180; rCG = 1.1273; rCT = 5.8691; Pinv = 0.4073; Alpha = 0.6044). Bayesian posterior probability (BPP) values >0.50 are given for appropriate clades. The sequence of the new species is indicated by bold font.
Figure 5:
Bayesian 50% majority rule consensus tree inferred from D2-D3 expansion segments of large subunit (LSU) rDNA gene sequence of Cephalenchus driekieae n. sp. from South Africa under GTR + I + G model (lnL = 7,632.2964; freqA = 0.1794; freqC = 0.2463; freqG = 0.3573; freqT = 0.2170; rAC = 0.9583; rAG = 2.6626; rAT = 1.2424; rCG = 0.6711; rCT = 5.4981; Pinv = 0.2528; Alpha = 0.6707). Bayesian posterior probability (BPP) values >0.50 are given for appropriate clades. The sequence of the new species is indicated by bold font.