Mylonchulus mulveyi Jairajpuri, 1970
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publication ID |
https://doi.org/ 10.11646/zootaxa.3635.3.2 |
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publication LSID |
lsid:zoobank.org:pub:2FD4024A-6AEF-4B71-9377-695AD5C391AD |
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DOI |
https://doi.org/10.5281/zenodo.5619636 |
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persistent identifier |
https://treatment.plazi.org/id/996AF548-F13F-FFBA-FF00-90EEFC469BC3 |
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treatment provided by |
Plazi |
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scientific name |
Mylonchulus mulveyi Jairajpuri, 1970 |
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Mylonchulus mulveyi Jairajpuri, 1970
( Fig. 4A–F View FIGURE 4. A – F )
= Paramylonchulus mulveyi (Khan & Jairajpuri, 1979) Jairajpuri & Khan, 1982
Measurements: Table 3 View TABLE 3 .
Female: Buccal cavity conical with narrow base, 1.8–2.0 times as long as wide; dorsal tooth apex at 71–85% from the base of stoma; ventro-sublateral walls with four transverse rows of denticles; subventral teeth absent. Amphidial aperture at level with middle of dorsal tooth. Female genital system mono-prodelphic; posterior branch completely absent. Sphincter at oviduct-uterus junction well developed. Vulva transverse; vagina thick-walled extending inward about two-fifths of the corresponding body width; pars proximalis vaginae 7–9 μm long, conical in shape; pars refringens vaginae slender, teardrop-shaped in appearance, each measuring 2×1 μm, cw 2 μm; pars distalis vaginae 2 μm with concave walls. Tail elongated conoid, about 1.8–2.0 times anal body width long, gradually narrowing with a ventral curvature, tail tip strongly narrowing with slight dorsal slant. Caudal glands well developed, grouped; spinneret terminal.
Male: Not found.
Habitat and locality: Soil around the roots of forest trees from Mukkali, Silent Valley National Park, Palakkat, Kerala State, India.
Remarks: Jairajpuri (1970) described this species as Mylonchulus mulveyi . Later, Jairajpuri and Khan (1982) transferred it to their newly proposed genus Paramylonchulus . This species has also been recorded from El Salvador (Baqri & Jairajpuri, 1974), St. Lucia (Hunt, 1978) and Japan (Olia et al., 2009). Ahmad and Jairajpuri (1979) recorded a single male for this species. The systematic position of this species and other Mylonchulus species with buccal cavity lacking subventral teeth and mono-prodelphic female genital system has been a matter of discussion for the last 2–3 decades (Andrássy, 1993; Loof, 1993; Rahman & Jairajpuri, 1984; Popovici, 1990; Dhanachand et al., 1995; Annandi et al., 1997, Olia et al., 2009) and finally, with the finding of Mylonchulus monohystera Ahmad et al., 2010 this controversy has ended and the genus Paramylonchulus with all its species has been recognized as a synonym of the genus Mylonchulus . The present population of M. mulveyi from Sillent Valley National Park conforms well to the original description with no significant differences.
Mylonchulus paraindex Ahmad, Baniyamuddin and Jairajpuri, 2005 ( Fig. 4 View FIGURE 4. A – F G–I)
= Paramylonchulus paraindex (Ahmad et al., 2005) Ahmad and Jairajpuri, 2010
Measurements: Table 3 View TABLE 3 .
Female: Buccal cavity conical with narrow base, 1.9–2.0 times as long as wide; dorsal tooth apex at 75–84% from the base of stoma; ventro-sublateral walls with six transverse rows of denticles, subventral teeth absent. Amphidial aperture at level with the apex of dorsal tooth. Female genital system mono-prodelphic; posterior branch represented by a very short sac. Sphincter at oviduct-uterus junction poorly developed; uterine egg measuring 84–86×30–32 μm. Vulva transverse; vagina thick-walled extending inward about one-third of the corresponding body width; pars proximalis vaginae 6 μm long with parallel walls; pars refringens vaginae with two drop-shaped sclerotization, each measuring 3×1 μm, cw 5 μm; pars distalis vaginae 1–1.5 μm. Tail suddenly narrowing forming a posterior ventrally curved digitate part, about 1.2–1.4 anal body widths long. Caudal glands well developed, grouped; spinneret terminal with a slight subdorsal slant.
Habitat and locality: Soil around the roots of forest trees from Mukkali, Silent Valley National Park, Palakkat, Kerala State, India.
Remarks: Ahmed et al. (2005) described M. paraindex from Singapore. Ahmad and Jairajpuri (2010) transferred it to Paramylonchulus , while here it is now being returned back to its original status. In the original description, the position of the amphid aperture was reported as being near base of lips while in the present population the amphid aperture is near the dorsal tooth apex or even slightly lower than that. We restudied the paratypes of M. paraindex available in the nematode collection of Zoology department, Aligarh Muslim University and it was found that even in the paratypes the amphid position is same as in the present population. The present specimens further fully correspond with the original description, however, slight differences were recorded in tail length (vs tail 35–36 μm, c= 20–25 in type population).
TABLE 3. Mylonchulus mulveyi and Mylonchulus paraindex. All measurements in µm.
| Mylonchulus mulveyi | Mylonchulus paraindex | |
|---|---|---|
| Characters | Females | Females |
| N | 3 | 4 |
| L | 924±81.7 (814–1009) | 886±21 (851–906) |
| Body width at neck base | 28.7±7.03 (21–38) | 29.7±0.43 (29–30) |
| Body width at mid body | 28±2.8 (24–30) | 32±1.87(30–35) |
| Body width at anus | 21±2.2 (18–23) | 24.2±0.82 (23–25) |
| a | 33±0.98 (31.7–33.91) | 27.7±138 (25.9–29.7) |
| b | 3.1±0.16 (2.96–3.3) | 3.1±0.02 (3.08–3.14) |
| c | 22.8±0.8 (21.9–23.9) | 27.4±2.5 (24.3–30.8) |
| c` | 1.9±0.05 (1.9–2.0) | 1.3±0.08 (1.2–1.4) |
| V | 73.9±2.41 (71–77) | 71±1.7 (68–72) |
| G1 G2 Lip region width | 15±2.05 (13–18) _ 16.3±1.24 (15–18) | 16.1±1.8 (14.8–19.2) _ 16.2±0.43 (16–17) |
| Lip region height | 6.3±0.47 (6–7) | 4.7±0.43 (4–5) |
| Amphid aperture | _ | |
| Buccal cavity length | 19.6±1.24 (18–21) | 19.2±0.43 (19–20) |
| Buccal cavity width | 10.3±0.5 (10–11) | 10±0 |
| Position of dorsal tooth from base of stoma | 15.3±1.24 (14–17) | 15.2±0.43 (15–16) |
| Nerve ring from anterior end | 84±9.62 (74–97) | 83±1.87 (80–85) |
| Pharynx length | 301±28 (275–340) | 284±6.7 (275–294) |
| Cardia length | 12±0.8 (11–13) | 12.7±0.8 (12–14) |
| Anterior genital branch | 140±29 (114–181) | 143±17.9 (132–174) |
| Posterior genital branch | 5.66±1.7 (4–8) | 6.5±1.8 (4–9) |
| Vaginal length | 11.3±0.47 (11–12) | 9±0.7 (8–10) |
| Vulva from anterior end | 682±46 (628–741) | 629±20.16 (607–652) |
| Rectum length | 15.3±3.7 (11–20) | 17.7±2.27 (15–20) |
| Tail length | 40.7±4.9 (34–46) | 32.5±2.59 (29–35) |
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