Campylaimus orientalis, Fadeeva, Natalia, Mordukhovich, Vladimir & Zograf, Julia, 2016
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publication ID |
https://doi.org/ 10.11646/zootaxa.4107.2.5 |
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publication LSID |
lsid:zoobank.org:pub:CCEEDDAD-C07F-4F35-8196-56A3804755D9 |
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DOI |
https://doi.org/10.5281/zenodo.6086694 |
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persistent identifier |
https://treatment.plazi.org/id/0D0F8782-AB1A-FFC2-0BCF-FB5BFE90B295 |
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treatment provided by |
Plazi |
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scientific name |
Campylaimus orientalis |
| status |
sp. nov. |
Campylaimus orientalis sp. nov.
( Figs 2–4 View FIGURE 2 View FIGURE 3 View FIGURE 4 )
Locality: Table 1 View TABLE 1 .
Measurements. Table 2 View TABLE 2 .
Material examined. Holotype. Adult male, formalin-fixed, mounted on slide (MN A374-3), in glycerin. Allotype. Adult female, formalin-fixed, mounted on slide (MN A372-2), in glycerin. Paratypes. Male, slides (A371-23) and female (A373-3), same data as holotype.
Etymology. The species name is derived from the Latin “ orientalis ”, meaning “eastern”.
Description. Spindle-shaped plump nematodes with clearly annulated cuticle (ring height 2.0 µm), extending from the oral opening to the terminal part of the tail ( Figs 2 View FIGURE 2 , 3 View FIGURE 3 A, 3B). Anterior end with a clearly visible cuticular cap ( Fig. 4 View FIGURE 4 D). Oral opening small, rhomboid, displaced on dorsal side of body. Buccal cavity unarmed. Inner labial papillae and outer labial setae not seen. Four short (2.5–3 µm) cephalic setae asymmetrically placed: latero-dorsal pair of short setae is located a little posterior to latero-ventral pair ( Fig. 3 View FIGURE 3 С).
Amphids well developed, comprising 2 parallel limbs connected posterior to the oral opening; dorsal limb somewhat shorter (32–40 µm) than ventral (37–43 µm). Amphids with wide gap between limbs ( Fig. 3 View FIGURE 3 C). Prominent narrow longitudinal alae extend along body to posterior end, arising immediately from ventral (long) limb of the amphid ( Fig. 3 View FIGURE 3 A).
Pharynx cylindrical for most of its length, muscular, gradually widening to the base with developed cardia. Nerve ring surrounding posterior part of pharynx. Cardia short, embedded in intestine.
Tail conico-cylindrical, 123–135 µm long (4.6–5.9 a.b.d), gradually tapering toward the distal end, tip swollen, similar in shape in both sexes ( Figs 2 View FIGURE 2 , 3 View FIGURE 3 B).
Males with two testes, anterior testis situated left, posterior testis right of the intestine. Spicules equal in length, arcuate with cephalated proximal end. Gubernaculum tubular, 7 µm long. Two pairs of small postcloacal setae; first pair 4 µm long, situated 63 µm posterior to cloacal opening; second pair 90 µm posterior to cloacal opening ( Figs 2 View FIGURE 2 , 4 View FIGURE 4 B–C).
Females similar to male. Gonads paired, opposed; ovaries outstretched, non-reflexed. Anterior and posterior ovaries on left and right side of intestine, respectively. Vulval orifice ventral; vagina short, not thickened. Postcloacal setae absent. Two glands surrounding the vulva.
Diagnosis. Campylaimus orientalis sp. nov. is characterized by being spindle-shaped, having moderate body, cuticle with clear annulations, small rhomboid oral opening displaced on the dorsal side of the body, amphid with unequal limbs, prominent narrow longitudinal alae, spicules with a cephalated proximal end, and tubular gubernaculum.
Differential diagnosis. Based on the amphid structure, C. orientalis sp. nov. is similar to two congeners: C. mirus Gerlach, 1950 and C. rimatus Vitiello, 1974 , that are characterized by the prominent narrow longitudinal alae passing immediately from ventral limb of amphid along the body to the posterior end.
The specimens of C. orientalis sp. nov. differ from C. rimatus by the presence of a tubular gubernaculum (vs absent in C. rimatus ) and index c (5–6 vs 7–8, respectively). Campylaimus orientalis sp. nov. differs from C. mirus in numerous respects, including the amphid shape, long cardia embedded in the intestine (vs short in C. mirus ) and by having cephalated spicules (vs non-cephalated in C. mirus ) and a relatively broader body (а = 19–20 vs 42, respectively).
TABLE 2. Measurements (Μm) of Campylaimus orientalis sp. nov. (range).
| HOLOTYPE | ALLOTYPE | PARATYPES | PARATYPES |
|---|---|---|---|
| Male | Female | Male N=1 | Female N=2 |
| L 725.0 | 690.0 | 680.0 | 608.0–854.0 |
| Maximum body diameter 38.0 | 37.0 | 40.0 | 30.7–55.0 |
| Buccal cavity, length 4.0 | 4.0 | 4.0 | 4.0 |
| Head diameter 9.0 | 9.0 | 9.0 | 7.0–9.0 |
| Cephalic setae, length 3.0 | 3.0 | 3.0 | 2.0–3.0 |
| Dorsal limb of amph. fovea 37.0 | 32.4 | 40.0 | 35.0–42.0 |
| Ventral limb of amph. fovea 38.0 | 37.7 | 43.0 | 39.00–50.0 |
| Amphidial fovea width 4 | 4.0 | 4 | 3 0–4.0 |
| Lateral alae 2.6 | 2.6 | 2.6 | 2.0–2.0 |
| Pharynx, length 128.8 | 140.0 | 120.0 | 105.0–160.0 |
| Tail, length 123.2 | 130.0 | 128.0 | 135.0–121.0 |
| Spicular, length 27.0 | - | 29.0 | |
| Anal body diameter 27.0 | 28.0 | 28.0 | 23.0–28.9 |
| Gubernaculum, length 7.0 | - | 7.0 | |
| a 19.8 | 18.7 | 18.9 | 15.5–20.2 |
| b 5.6 | 5.7 | 5.7 | 5.3–5.7 |
| c | 5.3 | 5.3 | 4.5–7.0 |
| V, % | 49.0 | 44.0–54.0 |
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