Tripylina puxianensis, Xu & Zhao & Wang & Zheng, 2013
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publication ID |
https://doi.org/ 10.11646/zootaxa.3630.3.10 |
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publication LSID |
lsid:zoobank.org:pub:18A0EAD9-2F9A-4618-A703-C2AF30093906 |
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persistent identifier |
https://treatment.plazi.org/id/03F7DA5F-FF81-2E6D-10BE-F9E7FABAFA2B |
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treatment provided by |
Felipe |
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scientific name |
Tripylina puxianensis |
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Description of Tripylina puxianensis n. sp.
( Figs 3 View FIGURE 3 , 4 View FIGURE 4 )
Measurements. Table 1.
Material examined. The description presented here is based on measurements of 13 paratypes, extracted from a soil and litter mixture, 0–15 cm depth, under a poplar tree ( Populus tremula L.), HouPoHe village, Puxian county , Shanxi province, North China (111 ° 19´29.12˝ N, 36 ° 18´22.80˝ E). Collected Yu Mei Xu, 30 iii, 2012 .
Holotype: National Nematode Collection of New Zealand ( NNCNZ), slide no. 280. Female . Paratypes: 12 females. NNCNZ, slide nos. 3150–3157 .
Description. Female. Body ventrally arcuate when fixed, posterior region more curved than anterior ( Fig. 3A View FIGURE 3 ). Cuticle smooth, cuticular thickness 0.6–1.5 µm at different body regions.
Head rounded, continuous with body contour. Six long and four short cephalic setae in a single whorl; six longer setae 11–14 µm long or 51–69% of head diameter, more or less arcuate and directed anteriorly; four shorter setae 4.2–6.8 µm or 20–32% of head diameter, thinner than the longer cephalic setae, more or less arcuate. Dorsal tooth conspicuous, triangular, pointing towards to ventral side, at 11–17 µm from anterior end, located 2.6–4.0 µm anterior to sub-ventral teeth ( Figs 3C View FIGURE 3 , 4A View FIGURE 4 ). Two sub-ventral teeth similar to dorsal tooth, triangular, pointing towards to dorsal side. Amphids cup-like, their opening 3.8–6.3 µm wide, located at 13–22 µm from anterior end of body ( Figs 3B, 3C View FIGURE 3 , 4A View FIGURE 4 ). Pharynx 179–228 µm long, occupying 16–18% of the body length. One ventromedian seta in cervical region, located at 47–73 µm or 23–37% of pharyngeal length from anterior end ( Figs 3E View FIGURE 3 , 4A View FIGURE 4 ).
Excretory pore not seen. Nerve ring 83–108 µm or 41–52% of pharyngeal length from anterior end of body. A prominent cardia, 20–27 µm long and 8.5–14 µm wide, located between the pharynx and intestine ( Fig. 4B View FIGURE 4 ).
Female genital system mono-prodelphic with no post-vulval sac ( Figs 3D View FIGURE 3 , 4C View FIGURE 4 ). Vulva-anus distance 305–425 µm long, being 4.1–7.5 times tail length. Body diameter 36–48 µm at vulva.
Vulva simple, lips protuberant, no sclerotized pieces seen in lateral view ( Fig. 4C View FIGURE 4 ). No distinct pre-rectum. Rectum length less than anal body diameter, 21–27 µm. Tail bent ventrad, a pair of subdorsal caudal setae on anterior part of tail ( Fig. 3F View FIGURE 3 ). Three tandem caudal glands ( Figs 3F View FIGURE 3 , 4D View FIGURE 4 ), a terminal spinneret, 1.4–2.9 µm long ( Figs 3F View FIGURE 3 , 4E View FIGURE 4 ).
Diagnosis and relationships. Tripylina puxianensis n. sp. is characterized by having a robust body. Dorsal tooth anterior to two sub-ventral teeth, triangular, pointing towards the ventral side. Two sub-ventral teeth are similar to the dorsal tooth in shapes and sizes. One ventromedian seta in the cervical region, and one pair of subdorsal setae on tail.
The genus Tripylina contains two groups of species, one with the dorsal tooth anterior to the sub-ventral teeth and one with the dorsal tooth posterior to the sub-ventral teeth ( Table 2). Tripylina puxianensis n. sp. belongs to the first group,with T. arenicola , T. ymyensis , T. ursulae and T. ixayocensis .
Sub-ventral teeth posterior to dorsal tooth arenicola 810–1250 20–30 4.7–6.8 13.1–18.3 1.9–3.2 62–69 1 single unknown de Man, 1880; Brzeski, 1963
ursulae 780–1170 22–36 4.8–5.7 13.6–27.2 – 61–67 1 single unknown Argo & Heyns
1973;Tsalolik hin 1983
ymyensis 1015 –1056 26–29 4.9–5.1 15.7–18.8 4.7–5.2 66–67 none 7 setae Tahseen &
Nusrat, 2010
ixayocensis 1300 –1600 30–38 5.5– 6.2 15–26 2.0–3.5 59–71 2 single 1 pair Cid del Prado-
Vera et al., 2012.
puxianensis n. sp. 1048–1331 26–34 5.5–6.2 14.4–23.1 2.1–3.5 56–69 1 single 1 pair This paper
* Brzeski and Winiszewska- Ś lipiṅska (1993) stated that although a single seta on the mid-ventral line anterior to nerve ring was originally described, it could not be seen when they re-examined the specimens.
Tripylina puxianensis n. sp. differs from T. arenicola by lacking vulval sclerotized pieces (present in the latter); the relative sizes of the dorsal tooth and sub-ventral teeth(similar sizes vs dorsal tooth larger than sub-ventral teeth)and the caudal setae (one pair vs absent).
Tripylina puxianensis n. sp. differs from T. ymyensis by having a ventromedian cervical seta (absent in the latter) and in the number of caudal setae (one pair vs 7 setae including two lateral pairs).
Tripylina puxianensis n. sp. differs from T. ursulae in body length (1048–1331 vs 780–1170 µm long); distance of the cervical seta from the anterior end (47–73 vs 22–28 µm); body diameter (36–48 vs 22–28 µm), caudal setae (one pair vs absent) and the shape of the vulval lips (with protruding vs non-protruding lips).
Tripylina puxianensis n. sp. differs from T. ixayocensis in body length (1048–1331 vs 1015–1056 µm); number of ventromedian cervical seta (one vs two), and the cardia size (20–27 µm long and 8.5–14 µm wide vs 15–20 µm long and 28–35 µm wide).
Based on the SSU and LSU molecular phylogenetic studies ( Figs 1 View FIGURE 1 & 2 View FIGURE 2 ), T. puxianensis n. sp. from China differs from all the Tripylina species with SSU and LSU sequences available in the GenBank. When compared with the molecular data for the most closely related species ( T. tearoha from New Zealand), there are 1% (3 in 946 bp) differences for SSU, and 3% (25 in 728 bp) differences for LSU between the two species.
Etymology. Species epithet named for the type locality. Puxian is a county of Shanxi province, China.
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Nationaal Herbarium Nederland, Leiden University branch |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.