Pogaina sinensis Wang & Zhong, 2019
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publication ID |
https://doi.org/ 10.11646/zootaxa.4679.2.8 |
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publication LSID |
lsid:zoobank.org:pub:7003FACA-4634-40D8-B3FE-E38E7915B43E |
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DOI |
https://doi.org/10.5281/zenodo.3797697 |
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persistent identifier |
https://treatment.plazi.org/id/03D687C3-F96A-FFE1-FF7F-FA0DFAEDD72F |
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treatment provided by |
Plazi |
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scientific name |
Pogaina sinensis Wang & Zhong |
| status |
sp. nov. |
Pogaina sinensis Wang & Zhong n. sp.
( Figs. 1–2 View FIGURE 1 View FIGURE 2 )
Locality. Specimens were collected in brackish water (water temperature: 18–20°C, salinity: 17–21‰) near Shekou Port, Shenzhen Bay, Shenzhen City, Guangdong Province, China (113°54′49″E, 22°28′58″N) by L.H. Z during February and March of 2018.
Material examined. Holotype: PLA-Pr001, one whole-mounted specimen. Paratypes: PLA-Pr002–003, two whole-mounted specimens; PLA-Pr004-007, serially-sectioned (sagittal) specimens; PLA-Pr008, whole-mounted stylet.
Etymology. Species name refers to the country where it was discovered.
Description. The animal is 400–600 μm long (ẍ=500 μm; n=3) and 140–160 μm wide (ẍ=150 μm; n=3). The cylindrical-shaped individual is fast-moving, with a rounded anterior end and tapered posterior end ( Fig. 1A View FIGURE 1 ). The body is brownish-yellow, with symbiotic zooxanthellae distributed all over the body ( Fig. 1B View FIGURE 1 ). The barrel-shaped pharynx is 70–80 μm long (ẍ=75 μm; n=3) and 45–60 μm wide (ẍ=52 μm; n=3) ( Fig. 1B View FIGURE 1 , 2A View FIGURE 2 ).
A pair of ellipsoidal-shaped testes, measuring 150–200 μm in length (ẍ=175 μm; n=3) and 50–60 μm in width (ẍ=55 μm; n=3), are situated at the ventral side posterior to the pharynx ( Fig. 1B View FIGURE 1 , 2A View FIGURE 2 ). The spherical shaped seminal vesicle (60–70 μm in diameter, ẍ=65 μm; n=3) is located at midpoint of the body. It connects with a curved prostate vesicle, which together form an arc-like structure. The prostate vesicle is surrounded by the well-developed circular muscle and the posterior end connects to the stylet ( Fig. 1B View FIGURE 1 , 2 View FIGURE 2 A–B). The eosinophilic glands enter the prostate vesicle at the joint between prostate vesicle and seminal vesicle. The tubular-shaped stylet (70–80 μm long, ẍ=75 μm; 8–10 μm wide proximally, ẍ=9 μm; 3–5 μm wide distally, ẍ=4 μm; n=3) is located at male atrium and is slightly curved at the distal end ( Fig. 1 View FIGURE 1 B–F, 2A–C). A fusiform structure is present at 66% of the stylet, with a flange running through. The flange encircles the stylet, with its two ends attached to the midpoint and the distal end of the stylet. The gonopore is located at 66% of the body ( Fig. 2 View FIGURE 2 A–B).
Two vitellaria are situated dorsally at both sides of the body, extending from the pharynx to the posterior end ( Fig. 1B View FIGURE 1 , 2 View FIGURE 2 A–B). A pair of ellipsoidal-shaped ovaries is located ventrally at 66% of the body, with the length of 70– 90 μm (ẍ=80 μm; n=3) and the width of 40–50 μm (ẍ=45 μm; n=3) ( Fig. 1B View FIGURE 1 , 2 View FIGURE 2 A–B). The oviduct and vitelloduct run into a common duct ( Fig. 2B View FIGURE 2 ), in which the shell glands ( Fig. 2B View FIGURE 2 ) are present. The common duct is connected to the gonopore via a female canal ( Fig. 2 View FIGURE 2 A–B), where an enlarged structure filled with sperm is visible. The sphericalshaped seminal receptacle (70–80 μm in diameter, ẍ=75 μm; n=3) is filled with sperm ( Fig. 1 View FIGURE 1 A–B, 2A–B).
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.