Tajikacelis acuta, Curini-Galletti & Schockaert, 2021

Curini-Galletti, Marco & Schockaert, Ernest R., 2021, Six new species ofArchimonocelididae Meixner, 1938 (Platyhelminthes, Proseriata) from the Pacific, with proposal of a new genus, Zootaxa 4965 (3), pp. 515-528 : 521

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Tajikacelis acuta

n. sp.

Tajikacelis acuta n. sp.

( Figs 1E View FIGURE 1 , 2E View FIGURE 2 , 6 View FIGURE 6 , 10E View FIGURE 10 )

Diagnosis. Species of Tajikacelis with a slightly recurved stylet, 37–41 μm long (N=2), with a straight proximal opening 16–17 μm wide, with a slit-like oblique terminal opening and ending into a sharp point. With elongate seminal vesicles. Six testes in a row in front the ovaries. Neither widened female duct nor a vagina were seen in the living the animal.

Occurrence. Gulf of Panama, off Isla Pacheca (Las Perlas Is., Panama) (8°40’22.87”N; 79° 3’12.58”W), about 20 m deep, coarse sand with shell fragments (type locality) (December 2011 by M.C-G) GoogleMaps .

Material studied. Two whole mounts, one of them designated as holotype ( FNMH http://id.luomus.fi/KV.667), the other as paratype ( CZM830 ). Micrographs of the living animal .

Etymology. the species name refers to its sharply pointed stylet.

Additional remarks. Dark, roundish pigmented areas are present over the whole body, particularly apparent in the head region ( Fig. 6 B View FIGURE 6 ). The species is cited as Archimonocelididae gen. n. 2 sp. n. 1 and Archimonocelididae gen. n. 2 sp. 3 in Scarpa et al. (2017) .