Cheliplana subproximalis Diez, Reygel & Artois, 2019

Gobert, Stefan, Diez, Yander L., Monnens, Marlies, Reygel, Patrick, Van Steenkiste, Niels W. L., Leander, Brian S. & Artois, Tom, 2021, A revision of the genus Cheliplana de Beauchamp, 1927 (Rhabdocoela: Schizorhynchia), with the description of six new species, Zootaxa 4970 (3), pp. 453-494 : 482-483

Cheliplana subproximalis Diez, Reygel & Artois, 2019

Material examined. None.

Known distribution. Bueycabón and Las Sardinas, Cuba ( Diez et al. 2019).

Remarks (summarised from literature). Live specimens are pinkish, translucent and rather small: The body length is 0.4–0.7 mm, as measured on whole mounts. The proboscis is armed with 13–18-µm-long, curved hooks. The muscular hook supports measure 5–8 µm. The pharynx measures 1/7 to 1/8 of the total body length in live specimens. The spiny prepharyngeal cavity is elongated, measuring twice as long as the pharynx. The mouth opens antero-ventrally and subterminally.

The single testis lies postero-laterally to the pharynx and connects to paired seminal vesicles. Distally, the two seminal vesicles fuse into a short, seminal duct, which opens into the copulatory bulb. Two proximal ducts of unknown origin enter the prostate vesicle near the entrance of the seminal duct. The 62–66-µm-long cirrus is armed with fine spines. Distally, the cirrus is slightly widened and surrounded by an asymmetric sclerotised cap (10–20 µm x 6–10 µm). Cirrus spines measure 2–3 µm in this region.

The vitellarium extends from the pharynx to the copulatory bulb. A single, kidney-shaped ovary is present. Oocytes occur in a row and proximally decrease in diameter. The bursa lies caudally from the common gonopore.