Pseudominona cancan Curini-Galletti, 2019

Curini-Galletti, Marco, Stocchino, Giacinta A. & Norenburg, Jon L., 2019, New species of Duplominona Karling, 1966 and Pseudominona Karling, 1978 (Platyhelminthes: Proseriata) from the Caribbean, Zootaxa 4657 (1), pp. 127-147 : 141-142

publication ID

https://doi.org/ 10.11646/zootaxa.4657.1.5

publication LSID

lsid:zoobank.org:pub:870BAA65-AF5B-4B5F-AB1D-882E6DBB6E8D

DOI

https://doi.org/10.5281/zenodo.5941627

persistent identifier

https://treatment.plazi.org/id/9D2887E2-FFAD-FF8D-FF47-F957204CFAE2

treatment provided by

Plazi

scientific name

Pseudominona cancan Curini-Galletti
status

sp. nov.

Pseudominona cancan Curini-Galletti n. sp.

( Fig. 8 View FIGURE 8 )

Holotype. Panama: Portobelo , Bahia Can Can (Lat. 9.517535, Lon. -79.687392), about 50 cm deep among seagrass, in mixed sediment, March 2016; one specimen sagittally sectioned ( USNM 1569257 About USNM ).

Paratype. Same data as holotype, two specimens sagittally sectioned ( USNM 1569258–1569259 About USNM ) .

Other material. Same data as holotype, three specimens studied karyologically.

Panama: Bocas del Toro (Lat. 9.352219, Lon. -82.255574). Sheltered beach in front of the Smithsonian Tropical Research Institute , intertidal in medium sand. June 2010; one specimen studied alive .

Etymology. The species is named after the type locality— cancan is a noun used in apposition.

Description. Animals small, about 1.5 mm long, unpigmented, with the caudal region tripartite, provide with numerous adhesive glands ( Fig. 8 View FIGURE 8 A–C). Rhabdoids rod-shaped, about 5–7 μm long. Statocyst surrounded by nuclei of the brain cells, and abutting the neuropil. With a short pharynx at about mid-body. Oesophagus less than 1/5 the total length of pharynx.

Male genital system. With about 20 testes in two more or less regular rows in front of pharynx ( Fig. 8 A, B View FIGURE 8 ). With a copulatory organ about 50 μm long and 40 μm high in sections, provided with a thin outer muscular layer, about 1 μm thick. With a nearly spherical seminal vesicle, separated by a muscular septum from a well-developed prostatic vesicle ( Fig. 8 E, G View FIGURE 8 ). Cirrus short, 25–30 μm long, provided with 10–15 rows of acutely triangular spines, 3–5 μm long, progressively increasing in size distally ( Fig. 8 D View FIGURE 8 ).

With an ovoid accessory organ, 20–25 μm across, lined by a muscular coating 2.5 μm thick, and provided with a slender stylet about 22 μm long. The accessory organ opens to the outside through an own pore, just posterior to the male pore ( Fig. 8 E, G View FIGURE 8 ).

Female genital system. Ovaria immediately postpharyngeal. The short oviducts enter a small roundish copulatory bursa ( Fig. 8 F View FIGURE 8 ), connected to a vaginal duct that runs ventrally and opens close to mouth through the vagina. The female duct widens in front of the copulatory organ, and is surrounded by vacuoles containing sperm in various stages of degradation. The female duct opens to the outside posterior to the accessory organ pore ( Fig. 8 G View FIGURE 8 ).

Diagnosis. Species of Pseudominona with tripartite tail. With a short cirrus, with 10–15 rows of acutely triangular spines, 3–5 μm long. With a small bursa in front of the copulatory organ, and an external vagina close to mouth. With a prostatoid organ provided with a slender stylet 22 μm long. Pore indices: a:b:c:d = 1: 14: 2: 4.

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