taxonID	type	description	language	source
6C4586BDC8AB725D09D9D5C39157F1DA.taxon	etymology	Etymology. The specific name is a noun in the genitive case and taken from the TRV Seisui-maru.	en	Oya, Yuki, Kimura, Taeko, Kajihara, Hiroshi (2019): Description of a new species of Paraplehnia (Polycladida, Stylochoidea) from Japan, with inference on the phylogenetic position of Plehniidae. ZooKeys 864: 1-13, DOI: http://dx.doi.org/10.3897/zookeys.864.33955, URL: http://dx.doi.org/10.3897/zookeys.864.33955
6C4586BDC8AB725D09D9D5C39157F1DA.taxon	materials_examined	Material examined. One specimen: holotype, ICHUM 5345, 44 slides (14 slides for the anterior part and 30 slides for the posterior part of the body), dredged from 298 - 310 m depths, the Sea of Kumano, between 34 ° 08.0 ' N, 136 ° 37.8 ' E to 34 ° 07.8 ' N, 136 ° 37.9 ' E, Japan.	en	Oya, Yuki, Kimura, Taeko, Kajihara, Hiroshi (2019): Description of a new species of Paraplehnia (Polycladida, Stylochoidea) from Japan, with inference on the phylogenetic position of Plehniidae. ZooKeys 864: 1-13, DOI: http://dx.doi.org/10.3897/zookeys.864.33955, URL: http://dx.doi.org/10.3897/zookeys.864.33955
6C4586BDC8AB725D09D9D5C39157F1DA.taxon	description	Description. Live specimen 26 mm in length, 11 mm in width. Body thick, elongate, oval, narrow toward posterior end (Fig. 1 A, B). Anterior and posterior ends pointed. Body ground color translucent to whitish opaque. General appearance of body light brown. Dorsal body without any pattern. Body margin translucent. Tentacles lacking. Pharynx, ruffled in shape, 7.4 mm in length, located at center of body. Mouth opening at center of pharyngeal cavity (Fig. 1 B). Intestine highly branched and not anastomosing, spreading throughout body except margin. Pair of sperm ducts and oviducts whitish, visible through ventral surface. Male and female gonopores separate; male gonopore opening at 9 mm from posterior end; female gonopore situated 2.5 mm posterior to male gonopore. Marginal and cerebral eyespots small and embedded in parenchyma (Fig. 1 C, D). At least 47 and 28 eyespots arranged in anterior body margin and from just behind brain to anterior to brain, respectively, but detailed distribution of eyespots could not be observed. Male copulatory apparatus located posteriorly to pharynx, consisting of pair of spermiducal bulbs, prostatic vesicle, and penis papilla (Fig. 2 A-E). Distal end of each sperm duct forming oval spermiducal bulb, latter having thick muscular wall (Fig. 2 A). Distal end of each spermiducal bulb slender and separately connecting to neck of prostatic vesicle (Fig. 2 B-D). Prostatic vesicle pear-shaped, having strong muscular wall occupying its proximal one-third, distally coated with connective tissue and enclosed by muscular bulb (Fig. 2 F). Canals of extra-vesicular gland penetrating prostatic-vesicle wall. Glandular epithelium with numerous teardrop-shaped cells folded in prostatic vesicle. Ejaculatory duct lacking; distal end of prostatic vesicle directly forming a part of penis papilla. Penis papilla large, conical, and projecting posteriorly into male atrium. Male atrium lined with thin, non-ciliated epithelium. Pair of oviducts forming common oviduct, which run postero-dorsally to enter vagina (Fig. 2 E). From this point, elongated duct of Lang's vesicle, lined with ciliated epithelium, running posteriorly. Lang's vesicle sac-shaped, lined with squamous cells, positioned posterior to female gonopore. Vagina lined with smooth ciliated epithelium, running antero-dorsally, curving postero-ventrally as it becomes slenderer, turning postero-dorsally as it becomes wider, eventually leading ventrally to exit at female atrium (or vagina externa). Medial part of vagina surrounded by numerous cement glands (Fig. 2 E). Female atrium large, folded, with thick basement membrane opening at female gonopore. Genital pit with smooth epithelium and basement membrane similar to those in vagina (Fig. 2 G), located between male and female gonopores (Fig. 2 F, H).	en	Oya, Yuki, Kimura, Taeko, Kajihara, Hiroshi (2019): Description of a new species of Paraplehnia (Polycladida, Stylochoidea) from Japan, with inference on the phylogenetic position of Plehniidae. ZooKeys 864: 1-13, DOI: http://dx.doi.org/10.3897/zookeys.864.33955, URL: http://dx.doi.org/10.3897/zookeys.864.33955
