Proschizorhynchella shuttlecock, Takeda & Kajihara, 2018

Takeda, Naoya & Kajihara, Hiroshi, 2018, A New Genus and Five New Species of Kalyptorhynchia (Platyhelminthes: Rhabdocoela) Discovered in Northern Japan, Species Diversity 23 (1), pp. 1-11 : 10-11

publication ID

https://doi.org/ 10.12782/specdiv.23.1

publication LSID

lsid:zoobank.org:pub:A9B333A2-FD81-476A-A805-D280C2194964

DOI

https://doi.org/10.5281/zenodo.5527062

persistent identifier

https://treatment.plazi.org/id/9E377278-5C0E-4AE3-9FBD-E3EA28A941DB

taxon LSID

lsid:zoobank.org:act:9E377278-5C0E-4AE3-9FBD-E3EA28A941DB

treatment provided by

Felipe

scientific name

Proschizorhynchella shuttlecock
status

sp. nov.

Proschizorhynchella shuttlecock View in CoL sp. nov.

( Figs 15 View Fig , 16 View Fig ; Table 1 View Table 1 )

Material examined. Holotype: ICHUM 4846 View Materials , adult, whole mount, 44°03′03″N, 141°39′46″E, Obira , Hokkaido, Japan, intertidal sand, 25 May 2012 GoogleMaps . Paratypes: ICHUM 4845, adult, whole mount, 45°29′16″N, 141°58′05″E, Soya, Hokkaido, Japan, intertidal sand, 26 May 2012; ICHUM 4847, 4848, two adults, whole mounts, same data as holotype.

Description. Living animal body approximately 2.6 mm long, 0.6 mm wide. Proboscis 600 µm long, 100 µm wide; pair of proboscis glands 170 µm long, 110 µm wide ( Fig. 15 View Fig A–C). Pair of black eyes situated behind proboscis ( Fig. 15 View Fig A–C). Two testes, each 200–290 µm in diameter ( Fig. 15A, B View Fig ). Pharynx typical for genus, 300 µm long, 400 µm wide ( Fig. 15A, B View Fig ). No adhesive girdles ( Fig. 15A, B View Fig ). Pair of seminal vesicles, each 410–470 µm long, 30–40 µm wide, located posterior to pharynx ( Fig. 15A View Fig ). Stylet badminton shuttlecock shaped, 68 µm long, comprised of incomplete tube of thin sclerotic sheet with single, narrow (~ 2 µm), longitudinal gap; proximal three-quarters cone shaped, 22 µm in diameter at its base, narrowing toward its tip, with many longitudinal ridges inside; distal quarter bulbous, slightly elongated along stylet axis, 14 µm in maximum diameter, with single, transverse constriction slightly behind its widest portion; numerous, minute, wart-like projections present inside distal bulbous region ( Fig. 16A, B View Fig ); cirrus spine absent. Ovary 100 µm long, 70 µm wide, located posterior to pharynx ( Fig. 15A View Fig ). Common atrium 110 µm in diameter, leading to genital pore opening on ventral side of body located near caudal end ( Fig. 15A View Fig ).

Etymology. The specific name refers to the shape of the stylet in the new species.

Remarks. The stylet in Proschizorhynchella shuttlecock sp. nov. is badminton shuttlecock shaped, which is unique among the congeners, which mostly show a conical stylet ( Table 1 View Table 1 ). Proschizorhynchella shuttlecock lacks adhesive girdles and thus resembles Proschizorhynchella faroeensis ( Steinböck, 1931) and Proschizorhynchella spiracirro ( Schilke, 1970) . The latter two possess cirrus spines ( Steinböck 1931; Schilke 1970) but P. shuttlecock does not.

ICHUM

Invertebrate Collection of the Hokkaido University Museum

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