Decemtestis takanoha Yamaguti, 1951

Ji, Su-Jung, Jung, Chuleui, Bang, Hyun Woo, Song, Min Ok, Jung, Jongwoo, Yoon, Seong Myeong, Lee, Seunghwan, Keum, Seoyoung, Yang, Hee-Min, Lee, Dongmin, Lee, Geon Hyeok, Oh, Jaeseok, Kim, Kichoon, Park, Hansol, Moon, Heejin, Joharchi, Omid, Kang, Yeseul, Eom, Keeseon S., Lee, Kyung Jin, Eun, Ye, Kim, Taeho, Karanovic, Ivana, Lee, Jeounghee, Choe, Seongjun & Min, Gi-Sik, 2023, Unrecorded species of Korean invertebrates discovered through the project of ‘ Discovery of Korean Indigenous Species’ II, Journal of Species Research 12 (1), pp. 68-89 : 71

5. Decemtestis takanoha Yamaguti, 1951 ( Fig. 5 )

Ȑ ẪPģḡľů충 (ṵAE)

Material examined. Bukchon-ri, Jejudo, Korea; collected by YS Kang on 3 March 2016 ; Shinheung-ri, Jejudo; collected by YS Kang on 3 and 8 March 2016 .

Deposition. NIBRIV0000835085, NIBRIV0000835086.

World distribution. Pacific Ocean ( Japan and Korea).

Diagnosis. Body elliptical. Oral sucker subterminal. Ventral sucker slightly larger than oral sucker, at anterior part of mid-body. Testes ten, in two longitudinal lines, occupied median field in hindbody. Cirrus sac claviform. Genital pore near intestinal bifurcation. Ovary irregularly lobed, wider than length. Vitelline follicles profusely distributed between intestinal bifurcation and posterior extremity. Eggs oval, yellow.

Remarks. The genus Decemtestis is characterized by the 9 or 10 testes arranged mostly in two lines in the hindbody and non-filamentous eggs ( Cribb, 2005). The present specimens are identified as D. takanoha on a basis of preacetabular cirrus sac and smaller ventral sucker than that of D. megacycle ( Yamaguti, 1938; Yamaguti, 1951).

Figures

Fig. 5. Adult worm of Decemtestis takanoha Yamaguti, 1951 from intestine of Goniistius zonatus (Cuvier, 1830). Ventral view. Scale bar=500μm.