Dero digitata ( Müller, 1774 ), Sperber, 1958

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

6. Dero digitata ( Müller, 1774) ( Fig. 6 )

ẺãḃậȃmǵÑ (ṵAE)

Nais digitata Müller, 1773: 22 .

Dero digitata (Müller) Sperber, 1958: 49 .

Material examined. Boeun-gun (36°19′58.49″N, 126°39′ 35.87″E), Korea; collected by JH Lee on 20 May 2016.

Deposition. NIBRIV0000879697.

World distribution. Cosmopolitan.

Diagnosis. Dorsal bundles onward from VI; mostly one hair chaeta, and one needle chaetae. Ventral chaetae II - V by four to five per bundle, with 1.5 times longer upper tooth ( Fig. 6A ). Branchial fossa with antero-dorsal margin entire, convex and ciliated and a postero-ventral margin prolonged into a non-ciliated rounded lip. Foliate gills four pairs, one pair dorsal and small, one pair lateral and two pairs ventral ( Fig. 6B ).

Remarks. The chaeta of our specimen is a bit shorter than previous studies ( Timm, 2009). It is too early to predict because there is only one confirmed sample. After more samples are taken, they should be compared.

Figures

Fig. 6. Dero digitata(Müller, 1774).A. ventral chaeta; B. branchial fossa and posterior gills, dorsal aspect in fixed. Scale bars: A= 40μm; B=100 μm.