Unrecorded species of Korean invertebrates discovered through the project of ‘ Discovery of Korean Indigenous Species’ II Author Ji, Su-Jung Department of Biological Sciences and Bioengineering, Inha University, Incheon 22212, Republic of Korea Author Jung, Chuleui Department of Plant Medicals, Andong National University, Andong 36729, Republic of Korea Author Bang, Hyun Woo Division of Biomedical Engineering & Biotechnology, College of Science & Technology, Mokwon University, Author Song, Min Ok Department of Biology, Gangneung-Wonju National University, Gangneung 25457, Republic of Korea Author Jung, Jongwoo Department of Science Education, Ewha Womans University, Seoul 03760, Republic of Korea Author Yoon, Seong Myeong Department of Biology, Chosun University, Gwangju 61452, Republic of Korea Author Lee, Seunghwan Insect Biosystematics Laboratory, Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea Author Keum, Seoyoung Department of Plant Medicals, Andong National University, Andong 36729, Republic of Korea & Silkworm and Insect Management Center, Agricultural Resource Management Institute, Gyeongbuk Provincial Government, Sangju 37110, Republic of Korea Author Yang, Hee-Min Department of Biological Sciences and Bioengineering, Inha University, Incheon 22212, Republic of Korea Author Lee, Dongmin Department of Parasitology, Parasite Research Center and International Parasite Resource Bank, School of Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea Author Lee, Geon Hyeok Department of Biological Sciences and Bioengineering, Inha University, Incheon 22212, Republic of Korea & Department of Biology, Chosun University, Gwangju 61452, Republic of Korea Author Oh, Jaeseok Insect Biosystematics Laboratory, Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea Author Kim, Kichoon Department of Life Science, College of Natural Sciences, Hanyang University, Seoul 04763, Republic of Korea Author Park, Hansol Department of Parasitology, Parasite Research Center and International Parasite Resource Bank, School of Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea Author Moon, Heejin Division of Biomedical Engineering & Biotechnology, College of Science & Technology, Mokwon University, Author Joharchi, Omid Department of Plant Medicals, Andong National University, Andong 36729, Republic of Korea Author Kang, Yeseul Department of Parasitology, Parasite Research Center and International Parasite Resource Bank, School of Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea Author Eom, Keeseon S. Department of Parasitology, Parasite Research Center and International Parasite Resource Bank, School of Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea Author Lee, Kyung Jin Animal Resources Division, National Institute of Biological Resources, Incheon 22689, Republic of Korea Author Eun, Ye Animal Resources Division, National Institute of Biological Resources, Incheon 22689, Republic of Korea Author Kim, Taeho Animal Resources Division, National Institute of Biological Resources, Incheon 22689, Republic of Korea Author Karanovic, Ivana Department of Life Science, College of Natural Sciences, Hanyang University, Seoul 04763, Republic of Korea ivana@hanyang.ac.kr Author Lee, Jeounghee The Division of EcoCreative, Ewha Womans University, Seoul 03760, Republic of Korea & Marine Biological Resource Institute, Sahmyook University, Seoul 01795, Republic of Korea ivana@hanyang.ac.kr Author Choe, Seongjun Department of Parasitology, Parasite Research Center and International Parasite Resource Bank, School of Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea ivana@hanyang.ac.kr Author Min, Gi-Sik Department of Biological Sciences and Bioengineering, Inha University, Incheon 22212, Republic of Korea ivana@hanyang.ac.kr text Journal of Species Research 2023 12 1 68 89 journal article 10.12651/JSR.2023.12.1.068 2713-8615 12753339 13. Habrotrocha serpens Donner, 1949 ( Fig. 13 ) ẹḋữâ충 ( ṵAE ) Habrotrocha serpens Donner, 1949 , p. 130 , fig. 10. Material examined. Jeongseon-gun ( 37°15′53.6″N , 128°37′0.2″E ), Korea; collected by CH Lee and MO Song on 28 August 2021 . Deposition. NIBRIV0000895446. World distribution. Austria , China , Czech Republic , Rumania , Spain and Korea . Diagnosis. Rostral lamella big, round, wider than rostrum end, and without median notch. Rostrum long; about 1.5 times as long as rostrum width. Head and neck long. Pharyngeal tube about three times as long as trophi length. Trunk cylindrical and slightly wider than neck width. Foot much narrower than trunk, very short; about 1/15 of total length in creeping. Spurs conical, short and with narrow interspace.