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 2023-02-28 12 1 68 89 journal article 300105 10.12651/JSR.2023.12.1.068 4d3cf9a7-37df-460a-b27a-332e6f399cac 2713-8615 12753339 32. Robustaurilla assimilis (Kayiyama, 1913) ( Fig. 32 ) ffi대AEŜýẫŦDḄḤṆḇNj ( ṵAE ) Cythereis assimilis Kajiyama, 1913 . Mutilus assimilis ( Kajiyama, 1913 ) Ishizaki (1968) . Robustaurila assimilis ( Kajiyama, 1913 ) Yajima (1982) . Material examined. Bongam-ri ( 34°59.629′N , 128° 26.198′E ), Gyeongsangnam-do , Korea ; collected by I Karanovic on 31 March 2013 . Deposition. NIBRIV0000835142. World distribution. Japan and Korea . Diagnosis. Size about 1.2 mm . Surface pitted coarsely and irregularly. The pits, except in the middle area, often disappearing. Anterior marginal ridge strong, parallel to anterior margin. Ventral marginal ridge strong. Radiate ridges also strong. Valves asymmetrical. Left valve sub-quadrangular in lateral view; greatest height at anterior third. Dorsal margin slightly convex, descending backward, with distinct process postero-dorsally. Anterior margin broadly and distortedly rounded. Posterior margin concave above, convex below, with some denticles, the lowest one of which is most prominent. Ventral margin almost straight. Right valve lower than the left. Remarks. The genus Mutilus differs from the genus Aurila only in having strong ornamentation on the surface. No difference in soft parts is found between both genera. Future revisions are necessary and will probably lead to synonymyzation of the two genus names.