2019 年 24 巻 1 号 p. 29-48
Four species of the family Dulichiidae (Crustacea: Amphipoda) are described from Japan. The first species is Dulichia biarticulata Hirayama and Takeuchi, 1993, which is characterized by the 2-articulate accessory flagellum and the expanded basis of the pereopod 4. The occurrence of this species from Miyagi–Osaka Prefectures and Fukui Prefecture is the first record from localities other than the type locality, and the morphological characters of the female are also described for the first time. The second species, Dulichia latimana sp. nov., was collected from the Ariake Sea and Sagami Bay. In this species, the male has a robust gnathopod 2 with a short proximal projection on the propodus and the slightly expanded basis of the pereopod 4. The third species is Dulichiopsis barnardi Laubitz, 1977 from off Fukushima Prefecture, which has the eyes composed of many dispersed ommatidia, the propodi of the pereopods 5–7 with a palm and the uropod 2 outer ramus about half length of the inner ramus. The morphological characters of the male are firstly described. The last species is Metadulichia kohtsukai gen. nov., sp. nov. from Sagami Bay. This species can be distinguished by the small maxilla 1 with 7 terminal robust setae on the outer plate, the maxilla 2 inner plate bearing single mediofacial seta, and the extremely short outer ramus of the uropod 2. A key to Japanese species of the family is provided.
