Robertsonia propinqua (Scott T., 1894)

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 : 81

28. Robertsonia propinqua (Scott T., 1894) ( Fig. 28 )

ṻṄ로fflīèdz÷ƚḇNj (ṵAE)

Dactylopus propinquus Scott T., 1894 .

Amphiascus scotti Sewell, 1924 .

Teissierella propinqua (Scott T., 1894) .

Material examined. Buan-gun (35°37′24.69″N, 126°28′ 0.82″E), Korea; collected by collected by HW Bang and H Moon on 6 July 2020 .

Deposition. NIBRIV0000879020.

World distribution. Mainly subtropical regions such as Africa, India, Argentina, Australia and Korea.

Diagnosis. Body fusiform, slightly depressed, with bent at joint between prosome and urosome. Total body length 857 μm, largest width 229 μm. Rostrum prominent, triangular, with rounded basal corners. Caudal rami short, about 1.4 times wider than long. Antennule five segmented. Antennal exopod three segmented. Swimming legs I - IV biramous, endopods and exopod three segmented. First endopodite segment of P1 (first thoracopod) reaching to end of exopod. P5 (fifth thoracopod) baseoendopod armed with five setae. Exopod nearly as long as wide and armed with six setae.

Remarks. This species is reported from Korean waters for the first time. There are 17 species of genus Robertsonia has so far been reported in the world and a key to the species of the genus Robertsonia is given by Hamond (1973) and Fiers (1996).

Family Pseudotachidiidae Lang, 1936 ṻ날래dz÷ƚḇNjň

Genus Danielssenia Boeck, 1873 Üṻ날래dz÷ƚḇNjṧ (ṵAE)

Figures

Fig. 28. Robertsonia propinqua(Scott T., 1894), female. A. dorsal view; B. lateral view. Scale bars=300 μm.