Genus Trapezionida Macpherson & Baba, in Machordom, Ahyong, Andreakis, Baba, Buckley, Garcia-Jimenez, McCallum, Rodriguez-Flores & Macpherson, 2022

Remarks. Trapezionida is presently represented by 157 species (Machordom et al. 2022; Tiwari et al. 2022a, 2023; WoRMS 2023b), all of them are distributed in the Indo-West Pacific. From Japanese waters, the following 30 species assigned to the genus have been recorded (Baba et al. 2008; Komai 2011, 2012; Komai & Higashiji 2016): T. agave (Macpherson & Baba, 1993), T. caesura (Macpherson & Baba, 1993), T. consobrina (Komai, 2012), T. disiunctus (Komai, 2011), T. heteracantha (Ortmann, 1892), T. honshuensis (Benedict, 1902), T. japonica (Stimpson, 1858), T. kawamotoi (Osawa & Okuno, 2002), T. koyo (Komai, 2011), T. leptosyne (Macpherson, 1994), T. longinquus (Komai, 2011), T. maculata (Komai, 2012), T. megalophthalma (Komai, 2012), T. multilineata (Komai, 2012), T. munin (Komai, 2011), T. nesaea (Macpherson & Baba, 1993), T. olivarae (Macpherson, 1994), T. ommata (Macpherson, 2004), T. osawai (Komai, 2012), T. paucistria (Komai, 2012), T. pectinata (Macpherson & Machordom, 2005), T. pherusa (Macpherson & Baba, 1993), T. rufiantennulata (Baba, 1969), T. sagamiensis (Doflein, 1902), T. solitaria (Komai, 2012), T. squamifera (Komai, 2012), T. striola (Macpherson & Baba, 1993), T. trigonocornus (Komai, 2012), T. vicina (Komai, 2012) and T. zebra (Macpherson, 1994) . In this study, we report T. psylla, previously known from the Southwest Pacific, as a species new to the Japanese fauna.