A–J: Lampanyctus lenticularis sp. nov., Tsuyama City, Takakura Formation; B–D: holotype, SMF PO 101.121, level h; A, E–J: paratypes, SMF PO 101.122, levels f, g, h, j; K–M: Lampanyctus profestus Schwarzhans, 2019, SMF PO 101.123, Tsuyama City, Takakura Formation, level MS 36; N–V: Lampanyctus tsuyamaensis sp. nov., Tsuyama City, Takakura Formation; N–P: holotype, SMF PO 101.124, level MS 15; Q–V: paratypes, SMF PO 101.125, levels MS 15, MS 36, MS 90; W–AJ: Stenobrachius ohashii sp. nov.; W–Y: holotype, SMF PO 101.126, Yatsuo machi, Toyama City, Kurosedani Formation, level K 5; Z–AB, AF–AJ: paratypes, SMF PO 101.127, Tsuyama City, Takakura Formation, levels MS 15, MS 70; AC–AD: paratype, SMF PO 101.128, Niimi City, Bihoku Group; AE: paratype, SMF PO 101.129, Fuchu machi, Toyama City, Higashibessho Formation, level H 21; AK–AM: Stenobrachius leucopsarus (Eigenmann & Eigenmann, 1890), Recent, coll. Schwarzhans, leg. Fitch, off California; AN–AO: Stenobrachius nannochir (Gilbert, 1890), Recent, NSMT-P.63309, 36°28'N, 141°10'E.