Manaria kuroharai Manaria (?) kuroharai Azuma, 1960:40, 101, pl. 2, fig. 7, pl. 5, fig. 7. Manaria kuroharai - Kantor et al. 2013: 2180, fig. 1(8), (MNHN-IM-2007-32976). Synonym: Siphonalia laddi McNeil, 1961: 71, pl. 8, fig. 16 (syn. nov.) I TYPE MATERIAL - Manaria kuroharai: holotype and 2 paratypes in Azuma collection, now likely stored in BRIT. - Siphonalia laddi: holotype USNM 562823.
TYPE LOCALITY - M. kuroharai: Japan, Tosa, Shikoku Island, 180 m.
DISTRIBUTION - Western Pacific; previously known only from southern Japan, the range is here extended to the South China Sea (offshore Taiwan), and from the Philippines towards Tonga in the south and east; 300-679 m, alive in 420-508 m. Syntopic with M. jonkeri in Taiwan (TAIWAN 2004 stn CP269) and the Philippines (AURORA 2007 stn CP2749); with M. corporosis n. sp. in the Solomons (SALOMON 2 stn CP2227) and with M. tongaensis n. sp. in Tonga (BORDAU 2 stn CP1566).

REMARKS-Siphonalia laddi McNeil, 1961 possesses secondary spiral cords on the base that appear to be slightly stron- ger than in typical M. kuroharai, a character that is subject to variation in Manaria species. Fossil and Recent specimens are identical in all other respects. Manaria kuroharai is characterized by its broadly fusiform shape with a high spire, the elegant and convex spire whorls accentuated by weakly angulated axial ribs, the weak subsutural concavity and the evenly spaced spiral cords of equal strength; the spiral cords are also very straight below the suture(a fine secondary spiral cord appears along the base of some specimens). Radula with typical, bicuspid lateral teeth (Azuma 1960: pl. 5, fig. 7) with broad cusps. Manaria thurstoni E. A. Smith, 1906 differs from M. kuroharai in the laterally flattened whorls with a weak subsutural truncation, the columellar knob, and the wider and flatter spiral cords with narrower interspaces. The radula differs in its central tooth with longer cusps and narrower base. Manaria lirata Kuroda & Habe, 1961 has a similar shape to M. kuroharai, especially when juvenile, but differs in the slightly deeper subsutural concavity, the slightly fewer spiral cords with wider interspaces, and the more twisted appearance of the spiral cords at the transition between axial interspaces and axial ribs; in contrast, the spiral cords of M. kuroharai are very straight, and it attains smaller adult size. Manaria excalibur n. sp. has a similar subsutural concavity but differs from M. kuroharai in its more slender shape and higher spire, the presence of secondary spiral cords, and the slightly wider interspaces.