Diaphus metopoclampoides Steurbaut, 1983

Schwarzhans, Werner, Ohe, Fumio, Tsuchiya, Yuki & Ujihara, Atsushi, 2022, Lanternfish otoliths (Myctophidae, Teleostei) from the Miocene of Japan, Zitteliana 96, pp. 103-134 : 103

Diaphus metopoclampoides Steurbaut, 1983

Fig. 8O-T

Diaphus metopoclampoides 1983 Diaphus metopoclampoides - Steurbaut: pl. 1, figs 22-28.

Diaphus metopoclampoides 1984 Diaphus metopoclampoides Steurbaut, 1983 - Steurbaut: pl. 7, fig. 23.

Diaphus metopoclampoides 2000 Diaphus metopoclampoides Steurbaut, 1983 - Brzobohatý & Nolf: pl. 4, figs 7-14.

Diaphus metopoclampoides 2010 Diaphus metopoclampoides Steurbaut, 1983 - Schwarzhans: pl. 15, fig. 7.

Material.

12 specimens; 6 specimens (figured specimens SMF PO 101.135), Miya River at Oda and Numa, Tsuyama City, Okayama Prefecture, Takakura FM, levels MS 06, f40, gh, j, late Burdigalian, diatom zone 3A-3B ; 2 specimens, Okuna , Mizunami City, Gifu Prefecture, Oidawara FM, early Langhian, diatom zone 4A ; 4 specimens, Osedani , Toyama City, Toyama Prefecture, Higashibessho FM, late Burdigalian to early Langhian, diatom zone 3A-4A .

Discussion.

A very characteristic but relatively rare otolith putatively related to D. epipedus (see above for distinction) that has thus far only been recorded from the late Burdigalian to Langhian of Europe (stratigraphically younger references in Brzobohatý and Nolf 2000, need verification); however, the records from Japan document a much wider geographical distribution in the northern hemisphere. The systematic positions of both species must be regarded as tentative because they do not clearly align with any of the extant Diaphus otolith-based groups.

Diaphus splendidus Otolith Group after Schwarzhans (2013a)

Figures

Figure 8. A-F: Diaphus angulatus Ohe & Araki, 1973; A-C: SMF PO 101.130, Inabacho, Tsu City, Katada Formation, level ML 2305; D-E: SMF PO 101.131, Fuchu machi, Toyama City, Higashibessho Formation, level H 20; G-N: Diaphus epipedus sp. nov.; G-I: holotype, SMF PO 101.132, Tsuyama City, Takakura Formation, level MS 15; K-J: paratype, SMF PO 101.133, Tsuyama City, Takakura Formation, level MS 15; L-N: paratype, SMF PO 101.134, Yatsuo, Toyama City, Higashibessho Formation, level H 21; O-T: Diaphus metopoclampoides Steurbaut, 1983, SMF PO 101.135, Tsuyama City, Takakura Formation level MS 06, f; U-AB: Diaphus watatsumi sp. nov., Tsuyama City, Takakura Formation; U-X: holotype, SMF PO 101.136, level MS 52; Y-AB: paratypes, SMF PO 101.137, levels gh, j; AC-AE: Diaphus sp. 1, col. Tsuchiya, Ichishi Group.