Microdesmidae, Regan, 1912

Lin, Chien-Hsiang, Wu, Siao-Man, Lin, Chia-Yen & Chien, Chi-Wei, 2023, Early Pliocene otolith assemblages from the outer-shelf environment reveal the establishment of mesopelagic fish fauna over 3 million years ago in southwestern Taiwan, Swiss Journal of Palaeontology (23) 142 (1), pp. 1-40 : 23

Microdesmidae indet.

Figure 13k

Remarks Te very small otolith described (<1 mm), with its tall outline (OL/OH <0.63) and distinct features, can be confidently assigned to the family Microdesmidae (e.g., Nolf, 2013: pl. 325). Te otolith exhibits a very straight and vertical posterior rim, as well as a parallel lower half of the anterior rim. In addition, the otolith displays elevated and thickset cristae.

Figures

Fig. 13 Fish otoliths from the Lower Pliocene Gutingkeng Formation,southern Taiwan. Scale bars =1 mm. Images are inner views unless otherwise indicated. a–b Neobythites sp., Site 2, ASIZF 0100647–648. c, Bythitidae indet., Site 2, ASIZF 0100649. d–j Gutingichthys changi sp. nov., ASIZF 0100650–656,d holotype, Site 2, e–j, paratypes, e, g, h, j Site 2, f, i Site 5, sand layer. k Microdesmidae indet., Site 5, mud layer, ASIZF 0100657. l Jaydia sp., Site 5, mud layer, ASIZF 0100658. m–p Myersina filifer (Valenciennes, 1837), Site 5, sand layer, ASIZF 0100659–662. 1, ventral view; 2, inner view