Notoberyx cionei Schwarzhans & Mors & Engelbrecht & Reguero & Kriwet 2017, sp. nov.

• Main Authors: Schwarzhans, Werner, Mors, Thomas, Engelbrecht, Andrea, Reguero, Marcelo, Kriwet, Jurgen
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Beryciformes; Trachichthyidae; Notoberyx; Notoberyx cionei; Antarc*; Antarctica; Seymour Island
• Online Access: https://doi.org/10.5281/zenodo.10883176; http://treatment.plazi.org/id/041B87CAFFAAFFFED61FFD2CE0B1D961

Notoberyx cionei sp. nov. (Figs 5D—G, 6O) Material. Holotype: NRM-PZ P.15987 (Figs 5D—F, 6O). Paratypes: two specimens, NRM-PZ P.15988— 15989 (Fig. 5G). Occurrence. Telm 5 unit; ‘ Natica horizon’, Cucullea I member, La Meseta Formation, late Ypresian, early Eocene. Site IAA 2/95, Seymour Island, Antarctica. Etymology. Named in honour of Alberto Cione (La Plata, Argentina) for his many contributions to the knowledge of fossil fishes from South America and Antarctica. Diagnosis. OL:OH = 0.7—0.75. Dorsal rim high, broad; ventral rim deep, broad. Rostrum short, blunt, about equal length of antirostrum. CaL:OsL = 1.4—1.5. Ostium narrow, only slightly wider than cauda; cauda distinctly turned upwards. Description. Large, robust, high-bodied, oval otoliths up to about 6 mm in length (holotype 5.8 mm long). OL:OT = 3.0. Dorsal rim high, much expanded and broad, undulating; rounded pre- and postdorsal angles close to anterior and posterior limits of dorsal rim, postdorsal angle usually somewhat pronounced. Ventral rim deep, nearly as broad and expanded as dorsal rim, but more gently curved and smooth. Anterior rim blunt, nearly vertically cut, with very short and massive rostrum not reaching beyond length of antirostrum; with broad, shallow excisura in between. Posterior rim likewise blunt and nearly vertically cut, its tip shifted dorsally above level of caudal tip. Inner face bent along the horizontal axis, nearly straight in vertical direction. Sulcus slightly supramedian, wide, moderately deep. Ostium anteriorly opened, slightly deepened, distinctly shorter than cauda and only slightly wider. OsH:CaH = 1.15—1.3. Cauda long, bent upwards, terminating close to posterior rim of otolith, its colliculum with well-marked ventral rim. Dorsal depression wide, large, well defined towards sulcus; dorsal field with some short radial furrows near the dorsal margin. Ventral field smooth, with distinct ventral furrow very close to ventral rim of otolith. Outer face with broad central umbo. Remarks. These highly diagnostic otoliths ...