Macruronus eastmani 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; Gadiformes; Merlucciidae; Macruronus; Macruronus eastmani; Antarc*; Antarctic; Antarctica; Seymour Island
• Online Access: https://doi.org/10.5281/zenodo.10903184; http://treatment.plazi.org/id/041B87CAFFACFFFAD48DFD84E2D1DF46

Macruronus eastmani sp. nov. (Figs 4C—F, 6D—F) 1985 Macruronus sp. Schwarzhans: 25, figs 40—42. Material. Holotype: NRM-PZ P.15970 (Figs 4C—E, 6D—F). Paratypes: two specimens, NRM-PZ P.15971 (Fig. 4F). Other material: six fragmentary specimens, NRM-PZ P.15972. Occurrence. Telm 5 unit; ‘ Natica horizon’, Cucullea I member, La Meseta Formation, late Ypresian, early Eocene. Site IAA 1/90, Seymour Island, Antarctica. Etymology. Named in honour of Joseph T. Eastman (Athens, Ohio, USA) in recognition of his contribution to the knowledge of fossil Antarctic fishes. Together with Lance Grande, he was also the first to recognize the presence of fossil gadiforms in the Eocene of the La Meseta Formation. Diagnosis. OL:OH = 1.85—1.95. Ventral rim regularly and moderately deeply curved. All rims and outer face intensely crenulated. CCL: OCL = 1.3. Collum rather wide, with distinct pseudocolliculum. Description. Moderately large and thin otoliths up to at least 8 mm in length (holotype 6 mm long) and rather compressed for a species of the genus Macruronus . OH: OT = 3.7—4.0. Dorsal rim divided into three equally long stretches with broad, obtuse predorsal and rounded postdorsal angles at joints, pre- and postdorsal rims regularly inclined, mediodorsal rim flat to slightly concave, slightly backward inclined; predorsal angle consequently highest point on dorsal rim. Ventral rim regularly curved and moderately deep, deepest just anterior of collum. Anterior tip rounded, at level of ostium; posterior tip slightly projecting, rounded. All rims intensely crenulated, medioventral rim the least. Inner face convex, bent along horizontal axis, with slightly supramedian positioned, moderately wide and shallow sulcus terminating close to anterior and posterior tips of otolith and almost joining them. Sulcus curved, deepest at collum, with ostium only slightly shorter than cauda. Ostial and caudal colliculi well marked, shallow; ostial colliculum anteriorly not reduced; caudal colliculum with slightly bent dorsal margin. Collum ...