Fragilicetus velponi: a new mysticete genus and species and its implications for the origin of Balaenopteridae (Mammalia, Cetacea, Mysticeti) Author Bisconti, Michelangelo Author Bosselaers, Mark text Zoological Journal of the Linnean Society 2016 2016-05-20 177 2 450 474 http://dx.doi.org/10.1111/zoj.12370 journal article 10.1111/zoj.12370 0024-4082 5364570 FRAGILICETUS VELPONI SP. NOV. Holotype : Item no. NMR 999100007727 , housed at the Natuurhistorisch Museum Rotterdam , The Netherlands (hereinafter, NMR ). Type locality: The specimen was found along the southwest border of the Deurganckdock, approximately 12 km north-west of Antwerp city centre and 4 km north of the village of Kallo ( Fig. 1 ). The Deurganckdock is an artificial excavation located on the left side of the Scheldt River. The geographical coordinates of the discovery site are 51°17′05″N , 4°15′30″E . Formation and age: The specimen was found in situ in the Kattendijk Sand Member of the Kattendijk Sands Formation (Early Pliocene, Zanclean), about 3 m above the basal gravel, at a depth of about 21.5 m below the Tweede Algemene Waterpassing (TAW; Fig. 2 ). TAW is the standardized (rectified) second general water level (main level of the sea at Ostend at low tide). The Belgian standard TAW is 2.33 m lower than the Dutch, German, and French standards. At the discovery site, the basal gravel of the Kattendijk Sand Member is in contact with and on top of the Rupel clay (Oligocene, firmed by Louwye et al . (2004) . Based on these correlations, the estimated age of the holotype skeleton of F. velponi is approximately 5 Mya. Diagnosis: As for genus. Etymology: Velpon is the brand of the glue used in the preparation of the holotype skull.