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Masracetus Temporal range: 37.2–33.9 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Restoration
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Artiodactyla
Infraorder:	Cetacea
Family:	†Basilosauridae
Subfamily:	†Dorudontinae
Genus:	†Masracetus Gingerich 2007
Species
M. markgrafi (type) Gingerich 2007

Masracetus (from Arabic Masr, "Egypt", and Greek ketos, "whale") is an extinct genus of basilosaurid ancient whale known from the Late Eocene (Priabonian, 37.2 to 33.9 million years ago) of Egypt.

Masracetus was briefly described in an addendum by Gingerich 2007 and is known from just an assemblage of vertebrae and a poorly reconstructed skull from 1908. The lumbar vertebrae are large but relatively short (anteroposteriorly) compared to those of other archaeocetes; the diameter is almost the same as for Basilosaurus isis but the length is less than half of the latter. Masracetus is larger than Cynthiacetus, but it is suggested that the former might be synonymized as a junior synonym with the latter.

The species name honours Richard Markgraf, palaeontologist Ernst Stromer's fossil collector, who collected the type specimen in 1905.

Masracetus' type locality is the Birket Qarun Formation in Dimê (29°30′N 30°42′E / 29.5°N 30.7°E / 29.5; 30.7, paleocoordinates 24°54′N 26°36′E / 24.9°N 26.6°E / 24.9; 26.6) north of lake Birket Qarun, but specimens have also been found in the Qattara Depression and Fayum.

Notes

1. ^ Gingerich 2007, Etymology, p. 375
2. Masracetus in the Paleobiology Database. Retrieved July 2013.
3. Gingerich 2007, p. 375
4. Martínez-Cáceres, M.; Lambert, O.; De Muizon, C. (2017). "The anatomy and phylogenetic affinities of Cynthiacetus peruvianus, a large Dorudon-like basilosaurid (Cetacea, Mammalia) from the late Eocene of Peru" (PDF). Geodiversitas, Museum National d'Histoire Naturelle Paris. 39 (1): 7–163. doi:10.5252/g2017n1a1. S2CID 90142285.
5. Dimeh (Eocene of Egypt) in the Paleobiology Database. Retrieved July 2013.
6. Masracetus markgrafi in the Paleobiology Database. Retrieved July 2013.
7. Qattara Depression (Eocene of Egypt) in the Paleobiology Database. Retrieved July 2013.
8. Minqar Tibaghbagh (Eocene of Egypt) in the Paleobiology Database. Retrieved July 2013.
9. Minqar el-Hut (Eocene of Egypt) in the Paleobiology Database. Retrieved July 2013.

References

• Gingerich, Philip D (2007). "Stromerius nidensis, new archaeocete (Mammalia, Cetacea) from the Upper Eocene Qasr El-Sagha Formation, Fayum, Egypt" (PDF). Contributions from the Museum of Paleontology. 31 (13): 363–78. OCLC 214233870.

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