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"Raza, Hilal A."

Raza, Hilal A.: SEE Gingerich et al., 1995. (detail)
 
 
 Gingerich, Philip D.; Arif, Muhammad; Bhatti, M. Akram; Raza, Hilal A.; Raza, S. Mahmood (detail)
   
1995
Protosiren and Babiacetus (Mammalia, Sirenia and Cetacea) from the Middle Eocene Drazinda Formation, Sulaiman Range, Punjab (Pakistan).
Contr. Mus. Pal. Univ. Michigan 29(12): 331-357. 2 tabs. 15 figs. Nov. 30, 1995.
–Describes Protosiren sattaensis, n.sp.
 ABSTRACT--Protosiren sattaensis is a new late Lutetian protosirenid based on a partial skeleton found in the Drazinda Formation of the Sulaiman Range, Punjab Province, Pakistan. The new species is similar to Protosiren fraasi and P. smithae from the middle Eocene of Egypt in having thoracic vertebrae with large, keyhole-shaped neural canals that lack ossified epiphyses and synovial rib articulations. Ribs are densely ossified, but lack the pachyostotic expansion and osteosclerotic isotropy seen in contemporary dugongids. P. sattaensis differs from other species of Protosiren in having a large pelvis with a large obturator foramen. P. sattaensis is important in confirming that the geographic range of Protosiren extended into eastern Tethys, and it is important as a temporal and morphological intermediate linking the two previously known species.
Daryl P. Domning, Research Associate, Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560, and Laboratory of Evolutionary Biology, Department of Anatomy, College of Medicine, Howard University, Washington, D.C. 20059.
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