Aslam et al., J. Anim. Plant Sci. 25 (3 Supp. 2) 2015 Proceedings of The National Conference and Training Workshop “Wildlife and Aerobiology” held on February 6-7, 2015 Lahore, Pakistan 461 NEW COLLECTION OF CONOHYUSSINDIENSIS, A MIDDLE MIOCENE SUID, FROM CHAKWAL, PAKISTAN. S. Aslam, A. M. Khan and M. Akhtar Department of Zoology, University of the Punjab, Lahore, 54590, Pakistan Corresponding Author’s Email: majid.zool@pu.edu.pk ABSTRACT New fossils of Conohyussindiensis have been collected from Middle Miocene localities of Lawa, Kallar Kahar and Dhok Bun Ameer Khatoon in district Chakwal. Conohyussindiensis is very common suid in the Chinji type area of Pakistan. Its biostratigraphic range varies between Kamlial type areas to the base of Nagri Formation. The probable time range of C. sindiensis is from 15 to 11 million years. The sample comprises isolated molars. The morphometric description of these specimens will add new information regarding molar morphology as well as the biogeographic distribution of Conohyussindiensis. Keywords:Lower Siwaliks; Chinji; Lawa; Dhok Bun Ameer Khatoon; Suidae; Mammalia. INTRODUCTION Lower Siwaliks of Pakistan yields earliest suid fauna of the world. Suid fossils from Kamlial Formation are oldest but are poorly known (Pickford, 1988). Three genera of suids i.e., Listriodon,Conohyus and Hyotherium are known from Lower Siwaliks of Pakistan probably ranging in age from about 12.5Ma to about 10Ma.Listriodonpentapotamiae and Conohyussindiensis have broad biostratigraphic range in these zones but Hyotheriumpilgrimi is very rare and has restricted biostratigraphic range. Asomewhat larger species of Conohyusknown as C. indicus appears late in Chinji zone and it has been recorded from the same strata as Hipparion. It probably ranges about 11Ma to 9Ma (Pickford, 1988).C.sindiensis is common at all levels in the Chinji zone. Probable time range of C.sindiensis is from 15Ma to 11Ma (Pickford, 1988). Colbert (1933) described in details the skull and mandible of Conohyussindiensis. Cheek teeth were described by Pilgrim (1926) Lydekker (1884) and Colbert(1935). The closest relative of Conohyus is Hyotherium, a typical Miocene pig of Europe. Conohyus has a direct inheritance from Palaeochoerus (Colbert, 1933). Geographic and Stratigraphic contextof Study Area: Dhok Bun AmeerKhatooncontains continuous geological record ranging approximately 18.5Ma- 4.5Ma (Johnsonet al. 1982). DBAK consists of five lithostatigraphic units i.e., Kamlial, Chinji, Nagri, DhokPathan and Soan formation (Figure-1). Among these Chinji, Nagri and DhokPathan are well exposed for fossil collection (Cheema, 2003; Khan et al. 2008; Khan et al. 2011). Site locality DBAK is a village in district Chakwal surrounding the Miocene deposits. Geographical coordinates of DBAK are 32 47’ 26.4’’, 72 55 35.7 E. The fossiliferous section consists of shale, siltstone and sandstone (Khan et al. 2008). Its fossiliferous section consists of shale, siltstone and sandstones. The site locality lava is 11km southeast of lava village with geological coordinates of 32 62’ N, 71 98’ E. fossiliferous deposits consists of sandstone and reddish shale (Khanet al. 2011). Kallar Kahar is located 25km southwest of Chakwal with geological coordinates of 32 47’N, 72 42’ E. The Journal of Animal & Plant Sciences, 25(3 Supp. 2) 2015 Special Issue Page: 461-465 ISSN: 1018-7081