| Description: |
Sivaonyx sarwari n. sp. (Fig. 2B1-B3) urn:lsid:zoobank.org:act: 123FFCDF-CE50-4AE6-AB31-1F563001A874 DERIVATION OF NAME. — After Dr Muhammad Sarwar, the second vertebrate palaeontologist of the Punjab University and who have done extensive field work during the 1963-1977 throughout Pakistan, that resulted in the identification and exploration of new localities and became a source of guidance for the field work for the future palaeontologists of Pakistan. HOLOTYPE. — PUPC 17/64, lP4. TYPE LOCALITY. — Hasnot, Jhelum, Punjab, Pakistan. DIAGNOSIS. — A small Sivaonyx species having P4 with round borders/external walls, basal lingual cingulum is straight at mesial border, postparacrista short and having less buccal concavity, lack a cusplet between proto- and hypocone, small mesial valley hence, less pinched mesial border, and very long posthypocrista, the crest that joins hypocone with metastyle/metacone. DIFFERENTIAL DIAGNOSIS. — Differs from all Sivaonyx species being small in size, having round outline, basal lingual cingulum is straight at mesial border, and small mesial valley hence, less pinched mesial border. It differs from Sivaonyx bathygnathus in having short postparacrista, less spaced proto- and hypocone, and having no cusplet between proto- and hypocone; from Sivaonyx gandakasensis in short postparacrista, long posthypocrista, and more buccal concavity of postparacrista; from Sivaonyx hessicus Lydekker, 1890 in having weak buccal concavity of postparacrista, no cusplet between proto- and hypocone, very long posthypocrista; from Sivaonyx hendeyi Morales, Pickford & Soria, 2005 in lacking notch between paracone and metastyle, having very long posthypocrista, and weak buccal cingulum; from Sivaonyx ekecaman Werdelin, 2003 in having longer pre- and postparacrista, slightly distally positioned protocone, lack of notch between paracone and metastyle, weak buccal concavity of postparacrista, no cusplet between proto- and hypocone, large median valley, and very long posthypocrista; and from Sivaonyx soriae ... |