VASISHAT , 1985, 2019

Hartman, Julian, Van De Weerd, Andrew A., Bruijn, Hans De & Wessels, Wilma, 2019, An Exceptional Large Sample Of The Early Miocene Ctenodactyline Rodent Sayimys Giganteus, Specific Variation And Taxonomic Implications, Fossil Imprint 75 (3 - 4), pp. 359-382 : 378

Sayimys perplexus WOOD, 1937, S. badauni VASISHAT, 1985 and S. sihingensis QIU, 2017

C o m m e n t s. Baskin (1996) remarked that Sayimys is rare in Siwalik deposits younger than 9 Ma. Sayimys perplexus WOOD, 1937 with type locality near Haritalyangar ( India) in the Nagri Formation (age approx. 7 Ma; Baskin 1996), has been considered a junior synonym of S. sivalensis by some specialists (e.g. Munthe 1980). Sayimys badauni was described by Vasishat (1985) from the Pliocene Tatrot Formation, near Badauni ( India). See López-Antoñanzas and Sen (2003) and López-Antoñanzas and Knoll (2011) for some remarks on these two poorly known species. These two occurrences extend the stratigraphic range of Sayimys in the Siwaliks into the Pliocene. The recently described Sayimys sihingensis (Qiu 2017) from the later part of the early Miocene, Jiangsu Province ( China) is based on very limited material. This record extends the geographical range of the genus to eastern China. Judging from the figures, S. sihingensis seems more hypsodont than the time-equivalent material from Pakistan.