“…M. cyclopis is restricted to Taiwan, and M. fuscata is found only on the three main Japan islands south of Hokkaido and some neighboring small islands just south of Kyushu (Fooden & Aimi, 2005; Fooden & Wu, 2001; Ito et al, 2021). Molecular studies confirm the fascicularis species group forms a monophyletic group with M. fascicularis representing the sister to the other species and rapid diversification from an ancestral M. mulatta population into M. cyclopis and M. fuscata , likely facilitated by dispersals to their respective island distributions (Abegg & Thierry, 2002; Delson, 1980; Ito et al, 2021; Li et al, 2009; Springer et al, 2012; Tosi et al, 2000, 2003). Across the species group and in M. fascicularis specifically, combinations of natural over‐water dispersals, anthropogenically aided dispersals, local extinctions and repeated re‐colonization of islands, and over‐land movement between the Sunda Shelf islands in southeast Asia during glacial periods have contributed to complex patterns of island biogeography and population history, yet most populations appear to follow a consistent latitudinal cline in body size, tail proportions, and cranial length (Abegg & Thierry, 2002; Evans et al, 2020; Fooden, 1991, 1995; Fooden & Albrecht, 1993; Kawamoto et al, 2007, 2008; Yao et al, 2017).…”