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Range DescriptionKobayashi and Langguth (1999) believed the range of Callicebus coimbrai was limited to the coastal rainforests at the mouth of the rio São Francisco in Sergipe and the mouth of the rio Itapicuru in northern Bahia, Brazil. Printes (2005) recorded the species at Lamarão do Passé, extending its range some 200 km further south. Knowledge of this species’ range and conservation status has increased substantially in the recent years (Kobayashi and Langguth 1999; Sousa 2000, 2003; Printes 2005; Jerusalinsky et al. 2006; Sousa et al. in prep). The taxon has now been confirmed at at least 70 sites in the states of Bahia and Sergipe. The largest is a 3,000 ha tract in São Francisco do Paraguaçu, Bahia; the smallest is a 6 ha fragment in Nossa Senhora da Glória, Sergipe (Sousa 2003). The sites where this species has been confirmed encompass an estimated total area of 15,400 ha (154 km²), 4,800 ha of this in Sergipe, and 10,600 ha in Bahia (Sousa et al. in prep).
The lower Paraguaçu forms the limit between the geographic ranges of C. coimbrai, restricted to the left or north bank, and C. melanochir, found on the right bank. Further west, in the region of Feira de Santana, C. barbarabrownae occurs on both banks of the Paraguaçu. There does not appear to be a physical barrier between the eastern limit of the range of C. barbarabrownae and the western limit of C. coimbrai (Printes et al. in prep.). Further surveys are needed.