sym·pat·ric 
(sĭm-pătrĭk)
(sĭm-pătrĭk)adj.
1. Occupying the same or overlapping geographic areas. Used of organisms, especially populations of the same or closely related species.
2. Occurring among populations having such a distribution: sympatric speciation.
[SYN- + Greek patrā, fatherland (from patēr, patr-, father; see pəter- in the Appendix of Indo-European roots) + -IC.]
sym·patri·cal·ly adv.
sympat·ry (sĭmpăt′rē, -pə-trē) n.