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 | | The relict species of Auchenorrhyncha and Heteroptera are divided into categories according their area of origin: tropical, mountain-Mediterranean, andglacial. |
 | | Areas with the greatest number of relict species are: Vitosha Mountain (66), the Rila Mountains (62), the Pirin Mountains (42), and the western Rhodopes (34). |
 | | Relict species exist to a lesser degree in other regions of our country: in the central Stara Planina Mountains (18), in the western Stara Planina (14), on Slavyanka Mountain (6), on Belasitsa Mountain (4), in the southern part of the Strouma River valley (3), and on Strandzha Mountain (1). |
| www.worldwildlife.org /bsp/publications/europe/bulgaria/bulgaria6.html (5067 words) |
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