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References

Blackman, R L, Spence, J M and Normark, B B 2000. High diversity of structurally heterozygous karyotypes and rDNA arrays in parthenogenetic aphids of the genus Trama (Aphididae: Lachninae). Heredity 84: 254–260.

Blackman, R L, De Boise and E Czylok, A 2001. Occurrence of sexual morphs in Trama troglodytes von Heyden, 1837 (Hemiptera, Aphididae). Journal of Natural History 35: 779–785.

Heie, O E (1995) The Aphidoidea of Fennoscandia and Denmark VI. Family Aphididae: Part 3 of tribe Macrosiphini and family Lachnidae (account of Tramini on pp. 155–165). Fauna Entomologica Scandinavica 31: 217 pp.

Normark, B. (1999) Evolution in a putatively ancient asexual aphid lineage: recombination and rapid karyotype change. Evolution 53: 1458–1469.