Published January 31, 2003 | Version v1

Seed-infesting chalcids of the genus Megastigmus Dalman, 1820 (Hymenoptera: Torymidae) native and introduced to the West Palearctic region: taxonomy, host specificity and distribution

Description

Roques, A., Skrzypczyńska, M. (2003): Seed-infesting chalcids of the genus Megastigmus Dalman, 1820 (Hymenoptera: Torymidae) native and introduced to the West Palearctic region: taxonomy, host specificity and distribution. Journal of Natural History 37 (2): 127-238, DOI: 10.1080/713834669, URL: http://www.tandfonline.com/doi/abs/10.1080/713834669

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Identifiers

LSID
urn:lsid:plazi.org:pub:A04DBA297A5BFF9DFFE8C97BB011FFF8
URL
http://publication.plazi.org/id/A04DBA297A5BFF9DFFE8C97BB011FFF8

References

  • Novitzky (1954) assumed the sex ratio to be balanced in native countries. Fabre et al. (1994) measured a ratio of 730W:825X when summing emergences from 18 locations in Turkey, but the sex ratio largely varied between locations. In southeastern France, the introduced populations showed a ratio of 433W:602X at Mt Ventoux.
  • Observed in seeds of the cedar species (Cedrus spp., Pinaceae) originating from the eastern part of the Mediterranean Basin: C. libani (Novitzky, 1954; Schimitschek, 1955; Canakcioglu, 1959, 1969, 1990; Lessmann, 1962; Ozkazanc, 1979; Fabre et al., 1994; AR; USNM) and C. brevifolia (Hussey, 1957; USNM ). In France, it shifted on to another introduced cedar, C. atlantica, and a Spanish fir, Abies pinsapo (Fabre et al., in preparation). Records on cypress (Schimitschek in Schwenke, 1982) probably represented misidentifications.
  • Originates from southeastern Europe and Asia Minor. Present in Cyprus (Hussey, 1957); Greece: Crete and islands of the eastern Aegean Sea (Schimitschek, 1955); Lebanon (Novitzky, 1954; Fabre et al., 1994; AR); Syria (Novitzky, 1954; USNM ); and Turkey (Acatay, 1961; Novitzky, 1954; Canakcioglu, 1959, 1969, 1990, 1993; Lessmann, 1962; Ozkazanc, 1979; Fabre et al., 1994; AR). Recently introduced to Mt Ventoux, southeastern France (probably in 1994 with seed lots of C. libani from Turkey; J. P. Fabre, personal communication), where it is gradually invading the naturalized stands of cedars and Spanish fir.