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Morphometric studies of some Pteromalus Swederus species (Hymenoptera: Chalcidoidea) with emphasis on allometric relationships, or: Are ratios reliable in chalcid taxonomy?
Author(s) -
JANZON LARSÅKE
Publication year - 1986
Publication title -
systematic entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.552
H-Index - 66
eISSN - 1365-3113
pISSN - 0307-6970
DOI - 10.1111/j.1365-3113.1986.tb00166.x
Subject(s) - biology , allometry , hymenoptera , taxonomy (biology) , parasitoid , zoology , ecology
Twenty‐four ratios, very commonly used among hyme‐nopterists, were studied in order to determine the extent to which allometry influences a given measure. On basis of regression lines, this. investigation reveals that about 60% of the ratios show errors caused by allometry. E.g. it is advisable to correct POL/OOL, Postmarginal vein/Marginal vein and Mesoscutum length/Thorax length before utilizing them as species separating character states. In this study females belonging to the Pteromalus albipennis group (Hymenoptera, Chalcidoidea) were examined.