Abstract
Epallage fatime (Charp.) is the first member of the family studied cytologically. The chromosome number is: 2n ♂=25,n ♂=13. The sex element is the smallest of the set at all stages of the spermatogenetic cycle. It is usually negatively heterocyclic at spermatogonial metaphase, whereas it is positively heteropyenotic at primary spermatocyte prophase and diakinesis.
While the cytological similarities betweenEpallagidae, Hetaerinidae andCalopterygidae suggest their close mutual affinities, the three differ essentially from thePolythoridae. This view is only partly in agreement with the evidence on the structural and venational characters (ct.Fraser, 1954).
Contrary toFraser's opinion (Fraser, 1957), thePseudolestidae can not be regarded, on the basis of the cytological information available, as an annectent family to the Calopterygoidea, but stand well apart from all other cytologically known Zygoptera.
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InCharpentier's original description (1840.Lib. Eur., pp. 132–134, pl. 45, fig. 2) the specific name is spelled asfatime and notfatima as cited erroneously byFraser (1934 pp. 76–78, figs. 22, 23 a, b). The spellingfatima byKirby (1890.Cat. Odon., p. 108) is therefore wrong.
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Kiauta, B. The karyotype of the damselfly,Epallage fatime (Charpentier, 1840) (Odonata, Zygoptera:Epallagidae), with a note on the cytotaxonomic affinities in the superfamily calopterygoidea. Genetica 41, 525–531 (1970). https://doi.org/10.1007/BF00958931
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DOI: https://doi.org/10.1007/BF00958931