Sex ratio and sexual dimorphism in late instar larvae of Ischnura posita (Hagen) (Zygoptera: Coenagrionidae)
Notulae odonatologicae , Volume 3 - Issue 3 p. 40- 41
The evidence presented indicates that I. posita larvae do not exhibit the skewed sex ratios as reported for Anisoptera. Mean head widths in the Texas population studied are substantially lower than the range reported by E.M. WALKER (1933, The Odonata of Canada and Alaska, vol. I, Univ. Toronto Press). For the first time sexual dimorphism is suggested in the larval stage of this sp.
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L.R. Shaffer, & J.V. Robinson. (1989). Sex ratio and sexual dimorphism in late instar larvae of Ischnura posita (Hagen) (Zygoptera: Coenagrionidae). Notulae odonatologicae, 3(3), 40–41.
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