Diagnostic characteristics for distinguishing adult females of Ischnura fluviatilis and I. ramburii (Odonata: Coenagrionidae)

Jim T. Johnson; Kenneth J. Tennessen

doi:10.60024/nodo.v10i3.a3

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Jim T. Johnson,¹ Kenneth J. Tennessen²

¹3003 Unander Avenue, Vancouver, WA 98660, USA;
²PO Box 585, Wautoma, WI 54982, USA;

Abstract

Adult females of Ischnura fluviatilis can be distinguished structurally from I. ramburii by the presence of small pits on the middle lobe of the prothorax (absent in I. ramburii) and the hind margin of the prothoracic hind lobe curved and directed posteriorly (straight, directed posterodorsally in I. ramburii). Color pattern differences between immature females of both species are discussed; color differences between mature females are considered equivocal.

Citation Download Citation

Jim T. Johnson and Kenneth J. Tennessen "Diagnostic characteristics for distinguishing adult females of Ischnura fluviatilis and I. ramburii (Odonata: Coenagrionidae)," Notulae odonatologicae 10(3), 79-85, (6 June 2024). https://doi.org/10.60024/nodo.v10i3.a3

Received: 3 February 2024; Published: 6 June 2024

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