Diorhabda elongata

Tracy, James L. & Robbins, Thomas O., 2009, Taxonomic revision and biogeography of the Tamarix-feeding Diorhabda elongata (Brullé, 1832) species group (Coleoptera: Chrysomelidae: Galerucinae: Galerucini) and analysis of their potential in biological control of Tamarisk, Zootaxa 2101 (1), pp. 1-152 : 39

Key to the Sexes of the Diorhabda elongata Group: Adult External Characters

1. Distinct apical notch present on last visible abdominal sternite ( Fig. 10 ). Third bi-lobed tarsomere of foretarsus 0.48–0.65 times the length of the fifth (final) tarsomere ( Fig. 12 ) ....................................................................... male

- Apical notch absent on last visible abdominal sternite ( Fig. 11 ). Third bi-lobed tarsomere of foretarsus 0.28–0.44 times the length of the fifth tarsomere ( Fig. 13 ) ................................................................................................. female

Figures

FIGURES 10–13. Sexual dimorphism in Diorhabda elongata: 10—male last visible sternite, 11—female last visible sternite, 12—male foretarsus, 13—female foretarsus. AN—apical notch, T3—third bi-lobed tarsal segment, T5—fifth tarsal segment. Scale bars 1.0 mm.