Cordulegaster

Müller, Ole, Schneider, Thomas, Ikemeyer, Dietmar & Brochard, Christophe, 2023, Description of last instar larva of Cordulegaster kalkmani (Odonata: Cordulegastridae), International Journal of Odonatology 26, pp. 108-113 : 113

Nevertheless , a start has been made:

1 Number of short premental setae ≥ 4 .................... 2 ............................................ ( C. picta & C. kalkmani )

1’ Number of short premental setae <4 .................... 3 .......................... ( C. heros , C. vanbrinkae & C. picta )

2 Number of long premental setae 6 to 7 ....... C. picta

2’ Number of long premental setae 5 ....... C. kalkmani

3 Length of spine on segment 9 ≥ 0.40 mm... C. heros

3’ Length of spine on segment 9 < 0.40 mm................ ......................................... ( C. vanbrinkae & C. picta )

4 Anal pyramid short; length of tergite 10: length of epiproct = 1: <2.1 ............................................... or length of sternite 10: length of paraprocts = 1: <1.4............................................... C. vanbrinkae

4’ Anal pyramid long; length of tergite 10: length of epiproct = 1:> 2.1 ............................................... or length of sternite 10: length of paraprocts = 1: ≥ 1.5 ......................................................... C. picta