Librelula, PETRULEVIČIUS, 2020

PETRULEVIČIUS, JULIÁN F., 2020, First argiolestid damselfly (Odonata: Zygoptera) from the late Palaeocene of Northwest Argentina, Palaeoentomology 3 (6), pp. 541-545 : 541

Genus Librelula gen. nov.

Type species. Librelula maradoniana sp. nov.

Etymology. Wordplay from Castilian words libélula, meaning Odonata , and libre, meaning free; Lula.

Diagnosis. (1) pterostigma relatively shortened; (2) tendency to alignment of crossveins; (3) bases of veins RP3/4 and IR2 between levels of nodus and subnodus; (4) branches of RP diverging distally (supplementary sectors); (5) cubital area with two rows of cells; (6) supplementary sectors between medial veins; (7) pterostigma covering three and a half cells; (8) IR2 originating one and a half cells basal to subnodus; (9) distal side of discoidal cell less than twice basal side; (10) CuP+AA emerging from wing margin basal to Ax2; (11) RP3/4 reaching level of pterostigma.

Characters 1–3 present in Coenagrionomorpha Bechly (2007). Character 4 present in Argiolestinae sensu Bechly (2007) . Character 5 present in some Argiolestinae sensu Kalkman & Theischinger (2013) . The combination of characters 6 to 11 is unique.