Aeshna cornigera, Brauer, 1865

DeMarmels, Jurg, 1992, Dragonflies (Odonata) From The Sierras Of Tapirapeco And Unturan, In The Extreme South Of Venezuela, Acta Biologica Venezuelica 14 (1), pp. 57-78: 64

publication ID

http://doi.org/ 10.5281/zenodo.3266063

DOI

http://doi.org/10.5281/zenodo.4391218

persistent identifier

http://treatment.plazi.org/id/0B24F87C-FFBF-FFB1-FF08-B99EC1822163

treatment provided by

Jeremy

scientific name

Aeshna cornigera
status

 

Aeshna cornigera  planaltica Calvert, 1952

Figures 47-48View Plate VI (larva)

Material. 1♂ (reared from last instar larva). TamacuariGoogleMaps  .

Larva. This single specimen is the only one know to me of the pantepuyan form of planaltica. It differs from a typical Brazilian planaltica (♂, ultimate instar exuviae, Rio Grande so SuI, sep 1985) kindly furnished to me by Prof. Dr. A.B.M. Machado, Belo Horizonte, as well as from ordi­ nary North Venezuelan cornigera  cornigera  des­ cribed by DeMarmels (1982): In the Tamacuari specimen, the prementum surpasses posteriorly the middle coxae ( Fig. 47View Plate VI), while in the Brazilian c;xample it ends already between the middle co­ xae. The male lamina  at the base of the epiproct is close to half as long as the latter, and sharply pointed in the Tamacuari larva ( Fig. 48View Plate VI); this la. mina is obviously shorter than half the epiproct and more bluntly tipped in cornigera  cornigera  .

Measurements (Tamacuari). Total length 34.5; maximum width of head across compound eyes 8.0; hind femur 6.0; hind tibia 6.7.

Remarks. The single larva was found in a small mountain creek in the forest, together with many larvae of Neocordulia biancoi  (see below). Unfor. tunately, the adult male escaped after having been kept alive for maturation during two days.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Odonata

Family

Aeshnidae

Genus

Aeshna