Oreiallagma oreas (Ris, 1918) is a recently rediscovered Colombian Andean endemic species, for which the information available is very scarce. It was originally described from a single male. Since 2008, O. oreas has been recorded in new localities but its life history remained unknown. Here we describe and diagnose the species female for the first…
The family Philogeniidae was recently proposed as a monophyletic clade grouping the genera Philogenia and Archaeopodagrion. Here, two new species found during recent expeditions to the Western Colombian Andes are described, Archaeopodagrion fernandoi sp. nov. and Philogenia martae sp. nov. Also, Philogenia zeteki is recorded for the first time in Colombia. Natural history notes, a…
To date 57 species of Telebasis have been described. Most are Neotropical species, only three extending North of Mexico. From Peru 17 species were known. Most are found in the Amazonian lowlands; two are known from higher elevations in the Andes. From Brazil 26 species were known. In this article another Neotropical species is described,…
Robust male condition must be favored and should be signaled to conspecifics via enhanced aggression and more highly expressed ornamental traits. One way that such robust condition, and thereby the expression of aggression and ornamental traits, can be assessed is via survival. In odonate adults, condition (in the form of lipid reserves, muscle mass and…
How species respond to shifting environmental conditions is a central question in ecology, especially because ecosystems are experiencing rapidly changing climatic conditions. However, predicting the responses of species interactions and community composition to changing conditions is often difficult. We examined the effects of rearing temperature and resource level on larval survival of two ecologically similar…
At a wetland in southeastern Mexico a female of Telebasis filiola was observed and photographed preying on a small web-building spider of the genus Leucauge. This is the first record of gleaning by a representative of the genus Telebasis. A brief discussion on this subject in other odonates is provided.
Recent findings suggest that postmating prezygotic isolation (i.e. gametic barriers) could be an important factor preventing hybrid formation. Competitive gametic barriers emerge when a female is inseminated by a conspecific and a heterospecific male. We examined whether sperm proportions after double matings and copulation duration impede hybrid formation. For this, we used females of Ischnura…
The larva of Argia percellulata is described and figured. It falls into the group of Argia larvae with a very prominent ligula and one palpal seta, but differs from its closest relatives by having tibiae usually with two well-defined dark rings, posterior margin of sternite 6 smooth, and posterior margin of sternite 7 smooth medially…
Of the approximately 439 species of Odonata known from North America, north of Mexico, comments on 25 species (6%) of conservation concern are given. Species deemed to be under the most threat are Ischnura gemina, Gomphus sandrius, Ophiogompbus australis, Stylurus potulentus, and Libellula jesseana. Two other species not under threat, Neurocordulia micbaeli and Somatochlora brevicincta,…