Description of the final instar larva of argia serva hagein selys, 1865 (Odonata coenagrionidae)

The American genus Argia, with more than 100 species described, is the most speciose genus of Odonata in the world. In this contribution, the final stadium larva of Argia serva, the southernmost distributed species of Argia, is described and diagnosed based on reared material from Martín García island, Buenos Aires, Argentina. The larva of this species can be easily separated from the other Argentinean Argia by the following combination of characters: sternum of S8 covered with spines (bare in A. translata); antennal segment 3 longer than 1+2 (equal to or shorter than 1+2 in A. joergenseni and A. jujuya); palpal setae absent (present in A. croceipennis). A key to the known larvae of Argia of the Southern Cone is provided.Fil: del Palacio, Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Avellaneda. Departamento de Ciencias Ambientales; ArgentinaFil: Lozano, Federico. Universidad Nacional de Avellaneda. Departamento de Ciencias Ambientales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Muzón, Javier. Universidad Nacional de Avellaneda. Departamento de Ciencias Ambientales; Argentin

Acanthagrion hartei sp. nov. from Ecuador (Zygoptera: Coenagrionidae)

The new sp. is described and illustrated. Holotype ♂; Ecuador, Morona, Santiago prov., Bomboiza, 20-IX-1990, deposited in USNM, Washington. It is assigned to the apicale-group, and differs from the other spp. of that group by characters of the ♂ terminalia and genital ligulaInstituto de Limnología "Dr. Raúl A. Ringuelet

Current knowledge of Patagonian Odonata

The Odonata order is represented in Patagonia by 36 species belonging to nine families and 18 genera. The endemicity level is high being approximately 60% of the species and 40% of genera endemic. The specific richness in Patagonia decreases from West to East and from North to South, being Nahuel Buta (Chile) and Andes mountains between 38° and 41° S on the forest area, and the Somuncurá plateau (Argentina) on the steppe the richest areas. An update of its records and an analysis of the main distribution patterns are provided in this paper.El orden Odonata se encuentra representado en la Patagonia por 36 especies, reunidas en nueve familias y 18 géneros. El nivel de endemismo de esta taxocoenosis es alto, aproximadamente el 60% de las especies y casi el 40% de los géneros endémicos. La riqueza específica en la Patagonia decrece de Oeste a Este y de Norte a Sur, las áreas de mayor riqueza resultan ser las cordilleras de Nahuel Buta (Chile) y de los Andes entre 38° y 41° S, y la meseta de Somuncurá (Argentina) en la estepa. Se brinda una actualización del estado de conocimiento y un análisis de los principales patrones de distribución.Instituto de Limnología "Dr. Raúl A. Ringuelet

An updated checklist of the Odonata from Argentina

An updated checklist of the Odonata spp. known to occur in Argentina is presented along with distributional information by province. 27 spp. are removed from previous listings, and 32 new records are added, bringing the total number of spp. to 271. Of the new records, 14 correspond to new spp. currently under description. The distribution of the 17 species presently known to be endemic to Argentina is mapped.Instituto de Limnología "Dr. Raúl A. Ringuelet

A checklist of the dragonflies from the North-Western of Isiboro-Sécure Indian Counntry and National Park, Bolivia

The Isiboro-Secure Indian Country and National Park is located in central-western Bolivia, in the departments of Beni and Cochabamba. The Park includes about 12,363 km² of Yunga rainforest in the Bolivian Amazon. This is the first entomological cheklist and taxonomic study within the park. Twentythree species of odonata are listed (15 Zygoptera and 18 Anisoptera species). Five new records for the countryt and at least three probable new species are recorded.Instituto de Limnología "Dr. Raúl A. Ringuelet

The Odonata (Insecta) of Patagonia: A synopsis of their current status with illustrated keys for their identification

Patagonia is a vast landmass with a distinctive environmental and biotic heterogeneity. Its Odonata biodiversity is the best known of South America, and it is composed of 36 species, of which more than 50% are endemic. We summarize the main taxonomic, distributional and biological information including illustrated keys for adults and known larvae, and distributional maps.Instituto de Limnología "Dr. Raúl A. Ringuelet

A checklist of the dragonflies from the North-Western of Isiboro-Sécure Indian Country and National Park, Bolivia

Fil: Pessacq, Pablo. Centro de Investigaciones Esquel de Montaña y Estepa Patagónicas; ArgentinaFil: Lozano, Federico. Universidad Nacional de Avellaneda. Departamento de Ciencias Ambientales. Laboratorio de Biodiversidad y Genética Ambiental; ArgentinaFil: Muzón, Javier. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología Dr. Raúl A. Ringuelet; Argentin

The Odonata (Insecta) of Patagonia: A synopsis of their current status with illustrated keys for their identification

Patagonia is a vast landmass with a distinctive environmental and biotic heterogeneity. Its Odonata biodiversity is the best known of South America, and it is composed of 36 species, of which more than 50% are endemic. We summarize the main taxonomic, distributional and biological information including illustrated keys for adults and known larvae, and distributional maps.Instituto de Limnología "Dr. Raúl A. Ringuelet

El mundo de las libélulas y su rol en los ecosistemas

Las libélulas poseen muchos otros nombres comunes tales como alguaciles, helicópteros, caballitos del diablo o matapiojos. Han sido extensamente retratadas en las culturas antiguas, que los consideraban insectos especiales, portadores de pureza y anunciadores de grandes lluvias. También dan forma estos insectos a personajes de leyendas de diferentes culturas indígenas y son muy valorados en la cultura japonesa. Este grupo de insectos apareció por primera vez en la Tierra hace aproximadamente 300 millones de años, en el período Paleozoico. En esos tiempos, algunos representantes alcanzaban tamaños enormes, hasta 75 cm de envergadura, mientras que en la actualidad no superan los 15 cm de envergadura alar y los 8 cm de largo. Al día de hoy se conocen aproximadamente 5.600 especies alrededor del mundo, aunque se ha especulado que el número total podría llegar a casi 9.000 especies. Conozcamos ahora como se desarrollan y cuál es su rol en los ecosistemas que habitan

Ischnura ultima Ris, 1908 (Odonata: Coenagrionidae): New records from southern South America

Ischnura ultima Ris, 1908 is recorded for the first time from Buenos Aires Province, Argentina, 750 km southeast from the southernmost previous known localities (Córdoba Province). This finding supports a stronger biogeographical relationship between the southern hills of Buenos Aires (surrounded by the Pampas lowlands) and the Monte province. In addition, this record supports the odonate endemic areas scheme previously proposed for Argentina.Instituto de Limnología "Dr. Raul A. Ringuelet