Belkys Yubiry Pérez-García

Universidad de Carabobo, UC · Department of Biology (FACYT)

A species of Baetidae, Camelobaetidius patricki is reported for the first time for Venezuela. New state records are given for Camelobaetidius edmundsi, Prebaetodes meredinensis, and Varipes sancarlos. Drawings and photographs illustrating the nymphal diagnostic characters of each species are provided. With the new record of C. patricki, the list of...

The wide distribution of Anopheles albitarsis F in Venezuela has been confirmed recently, a species of the Albitarsis Complex yet to be formally described. Morphometric studies are essential to develop illustrated keys for species identification. To contribute to the morphologic characterization of Anopheles albitarsis F from Venezuela, a tradition...

The wide distribution of Anopheles albitarsis F in Venezuela has been confirmed recently, a species of the Albitarsis Complex yet to be formally described. Morphometric studies are essential to develop illustrated keys for species identification. To contribute to the morphologic characterization of Anopheles albitarsis F from Venezuela, a tradition...

Tricorythodes guayabito sp. nov. is described and illustrated based on nymphs from Venezuela. The genus Vacupernius Wiersema and McCafferty, 2000 and the species Vacupernius packeri (Allen, 1967) are also recorded for first time from Venezuela. With this records, the number of species of Leptohyphidae in Venezuela increases from 10 to 12 species.

New records for Thraulodes marreroi in Venezuela are reported and their potential geographical distribution in the Neotropics is analyzed using the ecological niche model, using the Maximum Entropy algorithm (MaxEnt), based on reports in Brazil, Panama and Venezuela. Descriptions are included about the lotic habitat and the phytogeographic subregio...

La cuenca endorreica del Lago de Valencia es una depresión intramontana de origen tectónico demarcada por las serranías del Litoral y del Interior de la cordillera de la Costa, dentro de la cual discurren 21 tributarios, entre cursos naturales y canales artificiales. El presente estudio aborda dos temáticas para esta región hidrográfica: la primera...

Phylloicus bromeliarium (Trichoptera: Calamoceratidae) es registrada por primera vez en Venezuela. Larvas de esta especie fueron recolectadas en brácteas de la fitotelmata Guzmania cylindrica (Bromeliaceae), dentro de un bosque nublado a 2000 m.s.n.m.

Aquatic macroinvertebrates and organic matter (OM) are transported downstream with the current, in a process that is modulated by different mechanisms in the ecosystem. Macroinvertebrate drift and OM transport are processes involving interactions between organisms and the environment at multiple spatial and temporal scales. The objective of this st...

In order to increase knowledge on leptophlebiid mayfly biodiversity in Venezuela, we report new locations for Thraulodes eduardorum Medina and Pérez, 2010. To achieve effective identification, the last instars were collected and reared in the laboratory in order to associate them with the imagoes. This report expands the distribution range, and red...

Se registran por primera vez los géneros Callibaetis Eaton y Paracloeodes Day para Venezuela y se añade una nueva localidad para Mayobaetis Mayo. Callibaetis radiatus Navas, 1920 se logró identificar a partir de ninfas criadas hasta la emergencia de los adultos; Paracloeodes pakawara Nieto and Salles, 2006 y Mayobaetis ellenae (Mayo, 1973), con bas...

Callibaetis Eaton, and Paracloeodes Day are for first time reported from Venezuela and Mayobaetis Mayo present a new locality. Callibaetis radiatus Navas, 1920 was identified from reared adults associated with their nymphal exuviae; Paracloeodes pakawara Nieto and Salles, 2006 and Mayobaetis ellenae (May 1973), were identified from nymphs. The samp...

Research on mayflies biogeography in the American continent have been generally narrative, proposing centers of origin and dispersal routes, suggesting distribution patterns for certain genera. Few researches have addressed the species level. In order to determine potential distribution patterns for species of Thraulodes, we used MaxEnt (Maximum E...

Asthenopus angelae is reported for the first time from Venezuela, extending its distribution to the Orinoco River basin. Habitat type and limnological characteristics of the sampling locality (Laguna Larga, Cinaruco river, Apure state) are described. The morphology of the nymphs and a male subimago are illustrated.

The genus Varipes is reported for the first time for Venezuela. a new species of the genus Varipes is described. Nymphs of V. sancarlos n. sp. were collected in the San Carlos river, Cojedes. The morphology of the nymphs similar to descriptions of other Varipes species. Physical habitat and water quality conditions at the San Carlos River suggest t...

The genus Varipes is reported for the first time for Venezuela. A new species of the genus Varipes is described.Nymphs of V. sancarlos n. sp. were collected in the San Carlos River, Cojedes. The morphology of the nymphs similar to descriptions of other Varipes species. Physical habitat and water quality conditions at the San Carlos River suggest th...

The mayfly fauna of an Andean tropical headwater stream was sampled every fifteen days during one year, and seasonal changes in density were recordered and compared to rainfall values. Even though seasonal changes of total density of genera of Ephemeroptera showed a negative correlation with rainfall values, any correlation was observed for individ...

Medina BA, Pérez BY. 2010. Thraulodes eduardorum (Ephemeroptera: Leptophlebiidae) new species for Venezuela. Entomotropica 25(2): 49-61. The male and female adults and nymphs from a new species of Thraulodes Ulmer (Ephemeroptera: Leptophlebiidae) were described. The nymphal instar was collected in the Cabriales y Cúpira streams from Carabobo State,...

La composición de los macroinvertebrados bentónicos en hábitats de río, está in?uenciada principalmente por la calidad del sustrato y la velocidad de la corriente. Los rápidos son hábitats lóticos estables, con sustratos heterogéneos y acumulación de detritus, que deben albergar comunidades más abundantes y diversas. Sin embargo en los ríos de mont...

The composition of the benthic macroinvertebrates in stream habitats is in.uenced mainly by the quality of the substrate and the current. The ri.es are stable lotic habitats, with heterogeneous substrates and detritus accumulation that should maintain abundant and diverse communities. However, in mountain streams diversity doesn't seem to differ am...

El establecimiento de relaciones entre las modalidades de ingreso (CNU y PAI) y el rendimiento estudiantil (Escuelas de Biología y Computación de la UCV) en cuanto a las características contextuales y el rendimiento académico en los dos primeros semestres, fue realizado mediante un estudio documental, con las relaciones de variación (cajas múltiple...

The composition, seasonal variation and diversity of the mayfly fauna in four streams (two watersheds) of the Guatopo National Park were studied biweekly for one year (February 1996-February 1997). The density of the Ephemeroptera has a distinctive cycle with maximum abundance at the middle of the dry season and minimum during the rainy season. The...

El presente estudio documental tuvo por objetivo caracterizar el desempeño en la educación básica y media diversificada, en el proceso de selección nacional y en su rendimiento por modalidad de ingreso (Escuelas de Biología y de Computación). Se realizó con propósitos descriptivos, empleando variables de entrada (contexto y cognoscitivas) y de sali...

Mecanografiado Tesis (Magister Scientiae) -- Universidad de Los Andes, Facultad de Ciencias, Instituto de Ciencias Ambientales y Ecológicas, Postgrado en Ecología Tropical, Mérida, 2002 Incluye bibliografía