ulf drechsel - Academia.edu (original) (raw)
Papers by ulf drechsel
Pybio, May 1, 2018
Agradecimientos Ell segundo autor agradece a Diego Heisecke de la estancia Laguna Ciervo, por el ... more Agradecimientos Ell segundo autor agradece a Diego Heisecke de la estancia Laguna Ciervo, por el permiso de realizer estudios en su propiedad y a Oscar Rodríguez por apoyo logístico.
The biology and immature stages of Eurata helena Herrich-Schaffer, (1854) are described. In the w... more The biology and immature stages of Eurata helena Herrich-Schaffer, (1854) are described. In the wild a last instar larva was found in the in the Paraguayan department of Cordillera. The resulting female was successfully mated with a wild male. In the laboratory larvae were fed with artificial food. Generation (oviposition to imago) lasted 51 days. Egg, larval instars, cocoon, pupa and adults are illustrated. Resumen: Se describen los estadios inmaduros de Eurata helena Herrich-Schaffer, (1854). En la naturaleza una larva del ultimo estadio fue encontrada en Paraguay, en el departamento de Cordillera. La hembra resultante se apareo con exito con un macho salvaje. En el laboratorio se alimentaron las larvas con alimento artificial. Generacion (oviposicion a imago) duro 51 dias. Huevo, estadios larvales, capullo, pupa y adultos se ilustran. Zusammenfassung: Die Entwicklungsstadien von Eurata helena Herrich-Schaffer, (1854) werden beschrieben. In freier Wildbahn wurde eine Raupe im letz...
Twice overwintering of cocoons of Rothschildia schreiteriana Breyer & Orfila, 1945 of Paraguayan ... more Twice overwintering of cocoons of Rothschildia schreiteriana Breyer & Orfila, 1945 of Paraguayan origin is reported. In the wild, cocoons were found in the department of Boqueron in southwestern Chaco. Hostplant is Vallesia glabra (Cav.) Link (Apocynaceae). Hostplant, cocoon and adults are illustrated. Resumen: Se informa de doble hibernacion de capullos de Rothschildia schreiteriana Breyer y Orfila, 1945 de origen paraguayo. Los capullos se encontraron en el departamento de Boqueron, en el suroeste del Chaco. Planta hospedera es Vallesia glabra (Cav.) Link (Apocynaceae). Planta hospedera, capullo y adultos se ilustran. Zusammenfassung: Zweimaliges Uberwintern von Kokons von Rothschildia schreiteriana Breyer y Orfila, 1945 paraguayischen Ursprungs wird gemeldet. Die Kokons wurden im Departament von Boqueron im sudwestlichen Chaco gefunden. Die Wirtspflanze ist Vallesia glabra (Cav.) Link (Apocynaceae). Fotographien von Wirtspflanze, Kokon, und Imagos werden gegeben.
Parachartergus smithii (de Saussure), a widespread neotropical species of social wasp, is recorde... more Parachartergus smithii (de Saussure), a widespread neotropical species of social wasp, is recorded from Paraguay for the first time. Resumen: Parachartergus smithii (de Saussure), una especie neotropical de avispa social ampliamente distribuida, es reportada por primera vez de Paraguay. Zusammenfassung: Parachartergus smithii (de Saussure), eine in der Neotopis weit verbreitete soziale Wespenart wird zum ersten Male aus Paraguay gemeldet.
The immature stages of Euclera rubricincta (Burmeister, 1878) are described. In the wild a female... more The immature stages of Euclera rubricincta (Burmeister, 1878) are described. In the wild a female was found in the Paraguayan Chaco in the department of Presidente Hayes. In the laboratory the larvae were fed with artificial food. Generation (oviposition to imago) lasted 74 days. Egg, larval instars, cocoon, pupa and adults are illustrated. Resumen: Se describen los estadios inmaduros de Euclera rubricincta (Burmeister, 1878). En la naturaleza una hembra fue encontrada en el Chaco paraguayo, en el departamento de Presidente Hayes. En el laboratorio se alimentaron las larvas con alimento artificial. Generacion (oviposicion a imago) duro 74 dias. Huevo, estadios larvales, capullo, pupa y adultos se ilustran. Zusammenfassung: Die Entwicklungsstadien von Euclera rubricincta (Burmeister, 1878) werden beschrieben. In freier Wildbahn wurde ein Weibchen im paraguayischen Chaco im Departament von Presidente Hayes gefunden. Im Labor wurden die Larven mit kunstlicher Nahrung gefuttert. Generat...
Parachartergus smithii (de Saussure), a widespread neotropical species of social wasp, is recorde... more Parachartergus smithii (de Saussure), a widespread neotropical species of social wasp, is recorded from Paraguay for the first time.
Deutsche Entomologische Zeitschrift, 1972
Studies on Neotropical Fauna and Environment, 2007
The pantropical subtribe Megacephalina represented by more than 100 species is the most diverse o... more The pantropical subtribe Megacephalina represented by more than 100 species is the most diverse of the basal cicindelid groups. Today, most taxonomists recognize eight genera within the subtribe. This is in contrast to Horn who, back in 1910, conceded only two genus-level taxa: the monospecific Aniara and Megacephala sensu Horn (a genus which united the seven other taxa). In the present study we provide a molecular phylogeny of Megacephalina based on the nuclear 18S and the mitochondrial 16S and cytochrome oxidase III genes. The dataset includes 60 specimens of more than 40 mostly South American and Australian taxa. Three cicindelid species of derived lineages were used as outgroups. The resulting phylogenetic trees are basically in agreement with the current classification system. Megacephala and Grammognatha are placed basal in the dendrogram. Pseudotetracha and Australicapitona form a monophyletic Australian clade. Phaeoxantha, Tetracha and Aniara also form a monophyletic group. The position of Metriocheila remains uncertain. The most striking deviation from the traditional classification is the well-supported placement of Aniara within Tetracha, rendering the latter a paraphyletic taxon. Several monophyletic subgeneric species groups are observed in Pseudotetracha, Phaeoxantha and Tetracha/Aniara. Within the latter the monophyletic sobrina, carolina and brasiliensis clades together represent a monophyletic group. Additionally, habitat types were assigned to the taxa and mapped on the phylogenetic tree. The basal African species inhabit non-flooded uplands. The Australian species moved to inland and/or coastal salt plains. The American groups were most likely first confined to river margins and then colonized secondarily and independently nonflooded uplands and/or coastal habitats.
Pybio, May 1, 2018
Agradecimientos Ell segundo autor agradece a Diego Heisecke de la estancia Laguna Ciervo, por el ... more Agradecimientos Ell segundo autor agradece a Diego Heisecke de la estancia Laguna Ciervo, por el permiso de realizer estudios en su propiedad y a Oscar Rodríguez por apoyo logístico.
The biology and immature stages of Eurata helena Herrich-Schaffer, (1854) are described. In the w... more The biology and immature stages of Eurata helena Herrich-Schaffer, (1854) are described. In the wild a last instar larva was found in the in the Paraguayan department of Cordillera. The resulting female was successfully mated with a wild male. In the laboratory larvae were fed with artificial food. Generation (oviposition to imago) lasted 51 days. Egg, larval instars, cocoon, pupa and adults are illustrated. Resumen: Se describen los estadios inmaduros de Eurata helena Herrich-Schaffer, (1854). En la naturaleza una larva del ultimo estadio fue encontrada en Paraguay, en el departamento de Cordillera. La hembra resultante se apareo con exito con un macho salvaje. En el laboratorio se alimentaron las larvas con alimento artificial. Generacion (oviposicion a imago) duro 51 dias. Huevo, estadios larvales, capullo, pupa y adultos se ilustran. Zusammenfassung: Die Entwicklungsstadien von Eurata helena Herrich-Schaffer, (1854) werden beschrieben. In freier Wildbahn wurde eine Raupe im letz...
Twice overwintering of cocoons of Rothschildia schreiteriana Breyer & Orfila, 1945 of Paraguayan ... more Twice overwintering of cocoons of Rothschildia schreiteriana Breyer & Orfila, 1945 of Paraguayan origin is reported. In the wild, cocoons were found in the department of Boqueron in southwestern Chaco. Hostplant is Vallesia glabra (Cav.) Link (Apocynaceae). Hostplant, cocoon and adults are illustrated. Resumen: Se informa de doble hibernacion de capullos de Rothschildia schreiteriana Breyer y Orfila, 1945 de origen paraguayo. Los capullos se encontraron en el departamento de Boqueron, en el suroeste del Chaco. Planta hospedera es Vallesia glabra (Cav.) Link (Apocynaceae). Planta hospedera, capullo y adultos se ilustran. Zusammenfassung: Zweimaliges Uberwintern von Kokons von Rothschildia schreiteriana Breyer y Orfila, 1945 paraguayischen Ursprungs wird gemeldet. Die Kokons wurden im Departament von Boqueron im sudwestlichen Chaco gefunden. Die Wirtspflanze ist Vallesia glabra (Cav.) Link (Apocynaceae). Fotographien von Wirtspflanze, Kokon, und Imagos werden gegeben.
Parachartergus smithii (de Saussure), a widespread neotropical species of social wasp, is recorde... more Parachartergus smithii (de Saussure), a widespread neotropical species of social wasp, is recorded from Paraguay for the first time. Resumen: Parachartergus smithii (de Saussure), una especie neotropical de avispa social ampliamente distribuida, es reportada por primera vez de Paraguay. Zusammenfassung: Parachartergus smithii (de Saussure), eine in der Neotopis weit verbreitete soziale Wespenart wird zum ersten Male aus Paraguay gemeldet.
The immature stages of Euclera rubricincta (Burmeister, 1878) are described. In the wild a female... more The immature stages of Euclera rubricincta (Burmeister, 1878) are described. In the wild a female was found in the Paraguayan Chaco in the department of Presidente Hayes. In the laboratory the larvae were fed with artificial food. Generation (oviposition to imago) lasted 74 days. Egg, larval instars, cocoon, pupa and adults are illustrated. Resumen: Se describen los estadios inmaduros de Euclera rubricincta (Burmeister, 1878). En la naturaleza una hembra fue encontrada en el Chaco paraguayo, en el departamento de Presidente Hayes. En el laboratorio se alimentaron las larvas con alimento artificial. Generacion (oviposicion a imago) duro 74 dias. Huevo, estadios larvales, capullo, pupa y adultos se ilustran. Zusammenfassung: Die Entwicklungsstadien von Euclera rubricincta (Burmeister, 1878) werden beschrieben. In freier Wildbahn wurde ein Weibchen im paraguayischen Chaco im Departament von Presidente Hayes gefunden. Im Labor wurden die Larven mit kunstlicher Nahrung gefuttert. Generat...
Parachartergus smithii (de Saussure), a widespread neotropical species of social wasp, is recorde... more Parachartergus smithii (de Saussure), a widespread neotropical species of social wasp, is recorded from Paraguay for the first time.
Deutsche Entomologische Zeitschrift, 1972
Studies on Neotropical Fauna and Environment, 2007
The pantropical subtribe Megacephalina represented by more than 100 species is the most diverse o... more The pantropical subtribe Megacephalina represented by more than 100 species is the most diverse of the basal cicindelid groups. Today, most taxonomists recognize eight genera within the subtribe. This is in contrast to Horn who, back in 1910, conceded only two genus-level taxa: the monospecific Aniara and Megacephala sensu Horn (a genus which united the seven other taxa). In the present study we provide a molecular phylogeny of Megacephalina based on the nuclear 18S and the mitochondrial 16S and cytochrome oxidase III genes. The dataset includes 60 specimens of more than 40 mostly South American and Australian taxa. Three cicindelid species of derived lineages were used as outgroups. The resulting phylogenetic trees are basically in agreement with the current classification system. Megacephala and Grammognatha are placed basal in the dendrogram. Pseudotetracha and Australicapitona form a monophyletic Australian clade. Phaeoxantha, Tetracha and Aniara also form a monophyletic group. The position of Metriocheila remains uncertain. The most striking deviation from the traditional classification is the well-supported placement of Aniara within Tetracha, rendering the latter a paraphyletic taxon. Several monophyletic subgeneric species groups are observed in Pseudotetracha, Phaeoxantha and Tetracha/Aniara. Within the latter the monophyletic sobrina, carolina and brasiliensis clades together represent a monophyletic group. Additionally, habitat types were assigned to the taxa and mapped on the phylogenetic tree. The basal African species inhabit non-flooded uplands. The Australian species moved to inland and/or coastal salt plains. The American groups were most likely first confined to river margins and then colonized secondarily and independently nonflooded uplands and/or coastal habitats.