Chaetauchenium Tschitchérine, 1900 (Carabidae: Pterostichini) a new species and new status for a lineage from the Valdivian temperate rainforest Chaetauchenium Tschitchérine, 1900 (Carabidae: Pterostichini), nueva especie y nuevo estado para un linaje del bosque tropical valdiviano
A new species Chaetauchenium loki, is described from Parque Oncol in Chile. This species, C. convexipennis (Fairmaire) and Parhypates (Antarctobium) magellanicum (Fairmaire) share a combination of features distinct from all other species attributed to Parhypates and from all other species of South A...
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| Format: | Article in Journal/Newspaper |
| Language: | English Spanish |
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Universidad de Concepción
2011
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| Online Access: | https://doaj.org/article/2dc3353817184c5fa4a3a4b1f3275ead |
| Summary: | A new species Chaetauchenium loki, is described from Parque Oncol in Chile. This species, C. convexipennis (Fairmaire) and Parhypates (Antarctobium) magellanicum (Fairmaire) share a combination of features distinct from all other species attributed to Parhypates and from all other species of South American Pterostichini. To reflect this, Chaetauchenium is elevated as a distinct genus and Antarctobium is considered congeneric. Individuals of these species have highly variable and unusual patterns of supernumerary or reduced numbers of setae and variation in secondary sexual characters. Males have denticulate and falciform aedeagal parameres and females have a digitiform diverticula at the base of the spermatheca. These genital and reproductive tract features are not known from any South American pterostichine species, but are found in many Australian, New Zealand and New Caledonian species. Se describe Chaetauchenium loki, una nueva especie del Parque Oncol en Chile. Esta especie, junto con C. convexipennis (Fairmaire) y Parhypates (Antarctobium) magellanicum (Fairmaire) comparte una combinación de caracteres distintos al resto de especies asignadas a Parhypates y al resto de Pterostichini sudamericanos. Atendiendo a estos caracteres morfológicos se eleva Chaetauchenium a género, que incluye además Antarctobium. Los individuos de estas especies presentan patrones altamente variables y poco frecuentes de un elevado o reducido número de sedas, y variabilidad de los caracteres sexuales secundarios. Los machos tienen parámeros del edeago denticulados y falciformes y las hembras tienen divertículos digitiformes en la base de la espermateca. Estos caracteres de la genitalia y del tracto reproductivo son desconocidos en otros pterostichinos sudamericanos, pero se hallan en muchas especies de Australia, Nueva Zelanda y Nueva Caledonia. |
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