Dos nuevas especies de tricópteros filtradores carnívoros de los Balcanes Occidentales.

Investigadores de las Universidades de Viena, Croacia, Alemania, Rumania y Austria trabajaron en conjunto en la descripción de dos nuevas especies de tricópteros pertenecientes al género Drusus en la Península Balcánica.   

Los investigadores también realixaron trabajos sobre la biodiversidad y las amenazas a la fauna acuática endémica de la región. 

Las dos nuevas especies descritas son Drusus krpachi, especie micro endémica de las montañas Korab, Macedonia; y D. malickyi que también se considera micro endémica para la zona de las montañas Prokletije, Albania.

Ambas especies nuevas son similares a D. mecedonicus  pero difieren de este en la forma de segmento IX, la forma de las puntas de los apéndices intermedios en vista lateral, la forma de los apéndices inferiores, y la forma de los parámeros. 

La Subfamilia Drusinae comprende 110 especies en ocho géneros, ecológicamente, muchas especies en estado larval se separan en tres grupos por su forma de alimentarse: carnívoros filtradores, omnívoros trituradores y raspadores hervívoros. Los adultos de cada grupo alimenticio también se separan por una serie de sinapomorfías.

Consulta el artículo completo: Description of two new filtering carnivore Drusus species (Limnephilidae, Drusinae) from the Western Balkans 

Distribución de los Drusinae carnívoros filtradores.

 

From the Western Alps across Central Europe: Postglacial recolonisation of the tufa stream specialist Rhyacophila pubescens (Insecta, Trichoptera)

From the Western Alps across Central Europe: Postglacial recolonisation of the tufa stream specialist Rhyacophila pubescens (Insecta, Trichoptera)
Christine HM Engelhardt, Peter Haase and Steffen U Pauls

Abstract
Background: Dispersal rates, i.e. the effective number of dispersing individuals per unit time, are the product of dispersal capacity, i.e. a species physiological potential for dispersal, dispersal behaviour, i.e. the decision to leave a habitat patch in favour of another, and connectivity of occupied habitat. Thus, dispersal of species that are highly specialised to a certain habitat is limited by habitat availability. Species inhabiting very stable environments may also adopt a sedentary life-style. Both factors should lead to strong genetic differentiation in highly specialised species inhabiting stable environments. These two factors apply to our model species Rhyacophila pubescens a highly specialised freshwater insect that occurs in tufa springs, a very stable habitat.
Results: We examined the genetic population structure and phylogeography using range-wide mtCOI sequence and AFLP data from 333 individuals of R. pubescens. We inferred the location of Pleistocene refugia and postglacial colonisation routes of R. pubescens, and examined ongoing local differentiation. Our results indicate intraregional differentiation with a high number of locally endemic haplotypes, that we attributed to habitat specificity and low dispersal rates of R. pubescens. We observed high levels of genetic diversity south of the Alps and genetic impoverishment north of the Alps. Estimates of migrants placed the refugium and the source of the colonisation in the Dauphiné Alps (SW Alps).
Conclusions: This is the first example of an aquatic insect with a colonisation route along the western margin of the Alps to the Central European highlands. The study also shows that specialisation to a stable environment may have promoted a behavioural shift to decreased dispersal rates, leading to stronger local population differentiation than in less specialised aquatic insects. Alternatively, the occurrence of highly specialised tufa spring habitats may have been more widespread

https://drive.google.com/file/d/0Bxe0ko6tYQawbmtSbnlrZGdyYzg/view?usp=sharing