The taxonomic status of the Italian Sparrow Passer italiae (Vieillot 1817): Speciation by stabilised hybridisation? A critical analysis

  title={The taxonomic status of the Italian Sparrow Passer italiae (Vieillot 1817): Speciation by stabilised hybridisation? A critical analysis},
  author={Till T{\"o}pfer},
  • T. Töpfer
  • Published 28 September 2006
  • Biology
  • Zootaxa
Since its descriptio n the taxonomic status of the Italian Sparro w Passer italiae (Vieillot 1817) has changed repeatedly according to the speciation concept s ap lied. Due to external similaritie s with hybrid sparrow individuals the hypothesis that italiae is a stabilised hybrid form between Passer domesticus (L. 1758) and P. hispaniolensis (Temm. 1820) has deeply influenced the discussion although some authors do not even accept hybrid fo rms as taxa. Based upon a comprehensive review of the… 

North African hybrid sparrows (Passer domesticus, P. hispaniolensis) back from oblivion – ecological segregation and asymmetric mitochondrial introgression between parental species

Differences between mitochondrial gene pools of Italian and North African hybrid sparrow populations provide first evidence that different demographic histories have shaped the extant genetic diversity observed on both continents.

Railway-facilitated dispersal of the Spanish Sparrow (Passer hispaniolensis) during its current range expansion in the Pannonian Basin.

Vagrant individuals of the Spanish Sparrow and its hybrid Italian Sparrow occurred significantly closer to railway lines than vagrant Red-rumped Swallows, constitutes an empirical evidence supporting the idea that sparrows tend to rely on railway traffic for long-distance dispersion.

Hybrid speciation in sparrows II: a role for sex chromosomes?

Preliminary evidence presented in this study suggests that sex chromosomes may play a significant role in this case of homoploid hybrid speciation.

Hybrid speciation in sparrows I: phenotypic intermediacy, genetic admixture and barriers to gene flow

It is proposed that an origin of hybrid species where the hybrid lineage gets geographically isolated from its parental species, as seems to have happened in this system, might be more common in nature than previously assumed.

Male plumage variation and its role in reproductive isolation between house sparrows (Passer domesticus) and Italian sparrows (P. italiae) & A new method for quantifying colours of Passer sparrows using digital imaging in the field

This investigation reveals differential selection pressures among plumage traits across the Alps hybrid zone, where selection against individuals with intermediate crown colour most likely plays a role in premating reproductive isolation in this species complex, thereby contributing to homoploid hybrid speciation.

Exploring the hybrid speciation continuum in birds

This work proposes to discriminate between two types of hybrid speciation: type I where reproductive isolation is a direct consequence of hybridization and type II where it is the by‐product of other processes.

Taxonomic recommendations for Western Palearctic birds : 11th report

This paper is the tenth report of the Taxonomic Sub-Committee of the BOU Records Committee and recommends recognition of higher taxa not recognised by Voous (Paroidea), changes in generic allocation (Melanocorypha leucoptera, Calandrella rufescens), and changes in nomenclature.

Long-term trends in first arrival and first egg laying dates of some migrant and resident bird species in northern Italy

It is found that the swift and the barn swallow significantly advanced both arrival and laying dates, whereas all other species did not show any significant temporal trend in either arrival or laying date.

Selection in parental species predicts hybrid evolution

It is found that parental phenotypic divergence patterns can be useful in predicting hybrid evolutionary potential, as predicted when major QTL are involved in species differences.

The Tangled Evolution of Italian Sparrow

When the then 37 years old Dobzhansky wrote these words the problem of identifying a universally acceptable concept of species already had a long and respectable history. Unfortunately, despite much