Lesser Elaenia (1 Viewer)

[Richard Klim]

Rheindt, Krabbe, Wee & Christidis 2015. Cryptic speciation in the Lesser Elaenia Elaenia chiriquensis (Aves: Passeriformes: Tyrannidae). Zootaxa 4032(3): 251–263. [abstract & preview]

• Coopmans's Elaenia Elaenia [chiriquensis] brachyptera

Ridgely & Tudor 2009 (Birds of South America: Passerines)...

... in nw. Ecuador and sw. Colombia (likely not same species) gives a very different burry "bweer, wheéb, wher'r'r'r" (P. Coopmans). ...
Recent evidence (fide P. Coopmans) indicates that the form of Elaenia chiriquensis (Lesser Elaenia) found in sw. Colombia and nw. Ecuador, brachyptera, although not dissimilar morphologically from other races of the species (e.g., albivertex), differs strikingly in its primary vocalization. It likely merits full species status.

AOU-SACC...

10b. Ridgely & Greenfield (2001) suggested that the subspecies brachyptera might deserve recognition as a separate species from Elaenia chiriquensis based on vocal differences. Rheindt et al. (2008a) supported species rank for brachyptera based on genetic distance. SACC proposal needed.

Hosner et al 2013 (HBW Alive)...

Race brachyptera is slightly smaller, with darker, more brownish-olive upperparts, greyer breast;

 

[Peter Kovalik]

Rheindt, Krabbe, Wee & Christidis 2015. Cryptic speciation in the Lesser Elaenia Elaenia chiriquensis (Aves: Passeriformes: Tyrannidae). Zootaxa 4032(3): 251–263. [abstract & preview]

• Coopmans's Elaenia Elaenia [chiriquensis] brachyptera

IOC Update Diary

Oct 16 Post proposed split of Coopmans’s Elaenia on Updates/PS

 

[Richard Klim]

AOU-SACC (17 Oct 2015)...

10b. ... Rheindt et al. (2015) found that that brachyptera should be ranked as a separate species based on voice and genetic distance. SACC proposal badly needed.

 

[Richard Klim]

SACC proposal

AOU-SACC Proposal #686 (Stotz, Oct 2015): Treat Elaenia brachyptera as a separate species from Elaenia chiriquensis.

 

[Peter Kovalik]

AOU-SACC Proposal #686 (Stotz, Oct 2015): Treat Elaenia brachyptera as a separate species from Elaenia chiriquensis.

PASSED (31 Jan 2016)

 

[Peter Kovalik]

Elaenia brachyptera

IOC Update Diary

Oct 16 Post proposed split of Coopmans’s Elaenia on Updates/PS

IOC Update Diary Feb 2

Accept Coopmans’s Elaenia

 

[Richard Klim]

Rheindt et al 2015 pdf

Rheindt, Krabbe, Wee & Christidis 2015. Cryptic speciation in the Lesser Elaenia Elaenia chiriquensis (Aves: Passeriformes: Tyrannidae). Zootaxa 4032(3): 251–263. [abstract & preview]

Rheindt et al 2015. [pdf]

 

[Peter Kovalik]

Coopman's Elaenia

Rheindt, Krabbe, Wee & Christidis 2015. Cryptic speciation in the Lesser Elaenia Elaenia chiriquensis (Aves: Passeriformes: Tyrannidae). Zootaxa 4032(3): 251–263. [abstract & preview]

TiF Update February 14:

Coopman's Elaenia, Elaenia brachyptera, has been split from Lesser Elaenia, Elaenia chiriquensis, based on Rheindt et al. (2015).

 

[Peter Kovalik]

Elaenia spp

FREITAS, Eliane Luiz de. Variação morfométrica e filogenia molecular de três espécies de Elaenia (Tyrannidae, aves). 2016. 74 f., il. Dissertação (Mestrado em Biologia Animal)—Universidade de Brasília, Brasília, 2016.

Abstract:

Passeriformes order has about 60% of all bird species. This order is one of the most difficult to understand the phylogenetic relationships among taxa due to minimal morphological differences, these difficulties extend to families and genera. The Elaenia genus composed of 18 species and 38 subspecies, which shown uniform morphology, characterized by olive coloring and little variation in the color of the crest, ranging from white to yellow. These species are widely distributed in the Americas, many of which has large area of overlap of their distributions. The difficulty of morphological differentiation between some taxa of this genus makes identification of these species a difficult task in areas of sympatric. Furthermore, the possible occurrence of hybrids can further complicate the differentiation of these taxa. This study aims to determine the level of morphometric and hybrid occurrence between three species of the genus Elaenia: E. cristata, E. chiriquensis and E. flavogaster. For morphometric analysis, we collected 636 individuals of the three species. Six morphological measurements of each individual were performed. The level of morphometric differentiation of species was identified by multivariate variance Tests - MANOVA, analysis of variance - ANOVA followed by Tukey's test, linear discriminant analysis - LDA, construction and validation of the attribution model. Misidentification and possible hybrids were investigated by analyzing the sequence variation of mitochondrial gene ND2, we selected 99 individuals from the three target species sampled in the field. There was a statistically significant morphometric difference between E. chiriquensis and E. cristata and E. flavogaster. The attribution model had 83% correct performance of correct assignments for E. chiriquensis, 81% for E. flavogaster and 76% for E. cristata. Phylogenetic reconstructions were created using maximum likelihood and Bayesian Inference. Results indicated independents lineages for all three species. The estimated time of divergence between the lineages was approximately 7.82 million years for E. cristata, 3.91 million years for E. flavogaster and 3.39 million years for E. chiriquensis. Some individuals morphologically identified in the field as E. flavogaster and E. cristata shared the same haplotype for E. chiriquensis lineage for mitochondrial gene ND2. Misidentification, hybrids occurrence or possible sexual dimorphism may be explanations for these cases.

[pdf]