MORPHOLOGICAL VARIATION AND GENETIC STRUCTURE OF GALAPAGOS DOVE (ZENAIDA GALAPAGOENSIS) POPULATIONS: ISSUES IN CONSERVATION FOR THE GALAPAGOS BIRD FAUNA

2006 ◽  
Vol 118 (2) ◽  
pp. 194-207 ◽  
Author(s):  
DIEGO SANTIAGO-ALARCON ◽  
SUSAN M. TANKSLEY ◽  
PATRICIA G. PARKER
Keyword(s):  
Genetic Structure ◽  
Morphological Variation ◽  
Bird Fauna

scholarly journals Variations in genetic structure and male genitalia suggest recent lineage diversification in the Neotropical dung beetle complex Canthon cyanellus (Scarabaeidae: Scarabaeinae)

2020 ◽  
Vol 131 (3) ◽  
pp. 505-520
Author(s):  
Janet Nolasco-Soto ◽  
Mario E Favila ◽  
Alejandro Espinosa De Los Monteros ◽  
Jorge González-Astorga ◽  
Gonzalo Halffter ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Morphological Variation ◽  
Male Genitalia ◽  
Morphological Variability ◽  
Dung Beetle ◽  
Morphological Characters ◽  
Taxonomic Assignment ◽  
Morphometric Variation ◽  
Evolutionary Forces ◽  
Significant Genetic Structure

Abstract We analysed the genetic divergence and morphology of the aedeagus (i.e. phallobase and parameres) in Canthon cyanellus at different geographical levels. The results from both approaches were compared with the current taxonomic assignment of the C. cyanellus complex, which includes three subspecies. We found a high variation in all the morphological characters of the aedeagus in the populations analysed; the morphometric variation was not geographically structured, either by population or by region. The genealogical analysis indicates a significant genetic structure that does not match either the morphological variation in the male genitalia or the previous subspecific taxonomic classification. Our results suggest that the morphological variation of the aedeagus is seemingly not an isolating reproductive barrier and that the intra- and interpopulation morphological variability of the aedeagus in the C. cyanellus complex does not permit the division into several species. We suggest that other evolutionary forces, such as genetic drift and sexual selection, have influenced the evolution of the male genitalia and the incipient differentiation of this species complex.

A new species of Cyrtodactylus Gray (Gekkonidae: Squamata) from Manus Island, and extended description and range extension for Cyrtodactylus sermowaiensis (De Rooij)

Zootaxa ◽  
2020 ◽  
Vol 4728 (3) ◽  
pp. 341-356
Author(s):  
PAUL M. OLIVER ◽  
RYAN HARTMAN ◽  
CAMERON D. TURNER ◽  
TAYLOR A. WILDE ◽  
CHRISTOPHER C. AUSTIN ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
New Species ◽  
Genetic Structure ◽  
Morphological Variation ◽  
Morphological Differentiation ◽  
Sedimentary Basins ◽  
New Guinea ◽  
Isolated Population ◽  
The North ◽  
A New Species

Systematic investigations of vertebrate faunas from the islands of Melanesia are revealing high levels of endemism, dynamic biogeographic histories, and in some cases surprisingly long evolutionary histories of insularity. The bent-toed geckos in the Cyrtodactylus sermowaiensis Group mainly occur in northern New Guinea and nearby islands, however a further isolated population occurs on Manus Island in the Admiralty Archipelago approximately 300 km to the north of New Guinea. Here we first present a review of the genetic diversity, morphological variation and distribution of Cyrtodactylus sermowaiensis from northern New Guinea. Genetic structure and distributional records within Cyrtodactylus sermowaiensis broadly overlap with underlying Terranes in northern New Guinea, suggesting divergence on former islands that have been obscured by the infill and uplift of sedimentary basins since the late Pleistocene. Based on a combination of genetic and morphological differentiation we then describe the population from Manus Island as a new species, Cyrtodactylus crustulus sp. nov. This new species emphasises the high biological endemism and conservation significance of the Admiralty Islands, and especially Manus Island. 

scholarly journals The biogeography of Elaphe sauromates (Pallas, 1814), with a description of a new rat snake species

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e6944 ◽  
Author(s):  
Daniel Jablonski ◽  
Oleg V. Kukushkin ◽  
Aziz Avcı ◽  
Sabina Bunyatova ◽  
Yusuf Kumlutaş ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Morphological Variation ◽  
Molecular Genetic ◽  
Glacial Refugia ◽  
Morphological Data ◽  
Meristic Characters ◽  
Climatic Oscillations ◽  
The Balkans ◽  
Haplotype Networks ◽  
Rat Snake

Background The rat snake genus Elaphe once comprised several dozens of species distributed in temperate through tropical zones of the New and Old World. Based on molecular-genetic analyses in early 2000s, the genus was split into several separate genera, leaving only 15 Palearctic and Oriental species as its members. One of the three species also occurring in Europe is Elaphe sauromates, a robust snake from the Balkans, Anatolia, Caucasus, Ponto-Caspian steppes, and Levant that has been suspected to be composed of two or more genetically diverse populations. Here, we studied the genetic structure and morphological variation of E. sauromates, aiming to better understand its inter-population relationships and biogeography, and subsequently revise its taxonomy. Methods We reconstructed the phylogeography and analyzed the genetic structure of E. sauromates populations originating from most of its geographic range using both mitochondrial (COI, ND4) and nuclear (C-MOS, MC1R, PRLR, RAG1) DNA gene fragments. We employed Maximum likelihood and Bayesian inference methods for the phylogenetic tree reconstructions, supplemented with species delimitation methods, analysis of haplotype networks, and calculation of uncorrected p-distances. Morphological variation in 15 metric and 18 meristic characters was studied using parametric univariate tests as well as multivariate general linearized models. In total, we analyzed sequences originating from 63 specimens and morphological data from 95 specimens of E. sauromates sensu lato. Results The molecular phylogeny identified two clearly divergent sister lineages within E. sauromates, with both forming a lineage sister to E. quatuorlineata. The genetic distance between them (5.80–8.24% in mtDNA) is similar to the distances among several other species of the genus Elaphe. Both lineages are also moderately morphologically differentiated and, while none of the characters are exclusively diagnostic, their combination can be used for confident lineage identification. Here, following the criteria of genetic and evolutionary species concepts, we describe the lineage from eastern Anatolia and parts of the Lesser and Great Caucasus as a new species E. urartica sp. nov. Discussion Elaphe urartica sp. nov. represents a cryptic species whose ancestors presumably diverged from their common ancestor with E. sauromates around the Miocene-Pliocene boundary. The intraspecific genetic structure indicates that the recent diversity of both species has been predominantly shaped by Pleistocene climatic oscillations, with glacial refugia mainly located in the Balkans, Crimea, and/or Anatolia in E. sauromates and Anatolia and/or the Caucasus in E. urartica sp. nov.

scholarly journals Genetic structure among sorghum landraces as revealed by morphological variation and microsatellite markers in three agroclimatic regions of Burkina Faso

2010 ◽  
Vol 120 (8) ◽  
pp. 1511-1523 ◽  
Author(s):  
Clarisse Barro-Kondombo ◽  
Fabrice Sagnard ◽  
Jacques Chantereau ◽  
Monique Deu ◽  
Kirsten vom Brocke ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Microsatellite Markers ◽  
Burkina Faso ◽  
Morphological Variation
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