scholarly journals Phylogeographic study of the Bufo gargarizans species complex, with emphasis on Northeast Asia

2021 ◽  
pp. 1-11
Author(s):  
Changhoon Lee ◽  
Jonathan J. Fong ◽  
Jian-Ping Jiang ◽  
Pi-Peng Li ◽  
Bruce Waldman ◽  
...  
Keyword(s):  
Species Complex ◽  
Northeast Asia ◽  
Bufo Gargarizans ◽  
Phylogeographic Study

Phylogeographic analysis of the Bufo gargarizans species complex: A revisit

2005 ◽  
Vol 37 (1) ◽  
pp. 202-213 ◽  
Author(s):  
Jinzhong Fu ◽  
Cameron J. Weadick ◽  
Xiaomao Zeng ◽  
Yuezhao Wang ◽  
Zhijun Liu ◽  
...  
Keyword(s):  
Species Complex ◽  
Phylogeographic Analysis ◽  
Bufo Gargarizans

First distribution record of the Asiatic Toad Bufo gargarizans Cantor, 1842 from India — Dibang Valley in Arunachal Pradesh

2021 ◽  
Vol 13 (5) ◽  
pp. 18319-18323
Author(s):  
Sahil Nijhawan ◽  
Jayanta Kumar Roy ◽  
Iho Mitapo ◽  
Gata Miwu ◽  
Jibi Pulu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Species Complex ◽  
Morphological Characteristics ◽  
Wide Distribution ◽  
Western China ◽  
The Tibetan Plateau ◽  
Arunachal Pradesh ◽  
Bufo Gargarizans ◽  
Toad Bufo ◽  
Distribution Record

Bufo gargarizans, a species complex, has a wide distribution ranging from Japan to south-western China, Vietnam, and Russia but was not previously reported from India.  Surveys conducted in Dibang Valley district of Arunachal Pradesh near the Indo-Tibetan border with China in 2014–15 revealed previously unreported specimens of the toad genus Bufo.  Based on photographic comparisons with morphological characteristics obtained from published literature, we have identified the Bufo from Dibang Valley as the Asiatic Toad Bufo gargarizans Cantor, 1842.  Individuals of the species reported from Dibang have a wide mid dorsal line in the dorsum, rarely observed in Bufo gargarizans except in the sub-populations on the Tibetan Plateau.

Molecular systematics of the Pardosa groenlandica species complex (Araneae: Lycosidae): large sample sizes fail to find monophyletic species

2015 ◽  
Vol 147 (6) ◽  
pp. 643-664
Author(s):  
Jozef Slowik ◽  
Derek S. Sikes
Keyword(s):  
Mitochondrial Dna ◽  
Dna Barcoding ◽  
Molecular Systematics ◽  
Species Complex ◽  
Mitochondrial Gene ◽  
Species Boundaries ◽  
Bayesian Analyses ◽  
Gene Coi ◽  
Competing Hypotheses ◽  
Phylogeographic Study

AbstractRelationships within the Pardosa groenlandica species complex (sensu Slowik and Sikes 2013) were analysed to test two competing hypotheses – the species complex consists of either four or seven species. We conducted a partitioned Bayesian analyses of the mitochondrial gene COI and the nuclear genes ITS1, 5.8S, and ITS2. These genes provided a dataset composed of 1874 nucleotides each from 144 specimens. Additional analyses included application of the DNA barcoding protocol and a phylogeographic study of a subset of specimens. Analyses found no support for either hypothesis and only one species was found monophyletic in a subset of analyses. Mitochondrial DNA yielded clades discordant with geography. Species in the P. groenlandica species complex show various amounts of genetic support, with a general lack of agreement between genetics and morphology for species boundaries.

scholarly journals Phylogeographic study of the Bufo gargarizans species complex, with emphasis on Northeast Asia

2020 ◽  
Author(s):  
Chang-hoon Lee ◽  
Jonathan FONG ◽  
Jian-Ping Jiang ◽  
Pi-Peng Li ◽  
Bruce Waldman ◽  
...  
Keyword(s):  
Korean Peninsula ◽  
Population Genetic ◽  
Phylogenetic Trees ◽  
Northeast Asia ◽  
Geographic Region ◽  
Glacial Refugium ◽  
Population Genetic Study ◽  
Glacial Cycles ◽  
Bufo Gargarizans ◽  
China Mainland

We conduct a phylogeographic and population genetic study of the Asiatic Toad (Bufo gargarizans) to understand its evolutionary history, and the influence of geology and climate of the region. A total of 292 individuals from 94 locations were genotyped for two mitochondrial DNA loci (cytb, ND2 gene) and five nuclear introns (Sox9-2, Rho-3, CCNB2-3, UCH-2, DBI-2). We performed a suite of phylogenetic, population genetic, and divergence dating analyses. The phylogenetic trees constructed using mitochondrial loci inferred B. gargarizans being divided into two major groups: West (China mainland) and Northeast (Northeast China, Russia and Korean Peninsula). As with previous studies of this species, we recover population genetic structure not tied to geographic region. Additionally, we discover a new genetic clade restricted to Northeast Asia that points towards the Korean Peninsula being a glacial refugium during the Pleistocene. The weak phylogeographic pattern of B. gargarizans is likely the result of multiple biological, anthropogenic, and historical—robust dispersal abilities as a consequence of physiological adaptations, human translocation, geologic activity, and glacial cycles of the Pleistocene. We highlight the complex geologic and climatic history of Northeast Asia and encourage further research to understand its impact on the biodiversity in the region.

scholarly journals Phylogeographic study reveals the origin and evolutionary history of a Rhododendron species complex in Taiwan

2007 ◽  
Vol 42 (1) ◽  
pp. 14-24 ◽  
Author(s):  
Jeng-Der Chung ◽  
Tsan-Piao Lin ◽  
Yu-Ling Chen ◽  
Yu-Pin Cheng ◽  
Shih-Ying Hwang
Keyword(s):  
Species Complex ◽  
Evolutionary History ◽  
History Of ◽  
Phylogeographic Study

Identification of sibling species in the genus Eucyclops from water-bodies of Ukraine and Russia using crossbreeding studies

2014 ◽  
Vol 25 (1-2) ◽  
pp. 61-68 ◽  
Author(s):  
V. I. Monchenko ◽  
L. P. Gaponova ◽  
V. R. Alekseev
Keyword(s):  
Cryptic Species ◽  
River Basin ◽  
Black Sea ◽  
Species Complex ◽  
River Basins ◽  
Water Bodies ◽  
Similar Species ◽  
Basin Water ◽  
Different Populations ◽  
Baltic Sea Basin

Crossbreeding experiments were used to estimate cryptic species in water bodies of Ukraine and Russia because the most useful criterion in species independence is reproductive isolation. The problem of cryptic species in the genus Eucyclops was examined using interpopulation crosses of populations collected from Baltic Sea basin (pond of Strelka river basin) and Black Sea basin (water-reservoires of Dnieper, Dniester and Danube rivers basins). The results of reciprocal crosses in Eucyclops serrulatus-group are shown that E. serrulatus from different populations but from water bodies belonging to the same river basin crossed each others successfully. The interpopulation crosses of E. serrulatus populations collected from different river basins (Dnipro, Danube and Dniester river basins) were sterile. In this group of experiments we assigned evidence of sterility to four categories: 1) incomplete copulation or absence of copulation; 2) nonviable eggs; 3) absence of egg membranes or egg sacs 4) empty egg membranes. These crossbreeding studies suggest the presence of cryptic species in the E. serrulatus inhabiting ecologically different populations in many parts of its range. The same crossbreeding experiments were carries out between Eucyclops serrulatus and morphological similar species – Eucyclops macruroides from Baltic and Black Sea basins. The reciprocal crossings between these two species were sterile. Thus taxonomic heterogeneity among species of genus Eucyclops lower in E. macruroides than in E. serrulatus. The interpopulation crosses of E. macruroides populations collected from distant part of range were fertile. These crossbreeding studies suggest that E. macruroides species complex was evaluated as more stable than E. serrulatus species complex.

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