Genetic divergence and phylogeographic history of two closely related species (Leucomeris decora and Nouelia insignis) across the 'Tanaka Line' in Southwest China

Groups of recently diverged species offer invaluable glimpses into the history and genetic basis of speciation and phenotypic evolution. In this report, we combine phylogenetic and population-genetic approaches to reconstruct the evolutionary history of the Drosophila bipectinata species complex. This complex is a group of four closely related, largely sympatric species – D. bipectinata, D. parabipectinata, D. malerkotliana and D. pseudoananassae. Using the sequences of one mitochondrial and six nuclear loci, we show that D. bipectinata and D. parabipectinata are the two most closely related species, and that together with D. malerkotliana they form a monophyletic clade to which D. pseudoananassae is a relatively distant outgroup. Genetic divergence among D. bipectinata, D. parabipectinata and D. malerkotliana is extremely low, and we estimate that these species diverged only 283000–385000 years ago. We also find that mitochondrial DNA shows evidence of recent gene flow across species boundaries. Despite the low genetic divergence, species of the bipectinata complex show an unusually high degree of morphological differentiation. This contrast underscores the importance of understanding the genetic basis of functional differentiation among closely related species.

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A comparative study of the life histories of Nematodirus battus and N. filicollis, nematode parasites of sheep

Parasitology ◽

10.1017/s0031182000026925 ◽

1959 ◽

Vol 49 (3-4) ◽

pp. 374-386 ◽

Cited By ~ 43

Author(s):

R. J. Thomas

Keyword(s):

Life History ◽

Intestinal Mucosa ◽

Related Species ◽

Life Histories ◽

Basic Pattern ◽

Culture Methods ◽

Closely Related Species ◽

Nematode Parasites ◽

History Of ◽

Comparative Description

1. The life history of N. battus is described, and a comparative description of the life history of N. filicollis is given.2. The life histories of these two species are compared with those of N. spathiger and N. helvetianus, two closely related species, and are shown to follow the same basic pattern, with minor variations in timing which appear to be specific in nature, and not related to differences in culture methods or host species.3. The pathogenesis of Nematodirus species is discussed and related to the migration of larvae into the intestinal mucosa during development.

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Molecular markers reconstruct the invasion history of variable leaf watermilfoil (Myriophyllum heterophyllum) and distinguish it from closely related species

Biological Invasions ◽

10.1007/s10530-010-9927-0 ◽

2011 ◽

Vol 13 (7) ◽

pp. 1687-1709 ◽

Cited By ~ 16

Author(s):

Ryan A. Thum ◽

Matthew P. Zuellig ◽

Robert L. Johnson ◽

Michael L. Moody ◽

Charles Vossbrinck

Keyword(s):

Molecular Markers ◽

Related Species ◽

Invasion History ◽

Closely Related Species ◽

History Of

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New species of the genus Epiphragma Osten Sacken from Yunnan, Southwest China (Diptera, Limoniidae)

Zootaxa ◽

10.11646/zootaxa.2121.1.5 ◽

2009 ◽

Vol 2121 (1) ◽

pp. 44-56 ◽

Cited By ~ 3

Author(s):

MENG MAO ◽

DING YANG

Keyword(s):

New Species ◽

Related Species ◽

Southwest China ◽

Closely Related Species ◽

First Time

The subgenus Epiphragma (Epiphragma) Osten Sacken, 1860 is recorded from Yunnan (Southwest China) for the first time. The following five species with two dark rings on the femora are described as new to science: E. mediale sp. nov., E. yunnanense sp. nov., E. ancistrum sp. nov., E. breve sp. nov. and E. elongatum sp. nov. Their relationships with closely related species are discussed. A key to the species of the subgenus Epiphragma from China is presented for the first time.

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Discordant patterns of morphological and genetic divergence in the closely related species Schizanthus hookeri and S. grahamii (Solanaceae)

Plant Systematics and Evolution ◽

10.1007/s00606-011-0433-3 ◽

2011 ◽

Vol 293 (1-4) ◽

pp. 197-205 ◽

Cited By ~ 10

Author(s):

Fernanda Pérez

Keyword(s):

Related Species ◽

Genetic Divergence ◽

Closely Related Species

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Evolutionary Patterns in the Genus Homo

International Journal of Human Genetics ◽

10.31901/24566330.2021/21.01.771 ◽

2021 ◽

Vol 21 (01) ◽

Author(s):

Nisar A. Shar

Keyword(s):

Related Species ◽

Homo Sapiens ◽

Demographic History ◽

Human Intelligence ◽

Evolutionary Patterns ◽

Closely Related Species ◽

Genus Homo ◽

Wide Range ◽

History Of

ABSTRACT The demographic history of Homo sapiens is complex; it involves a wide range of migrations and genetic adaptations. One of the closely related species to Homo sapiens is Neanderthals, which became extinct about 30,000 years ago. The aim of this research is to compare Homo sapiens with Neanderthals and chimpanzees to understand the patterns of inheritance and survival instincts of Homo sapiens. Results show that out of all selected groups of genes in this study, metabolism, and language genes are found to be the most evolving group of genes. This shows that these most evolving genes are contributing to the advancement of Homo sapiens. However, after comparing human intelligence genes with the primates, it is found that exonic regions are contributing more to the evolution of human intelligence hence, making Homo sapiens unique in terms of intelligence.

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New records of two Lutjanus species (Teleostei: Perciformes: Lutjanidae) with re-description of six lutjanids from Saint Martin’s Island of the Bay of Bengal, Bangladesh

Bangladesh Journal of Zoology ◽

10.3329/bjz.v46i2.39056 ◽

2018 ◽

Vol 46 (2) ◽

pp. 239-253 ◽

Cited By ~ 1

Author(s):

Shilpi Saha ◽

Sanjay Chakraborty ◽

Subrina Sehrin ◽

Abdullah Al Masud ◽

Kazi Ahsan Habib ◽

...

Keyword(s):

Phylogenetic Analysis ◽

Bay Of Bengal ◽

Related Species ◽

Genetic Divergence ◽

New Records ◽

Morphological Differentiation ◽

Morphological Characters ◽

Mitochondrial Cytochrome ◽

Closely Related Species ◽

Mitochondrial Cytochrome Oxidase

Investigations on Snapper fish of the genus Lutjanus were conducted from October 2015 to April 2016 in the coral ecosystem of St. Martin’s Island, Bangladesh. Twenty one individuals of 8 species of Lutjanus were collected from local fishermen. Both morphological characters and DNA barcoding approach by mitochondrial cytochrome oxidase I subunit (COI) were used to confirm the identification of all species. Present study recorded the first national occurrence of two reef associated Lutjanus species (L. xanthopinnis and L. indicus). In addition six species (L. rivulatus, L. lutjanus, L. vitta, L. lemniscatus, L. fulviflamma and L. johnii) were re-described. Distinct morphological differentiation were found between more closely related species L. xanthopinnis, L. vitta and L. lutjanus. Three different appearances of L. johnii, two different appearances of L. rivulatus and L. lemniscatus were confirmed as same species. Phylogenetic analysis showed monophylotic clade for conspecific individuals and paraphyletic clade for congeneric individuals. Average genetic divergence for intraspecific level was 1.5% and 12.5% for interspecific level. Current study increased the number of Lutjanus species in Bangladesh from 15 to 17 and extended the distribution range of those new recorded species in northeastern part of the Bay of Bengal. Bangladesh J. Zool. 46(2): 239-253, 2018

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Eversion and withdrawal of an intromittent organ before sexual maturation prepares male beetles for copulation

Royal Society Open Science ◽

10.1098/rsos.161029 ◽

2017 ◽

Vol 4 (8) ◽

pp. 161029 ◽

Cited By ~ 1

Author(s):

Yoko Matsumura ◽

Takuya Kubo

Keyword(s):

Phylogenetic Tree ◽

Sexual Maturation ◽

Related Species ◽

Evolutionary History ◽

Active State ◽

Surface Structures ◽

Closely Related Species ◽

Spermathecal Duct ◽

History Of ◽

Coiled State

Some species of criocerine beetles have a hyper-elongated part of the intromittent organ called a flagellum. In resting position, the flagellum is stored in a specialized internal sac in the intromittent organ. This specialized state of the flagellum and internal sac is indispensable during copulation for flagellar insertion into the female spermathecal duct for sperm transfer. However, the morphogenesis of the flagellum does not generate the active state of the flagellum; rather, the flagellum is generated in an inactive and completely coiled state. After eclosion, males of Lema coronata evert and withdraw the internal sac multiple times before sexual maturation, without mounting a female. This behaviour serves to uncoil the flagellum and guide it into the active state with the aid of surface structures on the internal sac. A closely related species, Lema dilecta , also has a long flagellum and undergoes the same behaviour to place the flagellum in the active position. However, some other species of criocerine beetles with much shorter flagella can attain the active state without exhibiting this behaviour. Based on a previously proposed phylogenetic tree, we discuss the evolutionary history of the hyper-elongation of the flagellum and associated behaviour.

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On Mannia androgyna (Aytoniaceae, Marchantiophyta) in Eastern Asia

Polish Botanical Journal ◽

10.2478/pbj-2014-0037 ◽

2014 ◽

Vol 59 (2) ◽

pp. 221-228 ◽

Cited By ~ 3

Author(s):

Eugene A. Borovichev ◽

Vadim A. Bakalin ◽

Masanobu Higuchi

Keyword(s):

Related Species ◽

Distribution Patterns ◽

Mediterranean Species ◽

Eastern Asia ◽

Closely Related Species ◽

History Of

Abstract The discovery of Mannia androgyna (L.) A. Evans in Russian Asian and Japanese localities changes the conception of the distribution patterns of the taxon, previously regarded as principally a Mediterranean species. A description and illustrations based on specimens collected in Russian Asia and Japan are provided. The history of the taxonomic understanding of Mannia androgyna is briefly reviewed, and features differentiating closely related species are discussed.

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Neglected Quaternary legacy on biodiversity in the Mountains of Southwest China

10.1101/2020.02.28.969089 ◽

2020 ◽

Author(s):

Tao Wan ◽

Huateng Huang ◽

Jamie R. Oaks ◽

Xuelong Jiang ◽

L. Lacey Knowles

Keyword(s):

Complex Terrain ◽

Climate Changes ◽

Southwest China ◽

Biodiversity Hotspot ◽

Vertebrate Species ◽

Glacial Cycles ◽

Temporal Synchrony ◽

Relative Independence ◽

Phylogeographic History ◽

History Of

AbstractMountains of Southwest China (MSWC) is a biodiversity hotspot with a very unique and highly complex terrain. However, with the majority of studies focusing on the biogeographic consequences of massive mountain building, the Quaternary legacy of biodiversity for the MSWC has long been overlooked. Here, we took a comparative phylogeography approach to examine factors that shaped community-wide diversification. With data from 30 vertebrate species, the results reveal spatially concordant genetic structure, with temporally clustered divergence events during severe glacial cycles, indicating the importance of riverine barriers in the phylogeographic history of the vertebrate community. We conclude that the repeated glacial cycles are associated with temporal synchrony of divergence patterns that are themselves structured by the heterogeneity of the montane landscape has of the MSWC. This orderly process of diversifications has profound implications for conservation by highlighting the relative independence of different geographic areas in which communities have responded similarly to climate changes and calls for further comparative phylogeographic investigations to reveal the extent to which these findings might apply more broadly to other taxa in this biodiversity hotspot.

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