scholarly journals DNA variation at the rp49 gene region in Drosophila madeirensis and D. subobscura from Madeira: inferences about the origin of an insular endemic species

2001 ◽  
Vol 14 (3) ◽  
pp. 379-387 ◽  
Author(s):  
M. Khadem ◽  
J. Rozas ◽  
C. Segarra ◽  
M. Aguade
Keyword(s):  
Endemic Species ◽  
Gene Region ◽  
Dna Variation ◽  
Insular Endemic ◽  
Insular Endemic Species ◽  
Rp49 Gene

A new insular, endemic frog of the genus Kalophrynus Tschudi, 1838 (Anura: Microhylidae) from Tioman Island, Pahang, Peninsular MalaysiaDepartment of Biology, La Sierra University, 4500 Riverwalk Parkway, Riverside, California, 92515-8247 USA.

Zootaxa ◽  
2011 ◽  
Vol 3123 (1) ◽  
pp. 60
Author(s):  
CHAN KIN ONN ◽  
L. LEE GRISMER ◽  
JESSE GRISMER
Keyword(s):  
Endemic Species ◽  
Peninsular Malaysia ◽  
Southeastern Coast ◽  
Insular Endemic ◽  
Insular Endemic Species

A new insular, endemic species of microhylid frog of the genus Kalophrynus is described from Tioman Island, off the southeastern coast of Pahang, Peninsular Malaysia. Kalophrynus tiomanensis sp nov. can be differentiated from its congeners by the following combination of characters: SVL 21.4–26.3 mm; reduced webbing on toes; outer metatarsal tubercle absent; large, black inguinal spot and unique markings on dorsum. This discovery increases the number of endemic species of amphibians on Tioman Island to at least three.

A colorful new species of insular rock gecko (Cnemaspis Strauch 1887) from southern Vietnam

Zootaxa ◽  
2010 ◽  
Vol 2352 (1) ◽  
pp. 46 ◽  
Author(s):  
L. LEE GRISMER ◽  
NGO VAN TRI ◽  
JESSE L. GRISMER
Keyword(s):  
New Species ◽  
Endemic Species ◽  
Age Classes ◽  
Southern Vietnam ◽  
The Third ◽  
Bright Orange ◽  
Hands And Feet ◽  
Insular Endemic ◽  
Insular Endemic Species ◽  
A New Species

A new species of endemic, insular Cnemaspis is described from Hon Khoai Island, Ca Mau Province, Ngoc Hien District, 18 km off the southern tip of the Ca Mu Peninsula in southern Vietnam. Cnemaspis psychedelica sp. nov. is the most uniquely colored of all southeast Asian Cnemaspis in that both sexes and all age classes have bright orange forelimbs, forelegs, hands and feet; a bright orange tail; a dense, yellow reticulum on the neck overlying thick, black, longitudinal lines; and a blue-gray to light purple trunk bearing yellow transverse bars on bright-orange flanks. It also differs from all other species of Cnemaspis in aspects of size and squamation. Cnemaspis psychedelica is the third insular endemic species of Cnemaspis from Vietnam and brings the total number of species in Vietnam to six. Its occurrence on one of the 92 islands in Rach Gia Bay underscores the necessity for continued surveys of these poorly known islands that are beginning to show a surprising degree of endemism and diversity.

scholarly journals Large-scale phylogenomics reveals ancient introgression in Asian Hepatica and new insights into the origin of the insular endemic Hepatica maxima

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Seongjun Park ◽  
SeonJoo Park
Keyword(s):  
Endemic Species ◽  
Evolutionary History ◽  
Large Scale ◽  
Oceanic Islands ◽  
Network Analyses ◽  
Organellar Genomes ◽  
History Of ◽  
Insular Endemic ◽  
Insular Endemic Species ◽  
Hybridization And Introgression

Abstract Hepatica maxima is native to Ulleungdo, which is one of the oceanic islands in Korea, and it likely originated via anagenetic speciation from the Korean mainland species H. asiatica. However, the relationships among the Asian lineages remain unresolved. Phylogenomics based on plant genomes can provide new insights into the evolutionary history of plants. We first generated plastid, mitochondrial and transcriptome sequences of the insular endemic species H. maxima. Using the genomic data for H. maxima, we obtained a phylogenomic dataset consisting of 76 plastid, 37 mitochondrial and 413 nuclear genes from Asian Hepatica and two outgroups. Coalescent- and concatenation-based methods revealed cytonuclear and organellar discordance in the lineage. The presence of gynodioecy with cytoplasmic male sterility in Asian Hepatica suggests that the discordance is correlated with potential disruption of linkage disequilibrium between the organellar genomes. Species network analyses revealed a deep history of hybridization and introgression in Asian Hepatica. We discovered that ancient and recent introgression events occurred throughout the evolutionary history of the insular endemic species H. maxima. The introgression may serve as an important source of genetic variation to facilitate adaptation to the Ulleungdo environment.

scholarly journals In “defense” of Podarcis latastei, an Italian insular endemic species (Squamata: Lacertidae)

2021 ◽  
pp. 1-5
Author(s):  
Riccardo Castiglia ◽  
Gabriele Senczuk ◽  
Wolfgang Böhme ◽  
Claudia Corti
Keyword(s):  
Endemic Species ◽  
Morphological Evidence ◽  
Taxonomic Change ◽  
Pontine Islands ◽  
Insular Endemic ◽  
Insular Endemic Species

Abstract Based on genetic and morphological evidence, Senczuk et al. (2019) formally raised the Podarcis populations from the Western Pontine Islands, previously classified as several subspecies of P. siculus, to species rank, i.e. Podarcis latastei (Bedriaga, 1879). This taxonomic change was not accepted in the checklist of the European herpetofauna by Speybroeck et al. (2020), recently published on Amphibia-Reptilia. In this note we respond to the reasons given by Speybroeck and colleagues and support the validity of Podarcis latastei as an endemic Italian species.

scholarly journals Plastid DNA variation of the endemic species Oxytropis glandulosa Turcz. (Fabaceae)

2018 ◽  
Vol 42 ◽  
pp. 38-50 ◽  
Author(s):  
Alla KHOLINA ◽  
Marina KOZYRENKO ◽  
Elena ARTYUKOVA ◽  
Denis SANDANOV ◽  
Inessa SELYUTINA ◽  
...  
Keyword(s):  
Endemic Species ◽  
Plastid Dna ◽  
Dna Variation

scholarly journals A new species of leaf-toed gecko (Phyllodactylidae, Phyllodactylus) from María Cleofas Island, Nayarit, Mexico

ZooKeys ◽  
2021 ◽  
Vol 1024 ◽  
pp. 117-136 ◽  
Author(s):  
Tonatiuh Ramírez-Reyes ◽  
Ilse K. Barraza-Soltero ◽  
Jose Rafael Nolasco-Luna ◽  
Oscar Flores-Villela ◽  
Armando H. Escobedo-Galván
Keyword(s):  
New Species ◽  
Biological Diversity ◽  
Morphological Evidence ◽  
Genetic Isolation ◽  
Unique Combination ◽  
Taxonomic Changes ◽  
Insular Endemic ◽  
Insular Endemic Species ◽  
A New Species ◽  
Insular Populations

We describe a new species of leaf-toed gecko of the genus Phyllodactylus from María Cleofas Island, the smallest island of Tres Marías Archipelago, Nayarit, México. Genomic, phylogenomic, and morphological evidence support that the new species presents a unique combination of diagnostic characters. Morphologically, the new species has a high number of tubercles, head to tail (mean 47), longitudinal ventral scales (mean 61), and third labial–snout scales (mean 26). Gene flow tests revealed the genetic isolation of insular populations from mainland counterparts. In addition, we confirmed the non-monophyly of P. homolepidurus and P. nolascoensis, and we show that the taxon P. t. saxatilis is a complex; therefore, we propose taxonomic changes within the saxatilis clade. The discovery of this new insular endemic species highlights the urgency of continued exploration of the biological diversity of island faunas of Mexico.

scholarly journals Molecular Population Genetics of the rp49 Gene Region in Different Chromosomal Inversions of Drosophila subobscura

Genetics ◽  
1999 ◽  
Vol 151 (1) ◽  
pp. 189-202 ◽  
Author(s):  
Julio Rozas ◽  
Carmen Segarra ◽  
Griselda Ribó ◽  
Montserrat Aguadé
Keyword(s):  
Drosophila Subobscura ◽  
Gene Region ◽  
Central Position ◽  
Nucleotide Variation ◽  
Nucleotide Polymorphism ◽  
Chromosomal Inversions ◽  
Molecular Population Genetics ◽  
Expansion Model ◽  
Time Of Origin ◽  
Rp49 Gene

Abstract Nucleotide variation at the ribosomal protein 49 (rp49) gene region has been studied in 75 lines of Drosophila subobscura belonging to four chromosomal arrangements (Ost, O3+4, O3+4+8, and O3+4+23). The location of the rp49 gene region within the inversion loop differs among heterokaryotypes: it is very close to one of the breakpoints in heterozygotes involving Ost chromosomes, while it is in a more central position in all other heterokaryotypes. The distribution of nucleotide polymorphism in the different arrangements is consistent with a monophyletic origin of the inversions. The data also provide evidence that gene conversion and possibly double crossover are involved in shuffling nucleotide variation among gene arrangements. The analyses reveal that the level of genetic exchange is higher when the region is located in a more central position of the inverted fragment than when it is close to the breakpoints. The pairwise difference distributions as well as the negative values of Tajima's and Fu and Li's statistics further support the hypothesis that nucleotide variation within chromosomal arrangements still reflects expansion after the origin of the inversions. Under the expansion model, we have estimated the time of origin of the studied inversions.

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