Multivariate Analysis of the Skull Size and Shape in Tube-Nosed Bats of the GenusMurina(Chiroptera: Vespertilionidae) from Vietnam

Mammal Study ◽  
2015 ◽  
Vol 40 (2) ◽  
pp. 79-94 ◽  
Author(s):  
Nguyen Truong Son ◽  
Masaharu Motokawa ◽  
Tatsuo Oshida ◽  
Vu Dinh Thong ◽  
Gabor Csorba ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Size And Shape ◽  
Skull Size

Comparative ecogeographical variation in skull size and shape of two species of woolly opossums (genus Caluromys)

2017 ◽  
Vol 267 ◽  
pp. 139-150 ◽  
Author(s):  
Luíza Zuchetto Magnus ◽  
Renata Figueira Machado ◽  
Nilton Cáceres
Keyword(s):  
Size And Shape ◽  
Skull Size

DNA content and chromosome evolution in the shrubby Oxalis

Genome ◽  
1988 ◽  
Vol 30 (1) ◽  
pp. 52-57 ◽  
Author(s):  
Daniel de Azkue ◽  
Arturo Martínez
Keyword(s):  
Multivariate Analysis ◽  
Dna Content ◽  
Numerical Taxonomy ◽  
Chromosome Evolution ◽  
Chromosome Size ◽  
Size And Shape

The amount of DNA varies widely in 20 shrubby Oxalis species analyzed, ranging from 1.76 pg in O. alstonii to 33.00 pg in O. dispar. This wide variation in DNA content coincided with a wide variation in chromosome size and shape. Numerical taxonomy methods showed that this variation in chromosome size and shape in shrubby Oxalis is mainly due to extra DNA. It was also possible to arrange the 20 species examined in six different groups on the basis of karyotypic similarities.Key words: Oxalis, DNA content, chromosome evolution, multivariate analysis.

Triangulation-Measurement Schemes in the Multivariate Analysis of Size and Shape

1989 ◽  
Vol 70 (3) ◽  
pp. 571-579 ◽  
Author(s):  
M. L. Zelditch ◽  
R. W. Debry ◽  
D. O. Straney
Keyword(s):  
Multivariate Analysis ◽  
Size And Shape

Cytotaxonomy of the Festuca spp. from Patagonia

1992 ◽  
Vol 70 (6) ◽  
pp. 1134-1140 ◽  
Author(s):  
Jorge Dubcovsky ◽  
Arturo J. Martínez
Keyword(s):  
Multivariate Analysis ◽  
Chromosome Number ◽  
Key Words ◽  
Distance Matrix ◽  
Chromosome Size ◽  
Size And Shape ◽  
Cytological Data ◽  
Vegetative Characters ◽  
First Time

Chromosome number and karyotypes of Festuca argentina (2n = 28), Festuca magellanica (2n = 42 and 2n = 56), and Festuca purpurascens (2n = 42) are described here for the first time, as well as new data on the karyotype of Festuca contracta (2n = 42). Multivariate analysis based on chromosome size and shape showed significant (p < 0.05) differences among these species but not among the populations of F. magellanica analyzed. The correlation between a distance matrix among all the Patagonian species based on nine karyotype parameters and one based on morphoreproductive characters was significant (r = 0.60, p < 0.01) but it was not significant when compared with vegetative characters (r = 0.25, p > 0.05). The morphoreproductive and cytological data supported the classification of the Patagonian species in four different subgenera reflecting that the Patagonian Festuca spp. had different phylogenetic origins. Key words: Festuca, karyotype, cytotaxonomy.

scholarly journals Rejection of the monotypic status of Peromyscus furvus (Rodentia: Cricetidae), with consequences for its species group

Therya ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 347-367
Author(s):  
Alejandro Cruz-Gómez ◽  
A. Alondra Castro Campillo ◽  
Zamira A. Ávila-Valle ◽  
Livia León-Paniagua ◽  
Marcia Ramírez-Sánchez ◽  
...  
Keyword(s):  
Phylogenetic Analyses ◽  
Mitochondrial Gene ◽  
Species Group ◽  
Probabilistic Methods ◽  
Valid Species ◽  
Single Type ◽  
Morphometric Characters ◽  
Size And Shape ◽  
Skull Size ◽  
Haplotype Networks

Previous studies using Cytochrome-b or ND3-ND4 mitochondrial gene have yielded intriguing evidence about the phylogenetic relationships among populations of Peromyscus furvus; however, those studies each based on phylogenies for a single type of genes, yielded conflicting topologies. In addition, analyses with traditional morphometrics have revealed differences in skull size among certain populations of the species. Therefore, in order to reassess the systematic and taxonomic status of P. furvus, we incorporated a suite of genetic and morphometric characters and employed cladistic analyses. Herein, we present results mostly derived from our genetic analyses (results from the phylogenetic examination of skull size and shape will appear later). Phylogenetic analyses were conducted using four mitochondrial genes (Cytb and ND3-ND4L-ND4) with the respective data analyzed separately or combined, followed by an analysis with genetic and morphometric data (size and shape characters). Most phylogenetic constructions were made with parsimonious methods, but probabilistic methods also were used in the analyses with the genes separated by type. Similar topologies were recovered from all analyses of the Cytb gene and from all parsimony analyses of the NADH genes; however, conflicting topologies were obtained with the probabilistic methods for the NADH genes. Additionally, to better understand the genetic variation in each type of gene, analyses for genetic divergence were conducted within and among genetic groups and haplotype networks were constructed. All the topologies obtained using genetic data questioned the monotypic status of P. furvus, as two additional clades were identified that seemingly correspond to unrecognized entities. The first of these, P. latirostris, occurs in the northern region and could be considered as either a species or subspecies. An unknown Peromyscus species nova that occurs to the south is considered as a valid species. Further, P. furvus s. s. becomes a polytypic species by recognizing at least two subspecies (P. f. angustirostris and P. f. furvus). Phylogenetic analyses also rejected membership of P. melanocarpus and P. ochraventer within the furvus species group. Instead, P. melanocarpus showed a greater affinity to P. mexicanus totontepecus, whereas, P. ochraventer either joined to the clade containing P. melanocarpus and P. m. tototepecus or to Megadontomys cryophilus in a sister clade. Finally, Osgoodomys banderanus (subgenus Haplomylomys) always remained basally positioned and segregated from all members of the subgenus Peromyscus.

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