A description of two new species of Ligophorus Euzet & Suriano, (Monogenea: Ancyrocephalidae) from Malaysian mugilid fish using principal component analysis and numerical taxonomy

2013 ◽  
Vol 89 (2) ◽  
pp. 131-149 ◽  
Author(s):  
O.Y.M. Soo ◽  
L.H.S. Lim
Keyword(s):  
Principal Component Analysis ◽  
New Species ◽  
Numerical Taxonomy ◽  
Principal Component ◽  
Component Analysis ◽  
Copulatory Organ ◽  
Ventral Anchor ◽  
Initial Part ◽  
Two New Species ◽  
Shape And Size

AbstractLigophorus belanaki n. sp. and Ligophorus kederai n. sp. are described from Liza subviridis Valenciennes, 1836 and Valamugil buchanani Bleeker, 1854, respectively. Ligophorus kederai n. sp. has fenestrated ventral anchors, while in L. belanaki n. sp. the ventral anchor is not fenestrated. Ligophorus belanaki n. sp. is similar to L. careyensis, one of its coexisting congeners, in the overall shape and size of hard parts, but differs in having a flat median piece in the structure of the AMP (antero-median protuberance of the ventral bar), copulatory organ with non-ornamented initial part and longer vaginal tube, compared to raised median piece in the AMP, ornamented initial part and comparatively shorter vaginal tube in L. careyensis. Ligophorus kederai n. sp. is similar to L. fenestrum, a coexisting congener, in having fenestrated ventral anchors, but differs in having longer points and narrower base. Ligophorus fenestrum, unlike L. kederai n. sp., also possesses fenestrated dorsal anchors. The principal component analysis (PCA) scatterplots indicate that the two new and eight known Ligophorus species from Malaysian mugilids can be differentiated based on the morphometries of their anchors, ventral bars and copulatory organ separately and when combined together. Numerical taxonomy (NT) analyses based on Jaccard's Index of Similarity and neighbour-joining clustering, is used to facilitate comparison of these two new species with the 50 known Ligophorus based on morphological and metric characters. The two new species are different from each other and the other 50 species in the overall shapes and sizes of hard parts, as indicated by the NT analyses.

Implications of phenotypic plasticity for numerical taxonomy of Ornithogalum montanum (Liliaceae)

1991 ◽  
Vol 69 (1) ◽  
pp. 34-38 ◽  
Author(s):  
M. Pigliucci ◽  
M. G. Politi ◽  
D. Bellincampi
Keyword(s):  
Principal Component Analysis ◽  
Phenotypic Plasticity ◽  
Numerical Taxonomy ◽  
Natural Populations ◽  
Principal Component ◽  
Reaction Norm ◽  
Component Analysis ◽  
Morphological Response ◽  
Numerical Taxonomic Study ◽  
High Degree

Implications of phenotypic plasticity in a subspecific numerical taxonomic study of Ornithogalum montanum Cyr. (Liliaceae) are discussed. Clones belonging to six natural populations were grown in a glasshouse, and their morphological response to three water dosages was analyzed by means of principal component analysis. PC-1 ranks the three groups of replicated populations, suggesting a high degree of phenotypic plasticity; on the other hand, PC-3 is almost environmentally independent. Proximities in the phenetic space are shown to be at least partially environmentally dependent, suggesting a reaction norm for the character correlation matrix. The results do not corroborate a previous recognition of six subspecies of O. montanum. Key words: phenotypic plasticity, numerical taxonomy, Ornithogalum, reaction norm, principal component analysis.

Taxonomic revision of the Colombian Tityus (Archaeotityus) (Scorpiones, Buthidae) species: a morphological and morphometric approach, with a description of a new species

Zootaxa ◽  
2019 ◽  
Vol 4660 (1) ◽  
pp. 1-94
Author(s):  
JAIRO A. MORENO-GONZÁLEZ ◽  
RANULFO GONZÁLEZ O. ◽  
EDUARDO FLÓREZ D.
Keyword(s):  
Principal Component Analysis ◽  
New Species ◽  
New Records ◽  
Principal Component ◽  
Taxonomic Revision ◽  
Component Analysis ◽  
Morphological Characters ◽  
Species Level ◽  
Qualitative And Quantitative ◽  
A New Species

We present a taxonomic revision of the Colombian Tityus (Archaeotityus) species based on morphological and morphometric evidence. We examined more than 385 specimens and evaluated new and previously used qualitative and quantitative morphological characters. We redescribe the Colombian species and present morphological characters for both sexes and an emended diagnosis for the subgenus Tityus (Archaeotityus). We describe a new species Tityus guane sp. nov. from Santander department, Colombia, Tityus betschi Lourenço 1992 is synonymized with Tityus parvulus Kraepelin, 1914, and Tityus wayuu Rojas-Runjaic & Armas, 2007 is synonymized with Tityus tayrona Lourenço, 1991. We measured 186 specimens and performed a multivariate principal component analysis (PCA) for 34 selected morphometric ratios for each sex. We found that a few morphological ratios support species level distinctions within the Colombian species. We provide updated distributional maps with new records and an identification key for both sexes. Furthermore, we provide an updated checklist for the subgenus and a discussion about the character systems used within Tityus (Archaeotityus). The new morphological characters proposed and the traditional morphometry examined with a PCA are useful for studying Tityus (Archaeotityus) taxonomy.

scholarly journals Rhamnella brachycarpa (Rhamnaceae), a new species from Hainan Island, China

PhytoKeys ◽  
2019 ◽  
Vol 132 ◽  
pp. 19-29
Author(s):  
Zhiqiang Lu ◽  
Yongshuai Sun
Keyword(s):  
Principal Component Analysis ◽  
New Species ◽  
Principal Component ◽  
Woody Species ◽  
Hainan Island ◽  
Component Analysis ◽  
Morphological Characters ◽  
The Other ◽  
A New Species

Rhamnella brachycarpa Z. Qiang Lu & Y. Shuai Sun, a new evergreen woody species from Hainan Island, is described and illustrated. The specimens of this new species have previously been identified and placed under R. rubrinervis (H. Lév.) Rehder, with which it shares evergreen leaves, erect and climbing habits and axillary flowering branches with bracteole leaves. However, the specimens from three distinct Hainan populations significantly differ from those of R. rubrinervis from other regions with smaller length to width ratios of leaves, fruit and seeds, smaller sizes of fruit and seeds and mucronate seed apices. Principal Component Analysis of the closely related taxa, based on multiple morphological characters, further recognised two separated groups. One of them comprises R. tonkinensis and R. rubrinervis, the other merely includes all individuals from these distinct Hainan populations. Therefore, R. brachycarpa, based on these distinct Hainan populations, is here erected as a new species, distinctly different from its published relatives.

Limonium tobarrense (Plumbaginaceae), a new species from the southeastern Iberian Peninsula

Phytotaxa ◽  
2016 ◽  
Vol 257 (1) ◽  
pp. 61 ◽  
Author(s):  
JOAQUÍN MORENO ◽  
ALEJANDRO TERRONES ◽  
MARÍA ÁNGELES ALONSO ◽  
ANA JUAN ◽  
MANUEL B. CRESPO
Keyword(s):  
Principal Component Analysis ◽  
Multivariate Analysis ◽  
New Species ◽  
Iberian Peninsula ◽  
Conservation Status ◽  
Principal Component ◽  
Component Analysis ◽  
Diagnostic Key ◽  
A New Species

A new species, Limonium tobarrense (Plumbaginaceae), is described from the inland saltmarsh of Cordovilla (Tobarra) in Albacete province, southeastern Iberian Peninsula. This new species is morphologically close to the taxa belonging to the Limonium girardianum group, but there are remarkable differences suggesting separation at species rank. Comparisons are provided with L. dufourii, L. girardianum and L. grosii using multivariate analysis. The principal component analysis (PCA) shows four separated groups, each corresponding to the four species considered. Ecological, phytosociological, bioclimatic, biogeographic and reproductive features of the new species are also discussed, as well as its conservation status. A diagnostic key is provided to facilitate identification of L. tobarrense and its closer allies.

A new species of Ormosia (Leguminosae, Papilionoideae, Sophoreae) from the Brazilian Atlantic Rain Forest

Phytotaxa ◽  
2013 ◽  
Vol 143 (1) ◽  
pp. 54
Author(s):  
Jose Eduardo Meireles ◽  
Haroldo Cavalcante De Lima
Keyword(s):  
Principal Component Analysis ◽  
New Species ◽  
Rain Forest ◽  
Principal Component ◽  
Component Analysis ◽  
Atlantic Rain Forest ◽  
Legume Species ◽  
Morphometric Data ◽  
Abaxial Surface ◽  
A New Species

A new legume species from the Brazilian Atlantic Rain Forest, Ormosia altimontana, is described and illustrated. The new species belongs to the section Ormosia, series Excelsae, and shows morphological affinities with O. friburgensis and O. ruddiana, from which it is distinguished by having fewer leaflets (5-7) with prominent secondary veins, a tomentose abaxial surface, and longer pulvinules, and slightly longer flowers. A Principal Component Analysis of vegetative morphometric data supports O. altimontana as morphologically distinct from O. friburgensis and O. ruddiana.

Eutrema bulbiferum (Brassicaceae), a new species with bulbils from Hunan, China

Phytotaxa ◽  
2015 ◽  
Vol 219 (3) ◽  
pp. 233 ◽  
Author(s):  
Yan Xiao ◽  
Chun Li ◽  
Tung-Yu Hsieh ◽  
Dai-Ke Tian ◽  
Jian-Jun Zhou ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Phylogenetic Analysis ◽  
New Species ◽  
Internal Transcribed Spacer ◽  
Principal Component ◽  
Component Analysis ◽  
Leaf Axil ◽  
Morphometric Characters ◽  
Stem Base ◽  
A New Species

Eutrema bulbiferum, a unique new species of Brassicaceae found in the limestone areas of Longshan and Jishou, Hunan, China, is described and illustrated. This species is most similar to E. tenue and E. yunnanense, but can be easily distinguished by its rosulate fleshy bulbils in the leaf axil or near the stem base, fewer ovules per ovary, slightly 4-angled short wand-like silique, and bended silique apex with a beak. E. bulbiferum is categorized into Eutrema by phylogenetic analysis based on the nuclear internal transcribed spacer (ITS). It is also clearly separated from E. tenue and E. yunnanense by the results of both phylogenetic analysis and Principal Component Analysis (PCA) based on morphometric characters.

scholarly journals Two New Himalayan Ant Species (Hymenoptera, Formicidae) Related to Myrmica indica

2009 ◽  
Vol 43 (2) ◽  
pp. e-9-e-21 ◽  
Author(s):  
G. Elmes ◽  
A. Radchenko
Keyword(s):  
Principal Component Analysis ◽  
New Species ◽  
Discriminant Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Close Relative ◽  
The Himalaya

Two New Himalayan Ant Species (Hymenoptera, Formicidae) Related to Myrmica indica Myrmica weberi Elmes et Radchenko, sp. n. and M. alperti Elmes et Radchenko, sp. n. from the Himalaya are described. Morphometric comparisons of the new species and their close relative M. indica Weber, 1950 were made using Principal Component Analysis and Discriminant Analysis.

A German version of the Intermittent Claudication Questionnaire (ICQ): cultural adaptation and validation

VASA ◽  
2012 ◽  
Vol 41 (5) ◽  
pp. 333-342 ◽  
Author(s):  
Kirchberger ◽  
Finger ◽  
Müller-Bühl
Keyword(s):  
Principal Component Analysis ◽  
Intermittent Claudication ◽  
Completion Time ◽  
Short Form ◽  
Principal Component ◽  
Component Analysis ◽  
German Version ◽  
Average Completion Time ◽  
Sf 36 ◽  
Related Quality

Background: The Intermittent Claudication Questionnaire (ICQ) is a short questionnaire for the assessment of health-related quality of life (HRQOL) in patients with intermittent claudication (IC). The objective of this study was to translate the ICQ into German and to investigate the psychometric properties of the German ICQ version in patients with IC. Patients and methods: The original English version was translated using a forward-backward method. The resulting German version was reviewed by the author of the original version and an experienced clinician. Finally, it was tested for clarity with 5 German patients with IC. A sample of 81 patients were administered the German ICQ. The sample consisted of 58.0 % male patients with a median age of 71 years and a median IC duration of 36 months. Test of feasibility included completeness of questionnaires, completion time, and ratings of clarity, length and relevance. Reliability was assessed through a retest in 13 patients at 14 days, and analysis of Cronbach’s alpha for internal consistency. Construct validity was investigated using principal component analysis. Concurrent validity was assessed by correlating the ICQ scores with the Short Form 36 Health Survey (SF-36) as well as clinical measures. Results: The ICQ was completely filled in by 73 subjects (90.1 %) with an average completion time of 6.3 minutes. Cronbach’s alpha coefficient reached 0.75. Intra-class correlation for test-retest reliability was r = 0.88. Principal component analysis resulted in a 3 factor solution. The first factor explained 51.5 of the total variation and all items had loadings of at least 0.65 on it. The ICQ was significantly associated with the SF-36 and treadmill-walking distances whereas no association was found for resting ABPI. Conclusions: The German version of the ICQ demonstrated good feasibility, satisfactory reliability and good validity. Responsiveness should be investigated in further validation studies.

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