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Morphometrics of Leptoplastides marianus (Hoek) (Trilobita, Olenidae) from the Tremadocian of north-western Argentina: taxonomic implications
(Cambridge University Press, 2018-02)
Morphometrics can be an important tool in systematic studies, providing taxonomists with strong elements of quantification and formal hypothesis testing. Here, these tools are tested for the trilobite Leptoplastides marianus ...
Geometric morphometrics in ammonoids based on virtual modelling
(Coquina Press, 2021-09)
Linear morphometrics is the most widely applied technique to study the variationof the conch morphology in ammonoids and other ectocochleate cephalopods. However,because this method frequently relies upon a few linear ...
Sexual dimorphism in a freshwater atyid shrimp (Decapoda: Caridea) with direct development: A geometric morphometrics approach
(Magnolia Press, 2016-11)
Neocaridina davidi is a caridean shrimp that has gained popularity in recent years as an ornamental species. Using geometric morphometrics, we investigated sexual dimorphism in carapace and second abdominal segment shape ...
Geometric morphometrics for the differentiation of females of the Pipiens Assemblage in Argentina
(Wiley, 2020-06)
Complexes or assemblages of culicid species and subspecies from the southern region of Latin America are difficult to differentiate morphologically (Harbach 2012, Laurito et al. 2017). These complexes include taxa with ...
Describing the children's body shape by means of Geometric Morphometric techniques
(Wiley-liss, Div John Wiley & Sons Inc, 2019-04)
Introduction: Large shape variations take place during the growth process of children, including quantitative mass and size increase plus qualitative changes in their body shape. The aim of the present study is to apply ...
Size and shape analysis of gunflints from the British shipwreck Deltebre I (1813), Catalonia, Spain: a geometric morphometric comparison of unused and used artefacts
(Springer, 2019-09)
Gunflints represent a worldwide feature of lithic technology in modern times. This type of artefact was used to ignite the powder of firearms through a flintlock mechanismfrom the middle-seventeenth to the early-twentieth ...
Life history or stylistic variation? A geometric morphometric method for evaluation of Fishtail point variability
(Elsevier, 2019-10)
Fishtail points are considered an indicator of the presence for one of the earliest and most successful human adaptations during the late Pleistocene in South America (~12,900–12,200 cal BP). Although these points display ...
Testing repeatability, measurement error and species differentiation when using geometric morphometrics on complex shapes: a case study of Patagonian lizards of the genus Liolaemus (Squamata: Liolaemini)
(Wiley Blackwell Publishing, Inc, 2020-07-14)
The repeatability of findings is the key factor behind scientific reliability, and the failure to reproduce scientificfindings has been termed the "replication crisis". Geometric morphometrics is an established tool in ...
Shell morphology changes in the scallop Aequipecten tehuelchus during its life span: A geometric morphometric approach
(Inter-Research, 2010-12)
Shell morphology is a central feature of bivalve biology in fields such as taxonomy, evolution, and functional anatomy. When allometric shell growth occurs, traditional morphometric methods usually fail to provide robust, ...
Carapace shape of some trichodactylidae crabs: Analysis by geometric tools as a possible way of including females in taxonomic differentiation
(Institut Catalá de Paleontologia, 2009-10)
The family Trichodactylidae characterizes the aquatic environments of the plain, being the Paraná River an important system in the continent. The taxonomic studies of this group were based on carapace ornamentation and ...