The aim of this research is to determine whether geometric morphometric (GM) techniques can provide insights into how the shape of the mandibular corpus differs between bonobos and chimpanzees and to explore the potential implications of those results for our understanding of hominin evolution. We focused on this region of the mandible because of the relative frequency with which it has been re...

Fishes of the family Cichlidae are famous for their spectacular species flocks and therefore constitute a model system for the study of the pathways of adaptive radiation. Their radiation is connected to trophic specialization, manifested in dentition, head morphology, and body shape. Geometric morphometric methods have been established as efficient tools to quantify such differences in overall...

The ways in which embryo development can vary across individuals of a population determine how genetic variation translates into adult phenotypic variation. The study of developmental variation has been hampered by the lack of quantitative methods for the joint analysis of embryo shape and the spatial distribution of cellular activity within the developing embryo geometry. By drawing from the s...

February 19, 2015 Date 2015-02-11 Type Package Title Geometric Morphometric Analyses of 2d/3D Landmark Data Version 2.1.3 Author Dean Adams, Michael Collyer, Erik Otarola-Castillo, Emma Sherratt Maintainer Dean Adams Depends rgl, R(>= 3.1.0) Imports jpeg, ape, geiger, phytools Description Geomorph allows users to read, manipulate, and digitize landmark data, generate shape...

The finding of Panstrongylus geniculatus nymphs inside a house in northeastern Antioquia, Colombia, and the reports related to their increasing presence in homes suggest the need for surveillance methods for monitoring the invasion processes. We analyzed the morphological differences between a wild population and its laboratory descendants, using the techniques of geometric morphometry, with th...

Beak size and shape in Darwin's finches have traditionally been quantified using a few univariate measurements (length, depth, width). Here we show the improved inferential resolution of geometric morphometric methods, as applied to three hierarchical levels: (i) among seven species on Santa Cruz Island, (ii) among different sites on Santa Cruz for a single species (Geospiza fortis), and (iii) ...

Understanding interspecific morphometric variation is a prerequisite of species identification, evolutionary and taxonomic studies. The external features (i.e. ratios) five Macrobrachium viz., rosenbergii, M. lanchesteri, dolichodactylus, idella lamarrei from three rivers in northern Bangladesh, were used to analyze variation. samples collected Jamuneshwari river, Tangon river Atrai river. Morp...