Facial reduction is a phenomenon described extensively in the evolutionary, clinical, and veterinary literature. Despite fact that this applies to variety of species can even be found clinical medical literature (midfacial hypoplasia, craniosynostosis conditions, etc.), it has not been analyzed comprehensively using geometric morphometric approach. The goal study was improve our understanding f...

Nematode volume and surface area are usually based on the inappropriate assumption that the animal is cylindrical. While nematodes are approximately circular in cross section, the radius varies longitudinally. We use standard morphometric data to obtain improved estimates of volume and surface area based on (i) a geometrical approach and (ii) a Bézier representation of the nematode. These new e...

UNLABELLED PREMISE OF THE STUDY I present a protocol for creating geometric leaf shape metrics to facilitate widespread application of geometric morphometric methods to leaf shape measurement. • METHODS AND RESULTS To quantify circularity, I created a novel shape metric in the form of the vector between a circle and a line, termed geometric circularity. Using leaves from 17 fern taxa, I pe...

In the present work, we investigated whether it is possible to detect morphometric changes in Rhodnius neglectus Lent, 1954 (a candidate vector of Chagas disease in Central Brazil) populations in the transition from sylvatic to laboratory conditions. We analyzed size and shape variation in wings of sylvatic parents and their laboratory descendents (first, third and fifth generations) using geom...