A review of the postembryonic development of millipedes (Diplopoda) is given, based
mainly on published information. Original observations are, however, also included …

To some potential readers of this book the description of Biological System atics as an art
may seem outdated and frankly wrong. For most people art is subjective and unconstrained …

Insight into the origin and early evolution of the animal phyla requires an understanding of
how animal groups are related to one another. Thus, we set out to explore animal phylogeny …

The three major taxa with metameric segmentation (annelids, arthropods, and chordates)
appear to use three very different molecular strategies to generate segments. However …

New millipede specimens from the Paleozoic of Scotland are described, including
Archidesmus macnicoli Peach, 1882, from the Lower Devonian (Lochkovian) …

Over any period of evolutionary time, the prevailing ontogenetic trajectory within a lineage
may either recur unchanged from generation to generation (stasis) or alter (developmental …

The diversity of the arthropod body plan has long been a fascinating subject of study. A flurry
of recent research has analyzed Hox gene expression in various arthropod groups, with …

Cladistic relationships of Trilobita, Naraoiidae (five ingroup taxa), Helmetiida (five ingroup
taxa), Xandarellida, and the Cambrian arachnates Retifacies, Sinoburius, Emeraldella, and …

One of the most important questions in evolutionary biology is: what orients the evolutionary
process? That is, what causes evolution to proceed toward certain developmental …

The number of leg-bearing segments in centipedes varies extensively, between 15 and 191,
and yet it is always odd [1, 2]. This suggests that segment generation in centipedes involves …