The pygidium (pl.: pygidia) is the posterior body part or shield of crustaceans and some other arthropods, such as insects and the extinct trilobites. In groups other than insects, it contains …

The meaning of PYGIDIUM is a caudal structure or the terminal body region of various invertebrates.

2009年11月12日 · The pygidium is a tail piece composed of a variable number of fused segments at the posterior end of a trilobite. While the cephalon of a trilobite is typically wider than the …

2012年7月22日 · pygidium noun, plural pygidia - the last dorsal segment of the abdomen. Prominent in many beetles, but of course, also distinctive in other groups.

The Pygidium. The pygidium may be a rounded or tapering simple structure with the anus opening either dorsally or terminally, but frequently it carries anal (or pygidial) cirri. Commonly one or …

2018年5月8日 · pygidium (adj. pygidial) The posterior part of the exoskeleton of a trilobite (Trilobita); it is generally formed by the fusion of several body segments but in some Cambrian …

Pygidium definition: The end division of the body of a trilobite or of certain annelids, crustaceans, or insects.