Pterobranchia, members of which are often called pterobranchs, is a class of small worm-shaped animals. They belong to the Hemichordata, and live in secreted...

Cambrian and include two main classes: Enteropneusta (acorn worms), and Pterobranchia. A third class, Planctosphaeroidea, is known only from the larva of...

colonial animals, members of the subclass Graptolithina within the class Pterobranchia. These filter-feeding organisms are known chiefly from fossils found...

The pterobranchia mitochondrial code (translation table 24) is a genetic code used by the mitochondrial genome of Rhabdopleura compacta (Pterobranchia)....

Entoprocta Gastrotricha Gnathostomulida Enteropneusta (acorn worms) Pterobranchia Allomalorhagida Cyclorhagida Loricifera Aplacophora Bivalvia (clams...

Rhabdopleura is a genus of colonial sessile hemichordates belonging to the Pterobranchia class. As one of the oldest living genera with a fossil record dating...

Hemichordata Class Planctosphaeroidea Class Enteropneusta (acorn worms) Class Pterobranchia Phylum Echinodermata Subphylum Asterozoa Class Asteroidea (starfish)...

The Indian Point Formation is a geologic formation in Quebec. It preserves fossils dating back to the Ludlow epoch of the Silurian period. The Indian Point...

Pyrosome or Ectoprocta) or share a common exoskeleton (e.g. Bryozoa or Pterobranchia). The colonial organism as a whole is called a zoon /ˈzoʊ.ɒn/, plural...

The Tenjong Dendang Formation is a geologic formation in Malaysia. The band of graptolite- and trilobite-bearing shales interbedded in limestones preserves...