Dictyonema (graptolite)

Dictyonema is a genus of dendroid graptolites in the order Dendroidea.

Fossil record
Fossils of Dictyonema are found from the Upper Cambrian to the Devonian (age range: from 488.3 to 383.7 million years ago.). They are known from various localities in Europe, North America, South America, China and Morocco.

Description
These colonial organism are characterized by a conical, net-like structure. The colonies (known as rhabdosomes) are branched and may vary from almost discoidal to almost cylindrical. They were stationary planktonic suspension feeders.

Species

 * †Dictyonema macgillivrayi (Hall 1899)
 * †Dictyonema pulchellum (Hall 1899)
 * †Dictyonema retiforme (Hall 1843)