Biology:Dictyonema (graptolite)
From HandWiki
Short description: Genus of marine worm-like animals
| Dictyonema | |
|---|---|
| |
| Dictyonema retiforme from Early Silurian of Canada (425 myo) | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| Order: | † Dendroidea
|
| Family: | |
| Genus: | Dictyonema Hall, 1851
|
| Synonyms[1] | |
| |
Dictyonema is a genus of dendroid graptolites in the order Dendroidea.[1]
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.[1][2]
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.[1][2]
Species
- †Dictyonema macgillivrayi (Hall 1899)
- †Dictyonema pulchellum (Hall 1899)
- †Dictyonema retiforme (Hall 1843)
Bibliography
- Bulman, O. M. B. 1970. Graptolithina with sections of Enteropneusta and Pterobranchia. In Treatise on Invertebrate Paleontology Part V 2nd ed. (C. Teichert, ed.) pp. V1-V149. The Geological Society of America, Inc.: Boulder (Colorado), and the University of Kansas: Lawrence (Kansas).
- Fletcher, H. O. 1971. Catalogue of type specimens of fossils in the Australian Museum, Sydney. Australian Museum Memoir 13: 1-167.
- Jaanusson, V. 1979. Ordovician. In: Robison, R. A., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt A. Introduction. Fossilisation (Taphonomy), Biogeography and Biostratigraphy pp. A136-A166. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).
- Kozłowski, R. 1948. Les graptolithes et quelques nouveaux groupes d’animaux du Tremadoc de la Pologne. Palaeontologica Polonica 3: I-XII, 1-235.
- Rudolf Ruedemann - Graptolites of North America – Geological Society of America
References
- ↑ 1.0 1.1 1.2 1.3 Christopher Taylor Variety of life
- ↑ 2.0 2.1 Paleobiology Database Paleobiology Database
Wikidata ☰ Q3026778 entry
 |  |
