Global InformationPytine information
| Pytine Temporal range: Early[1] to Late Arenig[2]
| |
|---|---|
| |
| P. graia | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | †Trilobita |
| Order: | †Asaphida |
| Family: | †Raphiophoridae |
| Genus: | †Pytine Fortey, 1975 |
| Type species | |
| Pytine graia Fortey, 1975
| |
| Species | |
| |
| Synonyms | |
| |
Pytine is an extinct genus of asaphid trilobites. Species lived during the later part of the Arenig stage of the Ordovician Period,[2] approximately 478 to 471 million years ago. Various species are found in the Svalbard, Valhallfonna Formation, Olenidsletta, Member, of Spitzbergen, Norway, the Megistaspis (Paramegistaspis) planilimbata Zone of the 'Shumardia Shale' of Sweden, Jujuy Province, Argentina, early Arenig-aged strata of Jiangxi province, China, and Darriwilian-aged strata in Western Hunan province, China. The type species, P. graia, has seven thorax segments, and lacks the rapier-like glabellar spine, that occurs in many other raphiophorids.[3] The Chinese species, by contrast, have only six thoracic segments.[1] So far, only the type species, and one of the Chinese species, P. laevigata (synonym= Jiuxiella laevigata), are known from complete specimens.[1]
- ^ a b c d Vaccari, N. EMILIO, BEATRIZ G. Waisfeld, BRIAN DE Chatterton, and G. D. Edgecombe. "New raphiophorid trilobites from the Ordovician of Argentina and their biogeographic implications." MEMOIR-ASSOCIATION OF AUSTRALASIAN PALAEONTOLOGISTS 32 (2006): 353. [1]
- ^ a b Sepkoski, J. (2002). "A compendium of fossil marine animal genera (Trilobita entry)". Bulletins of American Paleontology. 364: 560. Retrieved 2008-01-12.
- ^ Fortey, R.A. (1975). The Ordovician Trilobites of Spitsbergen [II. Asaphidae, Nileidae, Raphiophoridae and Telephinidae of the Valhallfonna Formation]. Norsk Polarinstitutt Skrifter. Vol. 162. Oslo: Norsk Polarinstitutt.