Pytine
Extinct genus of trilobites / From Wikipedia, the free encyclopedia
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]
Pytine | |
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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 | |
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Synonyms | |
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