Phacops, genus ntawm trilobites (ib pawg ntawm cov dej arthropods uas ploj lawm) pom li pob txha hauv Silurian thiab Devonian pob zeb (nruab nrab ntawm 359 lab thiab 444 lab xyoo) hauv Europe thiab North America.
Thaum twg muaj trilobites?
Cov arthropods thaum ub tau sau lub ntiaj teb cov dej hiav txwv los ntawm cov theem ntxov tshaj plaws ntawm Cambrian Lub Sijhawm, 521 lab xyoo dhau los, txog thaum lawv qhov kawg tuag thaum kawg ntawm Permian, 252 lab xyoo. dhau los, ib lub sijhawm uas ze li 90 feem pua ntawm lub neej hauv ntiaj teb tau raug tshem tawm sai sai.
Phacops fossil muaj pes tsawg xyoo?
Phacops rana yog ib qho pob txha rau nruab nrab Devonian (382 lab xyoo dhau los txog 393 lab xyoo dhau los) hnub nyoog pob zeb ntawm Devonian Lub Sij Hawm.
Phacops nyob ntev npaum li cas?
Age: Middle Devonian, ~387 - 378 m.y.
Phacops nyob qhov twg?
Phacops yog ib hom ntawm trilobites nyob rau hauv kev txiav txim Phacopida, tsev neeg Phacopidae, uas nyob hauv Tebchaws Europe, qaum teb hnub poob teb chaws Africa, North thiab South America thiab Tuam Tshojlos ntawm lig Ordovician mus txog rau thaum kawg. kawg ntawm Devonian, nrog lub sijhawm dav dav piav qhia los ntawm Late Ordovician.
