| 词条 | Pinus yorkshirensis |
| 释义 |
| name = Pinus yorkshirensis | fossil_range = {{fossilrange|Hauterivian|Barremian}} | image = | image_caption = Partial fossil | image_width = 250px | regnum = Plantae | divisio = Pinophyta | classis = Pinopsida | ordo = Pinales | familia = Pinaceae | genus = Pinus | subgenus = Pinus | species = P. yorkshirensis | binomial = Pinus yorkshiensis | binomial_authority = Mapes, 2012 }} Pinus yorkshirensis is an extinct species of pine tree. The fossil pine cone came from Hauterivian and Barremian-aged sedimentary rocks located in the Speeton Clay in Yorkshire (hence the species epithet). Discovery and namingThe type specimen of P. yorkshirensis was discovered during a field trip at the University of Birmingham. It is one of four known fossil pine cones from Europe. It was 5 million years older than the previous record holder, Pinus belgica.[1] The fossil was destroyed for science so scientists could study the fossil in more detail. All that remains are a few microscope slides and a single image. They are currently housed at Lapworth Museum of Geology. References1. ^{{cite journal |author1=Patricia E. Ryberg |author2=Gar W. Rothwell |author3=Ruth A. Stockey |author4=Jason Hilton |author5=Gene Mapes |author6=James B. Riding |year=2012 |title=Reconsidering Relationships among Stem and Crown Group Pinaceae: Oldest Record of the Genus Pinus from the Early Cretaceous of Yorkshire, United Kingdom |journal=International Journal of Plant Sciences |volume=173 |issue=8 |pages=917–932 |doi=10.1086/667228 }} 2 : Extinct plants|Pinaceae |
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