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標題: 保存了三葉蟲卵的化石 [打印本頁]

作者: 寒武紀    時間: 2017-1-19 11:06 PM     標題: 保存了三葉蟲卵的化石

來自美國紐約奧陶紀時期的黃鐵礦化三葉蟲化石,保存了軟體部份的附肢及觸角外,還保存了牠們的卵,有興趣可閱讀其研究的論文

[attach]9010[/attach]
A: Ventrally preserved specimen (Yale Peabody Museum [YPM] 535703) showing nine eggs in the specimen’s left genal angle.
B: Ventrally preserved specimen (YPM 535704) showing four eggs in the specimen’s right genal angle.
C: Close-up of the egg-bearing region from the specimen in B.
D: Close up of the egg-bearing region from the specimen in A.
E: Scanning electron microscopy (SEM) image of the eggs from the specimen in A and D. Note that the perspective is twisted ~180° from that in D.
F: SEM image of an egg from E.
G: Close-up SEM image of the egg surface from F. Note the dominant framboids and rare euhedral crystals of pyrite.
H: Close-up of a limb from A. Note the dominant framboids and rare euhedral crystals of pyrite.
I: SEM image of a disarticulated cranidium (YPM 238366) that was replaced with pyrite.
J: SEM image showing the replacement fabric from I. Note the dominant euhedral crystals of pyrite.

圖片附件: Trilobite eggs.jpg (2017-1-19 11:06 PM, 122.5 K) / 該附件被下載次數 44
http://www.fossilshk.com/forum/attachment.php?aid=9010


作者: 寒武紀    時間: 2017-1-20 01:25 AM     標題: 研究的論文下載



附件: Pyritized in situ trilobite eggs from the Ordovician.pdf (2017-1-20 01:25 AM, 593.39 K) / 該附件被下載次數 74
http://www.fossilshk.com/forum/attachment.php?aid=9011
作者: trump    時間: 2017-1-22 05:02 PM

三葉蟲的蛋那麼小嗎? 但從來沒見過三葉蟲的化石幼體是這大小
作者: c7    時間: 2017-3-7 04:39 PM

成體約2to 3 厘米,幼體才1MM都沒有,相差很大
作者: trilo    時間: 2017-4-1 05:08 AM






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