寒武紀
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UID 3
精華
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積分 1881
帖子 1313
閱讀權限 100
註冊 2007-7-19
狀態 離線
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[廣告]:
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
 圖片附件: Trilobite eggs.jpg (2017-1-19 11:06 PM, 122.5 K)
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.
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寒武紀:生命的伊甸園 |
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