|
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:handshake
[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. |
|
| 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 |
|
| 成體約2to 3 厘米,幼體才1MM都沒有,相差很大 |
Powered by Discuz! Archiver 4.1.0
© 2001-2006 Comsenz Inc.
Processed in 0.005307 second(s), 2 queries |