Incredible new information about Cambrian trilobite soft tissues just out. Look at these scans...the central head structures (hypostome/labrum/mouth) are so clearly resolved in these half-billion-year-old specimens. Jaw-dropping (no pun intended) https://t.co/1eF5VWVK4xpic.twitter.com/5CijtiAVEh
— D. Allan Drummond Art (@dadrummondart) June 27, 2024
Never-before-seen trilobite soft tissue! Turns out they had a soft labrum connected to the hypostome, and even more going on under the head! Some truly incredible fossils. https://t.co/J2RFnxyxWMpic.twitter.com/S3hgeJ1Ujc
— Prehistorica (Christian M.) (@Prehistorica_CM) June 27, 2024
From a Pompeii-like ash burial in Morocco, a new study presents 3D trilobite fossils with a remarkably well-preserved anatomy. The results point to marine volcanic ash deposits as important sites of exceptional fossil preservation.
グソクムシやフナムシの方ががっしりした作りだね。
カブトガニとは構造は似ていないね。
後期にはがっしりした種やディクラヌルスみたいな
奇抜な種も出てきて、もし滅んでなければ現代で
人気のペットになっただろうになぁ、、、、おしい。
エラは足と甲の間にあったんだな
エビとかは浮いてる胴の殻の内側にエラがあるけど
甲殻類と遠いようで近いんだな