Graptolithina

Graptolite morphology illustrated from the Encyclopædia Britannica.

Thallograptus sphaericola, a dendroid graptolite, attached to the cystoid Echinosphaerites aurantium; Ordovician of northeastern Estonia.

Pendeograptus fruticosus from the Bendigonian Australian Stage (Lower Ordovician; 477-474 mya) near Bendigo, Victoria, Australia. Two overlapping, three-stiped rhabdosomes

Graptolithina is a class of hemichordate animal, the members of which are known as graptolites. Graptolites are fossil colonial animals known chiefly from the Upper Cambrian through the Lower Carboniferous (Mississippian). A possible early graptolite, Chaunograptus, is known from the Middle Cambrian.

单词	graptoloids
释义	graptoloids /ˌɡræp'tɔlɔidz/ 英汉-汉英词典正笔石类词组 \| 习惯用语您要查找的是不是： graphologist n. 笔相家 cryptologic 密码逻辑网络短语: graptoloids 正笔石类英语百科 Graptolithina Graptolithina is a class of hemichordate animal, the members of which are known as graptolites. Graptolites are fossil colonial animals known chiefly from the Upper Cambrian through the Lower Carboniferous (Mississippian). A possible early graptolite, Chaunograptus, is known from the Middle Cambrian.
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graptoloids /ˌɡræp'tɔlɔidz/

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Graptolithina