English

---

Graptolite ultrastructure: (a) collage of Geniculograptus rhabdosome showing banded fusellar tissue (×50); (b) detailed section through part of a rhabdosome showing relatively thin, parallel sheet fabric (top) and criss-cross fusellar fabric (below) (×1000); and (c) detail of aperture exterior of Geniculograptus showing the development of bandages (×500). (Courtesy of Denis Bates.)

Zdroj: Benton a Harper: Introduction to the Paleobiology