Glyptograptus

Glyptograptus dentatus, photographed by Gennadi Baranov.

Belongs within: Reclinata.

Glyptograptus is a genus of graptoloids known from the Lower Ordovician to the Lower Silurian, characterised by the curvature of their thecae (Bulman 1970).

Characters (from Bulman 1970): Thecae with gentle sigmoid curvature; supragenicular wall almost straight, sloping outwards, or rarely with gentle double curvature and everted apertures; apertural margin commonly undulate.

Glyptograptus Lapworth 1873 B70
    |  i. s.: G. intersitus B70
    |         G. persculptus B70
    |         G. teretiusculus F71
    |--G. (Glyptograptus) B70
    |    |--*G. (G.) tamariscus (Nicholson 1868) [=Diplograptus tamariscus] B70
    |    |--G. (G.) dentatus B70
    |    |    |--G. d. dentatus B70
    |    |    `--G. d. appendiculatus B70
    |    `--G. (G.) rostratus (Sherrard 1949) [=Diplograptus (G.) rostratus] F71
    `--G. (Pseudoglyptograptus Bulman & Rickards 1968) B70
         `--G. (*P.) vas Bulman & Rickards 1968 B70

*Type species of generic name indicated

REFERENCES

[B70] Bulman, O. M. B. 1970. Graptolithina with sections of Enteropneusta and Pterobranchia. In Treatise on Invertebrate Paleontology Part V 2^nd ed. (C. Teichert, ed.) pp. V1-V149. The Geological Society of America, Inc.: Boulder (Colorado), and the University of Kansas: Lawrence (Kansas).

[F71] Fletcher, H. O. 1971. Catalogue of type specimens of fossils in the Australian Museum, Sydney. Australian Museum Memoir 13: 1-167.