Cyclograptus Spencer, 1884

Rickards, R. B., Chapman, A. J., Wright, A. J. & Packham, G. H, 2003, Dendroid and Tuboid Graptolites from the Llandovery (Silurian) of the Four Mile Creek Area, New South Wales, Records of the Australian Museum 55 (3), pp. 305-330 : 328

Cyclograptus Spencer, 1884

Type species. Cyclograptus rotadentatus Spencer, 1884, p. 42 ; by original designation.

Remarks. Bulman (1970) referred to the branching of stipes at their mid-length in his revised diagnosis of the genus. However, the original material is not quite so consistent as this, as pointed out by Bouěek (1957) who recorded much longer stipes in some species than in the type species. In Bouěek’s species ( C. irregularis and C. multithecatus ) and C. scharyanus ( Göppert, 1860) the stipes divide at roughly mid-length, but with additional bifurcations occurring. Bouěek (1957: p. 141) also questioned whether, given such long stipes, all the autothecae must originate in the thecorhiza: it seems unlikely.