Feathered dinosaur the deciduous sheath, forming a tuft of unbranched barbs with a basal calamus. Stage III consists of two developmental novelties, IIIa and IIIb, as either could have occurred first. Stage IIIa involves helical displacement of barb ridges arising within the collar. The barb ridges on the anterior midline of the follicle fuse together, forming the rachis. The creation of a posterior barb locus follows, giving an indeterminate number of barbs. This resulted in a feather with a symmetrical, primarily branched structure with a rachis and unbranched barbs. In stage IIIb, barbules paired within the peripheral barbule plates of the barb
Calamus caryotoides Calamus caryotoides Calamus caryotoides (also "Palmijuncus caryotoides"), more commonly known as fishtail lawyer cane is a North-East Queensland tropical forest climbing palm with very thin () flexible trunks; no crownshaft; small spikes; dark green, glossy, fish-tail shaped leaves reaching up to high ( spread); and very thin hooked flagella. It tends to clump and grow up into the shaded understory of Queensland's wet tropical forests, and is a close relative of the more infamous "Calamus radicalis" (aka Wait-a-While). The Cairns Botanical Gardens records local Yidinydji, Yirrganyydji, Djabuganydji, and Gungganydji use "Calamus caryotoides" (also known to Yidinydji as Bugul, pronounced BOOK-KOOL)