Meanings
- biologyMultiply gyrate, like the protoconches of various Gemmula ammonites. ?
... polygyrate or bidichotomous to fasciculate (rarely virgatotome) ribs, more loosely spaced and coarser. External whorls of macroconch forms with dichotomous to polygyrate ribs[…]
1977, Acta geologica polonica2 more examples
[...] polygyrate diagonally cancellated protoconch, but in that genus the adult whorls are pagodiform, strongly keeled[…] polygyrate to paucispiral and almost smooth, and the reversed L-sinus is sometimes rendered U-shaped to subtubular, when restricted above by a parietal tubercle. The Daphnellids are very numerous in both genera and species[…]
1953, Auckland Institute and Museum, Bulletin of the Auckland Institute and Museum[...] gyrate furcation, and often a tendency to become fasciculate or virgatotome; secondary ribs obsolescent in some [...] polygyrate ribs and intercalatory secondaries. Microconchs 100-112 mm. in diameter with following rib densities[…]
1967, J. C. W. Cope, The Palaeontology and Stratigraphy of the Lower Part of the Upper Kimmeridge Clay of Dorset
Cite this entry
polygyrate. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/polygyrate
“polygyrate.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/polygyrate. Accessed November 3, 2026.
WatkinsX Dictionary, s.v. “polygyrate,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/polygyrate.
Source: polygyrate on Wiktionary, CC BY-SA 4.0.