Species

Gyrolithes gyratus (Hofmann, 1979)

Taxon description

Laing et al., 2018

Diagnosis: Unlined, smooth, narrow-form, tightly coiled Gyrolithes. High burrow radius to whorl radius ratio i.e. narrow-form (=0.5-1; avg. 0.8), low height between whorls to burrow width ratio i.e. tightly coiled (=1.3-2.5; avg. 1.6), and low height between whorls to whorl circumference ratio i.e. shallow whorl incline (=0.3-0.4; avg. 0.4).

Synonymy list
1979     Skolithos gyratus isp. nov. — Hofmann , fig. 15A-E
2017     Skolithos annulatus — Herringshaw et al. , pp. 375, fig. 3A
2018     Gyrolithes gyratus (Hofmann, 1979) — Laing et al. , pp. 178, fig. Figs. 3D, F; 4A;