Anabarites hariolus

Kouchinsky, Artem, Bengtson, Stefan, Landing, Ed, Steiner, Michael, Vendrasco, Michael & Ziegler, Karen, 2017, Terreneuvian stratigraphy and faunas from the Anabar Uplift, Siberia, Acta Palaeontologica Polonica 62 (2), pp. 311-440 : 423

Anabarites hariolus (Val’kov, 1987)

Fig. 76E .

Material.—Single specimen, SMNH X3697, from sample 96-5a/34.5, Emyaksin Formation, eastern Anabar Uplift, Siberian Platform, Russia. Correlated with lower part of Cambrian Stage 2.

Description.—Tube almost straight, expands rapidly, with three prominent T- or Y-shaped longitudinal lobes separated by deep grooves. Each of the lobes apically has a second-order groove that shallows and disappears apically.

Remarks.—See Kouchinsky et al. (2009) for discussion.

Stratigraphic and geographic range.— Cambrian Stage 2, Siberian Platform.

Figures

Fig. 76. Anabaritids from early Cambrian Medvezhya (A–D) and Emyaksin (F, E) formations, Anabar Uplift, Siberia, Russia; samples K2/25 (A, B), K2/26 (C), section 3; 5/0 (F), section 96-5; 5a/34.5 (E), section 96-5a; and 1/29.2 (D), section 1. A–C, F. Anabarites tristichus Missarzhevsky in Rozanov et al., 1969, SMNH X3671 (A; see also Kouchinsky et al. 2009: fig. 26C), SMNH X3672 (B; see also Kouchinsky et al. 2009: fig. 26D), SMNH X3409 (C; see also Kouchinsky and Bengtson 2002: figs. 2, 3 and Kouchinsky et al. 2009: fig. 26A, B), SMNH X6027 (F). A, B, F, lateral views of calcium phosphatic internal moulds; C1, lateral view of celestite-barite replaced tube with calcium phosphatic internal mould; C2, internal protrusion of the wall enlarged; C3, transverse view. D. Anabarites hexasulcatus (Missarzhevsky, 1974), SMNH X6028; D1, lateral; D2, transverse views. E. Anabarites hariolus (Val’kov, 1987), SMNH X3697 (see also Kouchinsky et al. 2009: fig. 36K–M). E1, transverse view of apertural end; E2, E3, lateral views; E4, transverse view of apical end. Scale bar 25 μm (C2), 500 μm (A, B, C1, C3, D–F).