Ichnofossils

Treptichnus bifurcus Miller, 1889

Taxon description

Hammersburg et al., 2018

Diagnosis.—Burrow system with short projections between elongate, thin, and horizontal burrow segments forming straight to slightly curved, zigzagged chains; may occur as chains of evenly spaced beads or depressions alternating around central axis, forming zigzag pattern (Buatois & Mángano, 1993a; Uchman, Bromley, & Leszczyński, 1998).

Rindsberg & Kopaska-Merkel, 2005

Emended diagnosis. Subhorizontal burrow consisting of a series of U-shaped segments joined angularly at or near their ends; burrow commonly but not invariably zigzag; surface of burrow smooth.


 

Uchman et al., 1998

Diagnosis: Treptichnus having short, twiglike projections at the angle of junction between elongated, horizontal and thin burrow segments; projections situated, as determined by the zigzag, on alternate sides of the trace fossil (modified from Maples and Archer, 1987; Buatois and Mângano, 1993).

Buatois & Mángano, 1993a

Diagnosis: Treptichnus having short twiglike projections at the angle of juncture between elongated, horizontal and thin burrow segments; projections situated on alternate sides of trace, representing bedding plane expressions of oblique shafts (modified from Maples and Archer, 1987).

Synonymy list
1889     Treptichnus bifurcus — Miller, pp. 581, fig. 1096
1889     Plangtichnus erraticus — Miller, pp. 580, fig. 1093
1889     Haplotichnus — Miller
1993     Treptichnus bifurcus Miller, 1889 — Buatois & Mángano, pp. 221, fig. 2
1997     non Treptichnus bifurcus — Jensen, pp. 91, fig. 62A
1998     Treptichnus bifurcus Miller 1889 — Buatois et al., pp. 158, fig. 4.6
1998     Treptichnus bifurcus Miller 1889 — Uchman et al., pp. 273
2004     Treptichnus bifurcus Miller, 1889 — Knaust, pp. 18, fig. 7.7
2005     Treptichnus bifurcus — Rindsberg & Kopaska-Merkel, pp. 134-135, fig. 10, 11
2012     Treptichnus bifurcus — Chen et al., fig. 7A
2017     Treptichnus bifurcus (Miller, 1889) — Getty & Bush, pp. 236
2018     Treptichnus bifurcus (Miller, 1889) — Hammersburg et al., pp. 41, fig. Fig. 10.5; 13.5; 21.1–21.6; and 22.1–22.3