Species

Treptichnus bifurcus Miller, 1889

Taxon description

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.

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).

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).

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).

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

1996 Treptichnus bifurcus Miller, 1889 — Paczesna , pp. 62 , fig. Pl. XXII:3, 5-7; Pl. XXIII:1

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

Classification

Organism group	Biota
Ichnofossil group	Ichnofossils
	Soft-sediment trace fossils
Genus	Treptichnus
Species	aequalternus
	apsorum
	bifurcus
	coronatum
	lublinensis
	meandrinus
	pedum
	pollardi
	rectangularis
	triplex
	vagans