Species

Trichichnus linearis Frey, 1970

Taxon description

Razzolini et al., 2016

Remarks. Trichichnus occurs mostly in fine-grained, shallow-water (e.g. Frey, 1970) as well as from deep-sea deposits e.g. Kennedy, 1975; Wetzel, 1981). A strong tendency to pyritization is typical of this form (e.g. Werner and Wetzel, 1981).

Hanken et al., 2016

Descroption. This is a differently oriented, curved-to-slightly winding, rarely branched, thin, thread-like trace fossil. Its fill is rustyferruginous, probably after oxidization of pyrite. The external diameter ranges from 1 to 2.5 mm, but its original size was smaller, and it seems that the ferruginous material expanded outward due to concretional growth. The ferruginous halo can attain 5 mm in diameter.

Frey, 1970a

DIAGNOSIS.—Rarely branched, dominantly vertical, threadlike, cylindrical trichichnid burrows having distinct walls, commonly lined with diagenetic minerals.

Synonymy list

1970 Trichichnus linearis, Frey, n. sp. — Frey , pp. 20, fig. 4A; 6: 5-7; text fig. 4A

1999 Trichichnus linearis, Frey, 1970 — Uchman , pp. 100, fig. 9:5

2001 Trichichnus linearis, Frey, 1970 — Uchman , pp. 10

2007 Trichichnus linearis, Frey, 1970 — Uchman , pp. 991-992, fig. 5D

2012 Trichichnus linearis, Frey, 1970 — Stachacz , pp. 112, fig. 6D,E

2016 Trichichnus linearis, Frey, 1970 — Harper et al. , pp. 207, fig. 11E-F

Classification

Organism group	Biota
Ichnofossil group	Ichnofossils
	Bioturbation trace fossils
Genus	Trichichnus
Species	appendicus
	linearis