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).

Frey, 1970a

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

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.

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
	Soft-sediment trace fossils
Genus	Trichichnus
Species	appendicus
	linearis