Chaetosalpinx is an ichnogenus of bioclaustrations (a type of trace fossil

Trace fossil

Trace fossils, also called ichnofossils , are geological records of biological activity. Trace fossils may be impressions made on the substrate by an organism: for example, burrows, borings , urolites , footprints and feeding marks, and root cavities...

). Chaetosalpinx includes straight to sinous cavities that are parallel to the host’s axis of growth. The cavity is circular to oval in cross-section and it lacks a wall lining or floor-like tabulae (Tapanila 2005). They are common in tabulate and rugose corals

Rugosa

Disambiguation:The Rugosa Rose is also sometimes just called "Rugosa". For the moon in Star Wars: The Clone Wars, see .The Rugosa, also called the Tetracoralla, are an extinct order of coral that were abundant in Middle Ordovician to Late Permian seas.Solitary rugosans are often referred to...

 from Late Ordovician

Ordovician

The Ordovician is a geologic period and system, the second of six of the Paleozoic Era, and covers the time between 488.3±1.7 to 443.7±1.5 million years ago . It follows the Cambrian Period and is followed by the Silurian Period...

 to Devonian

Devonian

The Devonian is a geologic period and system of the Paleozoic Era spanning from the end of the Silurian Period, about 416.0 ± 2.8 Mya , to the beginning of the Carboniferous Period, about 359.2 ± 2.5 Mya...

of Europe and North America (Tapanila 2005, Mõtus and Vinn 2009). They may have been parasites (Zapalski 2007).