''Palaeoconchus'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

microconchid The order Microconchida is a group of small, spirally-coiled, encrusting fossil "worm" tubes from the class Tentaculita found from the Upper Ordovician to the Middle Jurassic (Bathonian) around the world. They have lamellar calcitic shells, u ...

tubeworms. Their tubes have pseudopunctae penetrating the tube wall. Tubes lumen is smooth. ''Palaeoconchus'' occurs in the Late

Ordovician The Ordovician ( ) is a geologic period and System (geology), system, the second of six periods of the Paleozoic Era (geology), Era, and the second of twelve periods of the Phanerozoic Eon (geology), Eon. The Ordovician spans 41.6 million years f ...

of Baltica and Avalonia. In the

Devonian The Devonian ( ) is a period (geology), geologic period and system (stratigraphy), system of the Paleozoic era (geology), era during the Phanerozoic eon (geology), eon, spanning 60.3 million years from the end of the preceding Silurian per ...

it had a global distribution.

References

{{Taxonbar, from=Q16987152 Enigmatic protostome taxa Tentaculita Ordovician invertebrates Silurian animals Devonian animals Late Devonian animals Devonian animals of Europe Late Ordovician first appearances Devonian extinctions