Lochriea

{{Short description|Extinct genus of jawless fishes}}

{{Automatic taxobox

| fossil_range = {{fossil range|Visean|Serpukhovian}}

| taxon = Lochriea

| authority = Scott, 1942{{cite journal |title=Conodont Assemblages from the Heath Formation, Montana |first1=Harold W. |last1=Scott |journal=Journal of Paleontology |volume=16 |issue=3 |year=1942 |pages=293–300 |jstor=1298905}}

| subdivision_ranks = Species

| subdivision =

  • Lochriea costata
  • Lochriea commutata (P1 type element)
  • Lochriea cruciformis
  • Lochriea monocostata
  • Lochriea montanaensis (M type element)
  • Lochriea monocarinata{{Cite journal|last=Zhuravlev|first=Andrey V.|date=2024-11-21|title=A new species, Lochriea monocarinata n. sp., and its position in the morphospace of the genus Lochriea Scott, 1942 (Conodonta, Mississippian)|url=https://bioone.org/journals/geodiversitas/volume-46/issue-18/geodiversitas2024v46a18/A-new-species-Lochriea-monocarinata-n-sp-and-its-position/10.5252/geodiversitas2024v46a18.full|journal=Geodiversitas|volume=46|issue=18|doi=10.5252/geodiversitas2024v46a18|issn=1280-9659|url-access=subscription}}
  • Lochriea mononodosa
  • Lochriea multinodosa
  • Lochriea nodosa
  • Lochriea saharae
  • Lochriea scotiaensis
  • Lochriea senkenbergica
  • Lochriea ziegleri

| subdivision_ref = {{cn|date=February 2025}}

}}

Lochriea is an extinct genus of conodonts.

Use in stratigraphy

The Visean, the second age of the Mississippian, contains four conodont biozones, two of which are named after Lochriea species:

  • the zone of Lochriea nodosa
  • the zone of Gnathodus bilineatus
  • the zone of Lochriea commutata
  • the zone of Pseudognathodus homopunctatus

The Serpukhovian, the third or youngest age of the Mississippian, includes three conodont biozones, one of which is named after Lochriea species:

  • the zone of Gnathodus postbilineatus
  • the zone of Gnathodus bollandensis
  • the zone of Lochriea ziegleri

References

{{Reflist}}