{{Speciesbox | taxon = Aulostomus medius | authority = Weiler, 1920 | fossil_range = {{fossil range|34|30|Early Oligocene}} | extinct = yes }}'''''Aulostomus medius''''' is an extinct species of prehistoric trumpetfish known from the Early Oligocene of western Europe, which was covered by the Paratethys at the time. Fossil specimens are known from the Frauenweiler clay pit<ref name=":2">{{Cite journal |last=Parin |first=N. N. |last2=Micklich |first2=Norbert |date=1996 |title=Two aulostomoid fishes (Aulostomidae, Syngnathiformes) from the Lower Oligocene of Germany |url=https://www.researchgate.net/publication/289116271_Two_aulostomoid_fishes_Aulostomidae_Syngnathiformes_from_the_Lower_Oligocene_of_Germany |journal=Палеонтологический журнал |volume=30 |issue=1}}</ref> of Germany and the Froidefontaine Formation of France.<ref>{{Cite journal |last=Pharisat |first=Andre |date=1998-01-01 |title=Marine fish biodiversity in the Oligocene of Froidefontaine (Belfort Territory, France) |url=https://doi.org/10.1080/11250009809386811 |journal=Italian Journal of Zoology |volume=65 |issue=sup1 |pages=189–191 |doi=10.1080/11250009809386811 |issn=1125-0003|url-access=subscription }}</ref> In the former locality, it is known to have coexisted with the related aulostomid †''Frauenweilerostomus''.<ref name=":2" /><ref>{{Cite journal |last1=Micklich |first1=N. |last2=Parin |first2=N. |date=1995 |title=The fishfauna of Frauenweiler (Middle Oligocene, Rupelian; Germany): First results of a review |url=https://www.researchgate.net/publication/309050347 |journal=Publ. Espec. Inst. Esp. Oceanogr. |volume=21 |pages=129–148}}</ref>
It is known from well-preserved specimens, showing that its body was covered in rows of rectangular, evenly-sized scales ordered in rows.<ref>{{Cite web |last=México~kleytonbio@yahoo.com.br |first=Kleyton Magno Cantalice~Universidad Nacional Autónoma de |last2=México~alvarado@geologia.unam.mx |first2=Jesús Alvarado-Ortega~Universidad Nacional Autónoma de |date=2016-12-12 |title=Eekaulostomus cuevasae gen. and sp. nov., an ancient armored trumpetfish (Aulostomoidea) from Danian (Paleocene) marine deposits of Belisario Domínguez, Chiapas, southeastern Mexico |url=https://palaeo-electronica.org/content/2016/1659-ancientarmored-trumpetfish |access-date=2025-10-07 |website=Palaeontologia Electronica |language=en}}</ref>
== References == {{Reflist}}
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† Category:Rupelian life Category:Oligocene fish of Europe Category:Fossils of Germany Category:Fossils of France Category:Fossil taxa described in 1920 Category:Prehistoric ray-finned fish