Jahnula

{{Short description|Genus of fungi}}

{{Taxobox

| image = Jahnula purpurea (10.3897-mycokeys.9.4440) Figure 1.jpg

| image_caption = J. purpurea

| regnum = Fungi

| divisio = Ascomycota

| classis = Dothideomycetes

| ordo = Jahnulales

| familia = Aliquandostipitaceae

| genus = Jahnula

| genus_authority = Kirschst. (1936)

| type_species = Jahnula aquatica

| type_species_authority = (Plöttn. & Kirschst.) Kirschst. (1936)

| subdivision_ranks = Species

| subdivision =

}}

Jahnula is a genus of aquatic fungi in the family Aliquandostipitaceae.{{cite journal|last=Lumbsch TH, Huhndorf SM. |date=December 2007 |title=Outline of Ascomycota – 2007 |journal=Myconet |volume=13 |pages=1–58 |url=http://archive.fieldmuseum.org/myconet/outline.asp |publisher=The Field Museum, Department of Botany |location=Chicago, USA |url-status=dead |archiveurl=https://web.archive.org/web/20090318003134/http://www.fieldmuseum.org/myconet/outline.asp |archivedate=2009-03-18 }} The genus was first named by Wilhelm Kirschstein in 1936.{{cite journal |author=Kirschstein W. |year=1936 |title=Beiträge zur Kenntnis der Ascomyceten und ihrer Nebenformen besonders aus der Mark Brandenburg und dem Bayerischen Walde |journal=Annales Mycologici |volume=34 |pages=180–210|language=German}}

The genus name of Jahnula is in honour of Eduard Adolf Wilhelm Jahn (1871–1942), German botanist (Mycology) and teacher in Berlin.{{cite book | last=Burkhardt | first=Lotte | title=Eine Enzyklopädie zu eponymischen Pflanzennamen |trans-title=Encyclopedia of eponymic plant names | publisher=Botanic Garden and Botanical Museum, Freie Universität Berlin | year=2022 | isbn=978-3-946292-41-8 | url=https://doi.org/10.3372/epolist2022|format=pdf |language=German |location=Berlin | doi=10.3372/epolist2022 |access-date=January 27, 2022}}

The genus was circumscribed by Wilhelm Kirschstein in Ann. Mycol. vol.34 on page 196 in 1936.