Misikella

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

{{Automatic taxobox

| taxon = Misikella

| fossil_range = {{fossil range|Norian|Hettangian}}

| authority = Kozur and Mock 1974Misikella posthernsteini n. sp., die jüngste Conodontenart der tethyalen Trias. H Kozur, R Mock, Cí asopis Min. Geol. Roc, 1974

| subdivision_ranks = Species

| subdivision =

• †Misikella buseri?
• †Misikella hernsteini
• †Misikella koessenensis
• †Misikella kolarae
• †Misikella kovacsi
• †Misikella lanceolata
• †Misikella longidentata (type)?
• †Misikella posthernsteini (type)
• †Misikella rhaetica
• †Misikella ultima

| synonyms =

}}

Misikella is an extinct genus of conodonts.{{Cite journal|last1=Karádi|first1=Viktor|last2=Cau|first2=Andrea|last3=Mazza|first3=Michele|last4=Rigo|first4=Manuel|date=2019-04-02|title=The last phase of conodont evolution during the Late Triassic: Integrating biostratigraphic and phylogenetic approaches|url=http://www.sciencedirect.com/science/article/pii/S0031018218301767|journal=Palaeogeography, Palaeoclimatology, Palaeoecology|volume=549|page=109144|language=en|doi=10.1016/j.palaeo.2019.03.045|s2cid=134898058|issn=0031-0182}}

Two species were named as type species for the genus in separate publications by the same authors in the same year (1974). The first paper named Misikella longidentata, while the second named Misikella posthernsteini. Most species assigned to Misikella have a Norian-Rhaetian distribution and a bimembrate conodont apparatus, including M. posthernsteini. On the other hand, M. longidentata has a Carnian-Norian distribution and a tetramembrate apparatus. Fåhræus & Ryley (1989) retained the name Misikella for only M. longidentata, placing the rest of the species into the new genus Axiothea.{{Cite journal|last1=Fåhræus|first1=Lars. E.|last2=Ryley|first2=C. Christopher|date=1989-06-01|title=Multielement species of Misikella Kozur and Mock, 1974 and Axiothea n.gen. (Conodonta) from the Mamonia Complex (Upper Triassic), Cyprus|url=https://www.nrcresearchpress.com/doi/abs/10.1139/e89-106|journal=Canadian Journal of Earth Sciences|volume=26|issue=6|pages=1255–1263|doi=10.1139/e89-106|bibcode=1989CaJES..26.1255F|issn=0008-4077}} However, other conodont specialists utilize the name Misikella primarily in the context of M. posthernsteini and other bimembrate species, rather than M. longidentata. Uniquely, M. posthernsteini is known from the Hettangian of Japan,{{cite journal |last1=Du |first1=Yixing |last2=Onoue |first2=Tetsuji |last3=Tomimatsu |first3=Yuki |last4=Wu |first4=Qiangwang |last5=Rigo |first5=Manuel |title=Lower Jurassic conodonts from the Inuyama area of Japan: implications for conodont extinction |journal=Frontiers in Ecology and Evolution |date=2023 |volume=11 |doi=10.3389/fevo.2023.1135789 |issn=2296-701X |doi-access=free |hdl=11577/3479836 |hdl-access=free }} suggesting that conodonts underwent extinction debt and then were outcompeted by other organisms.