New name for the Jurassic dinoflagellate cyst species Gonyaulacysta longicornis (Deflandre 1938) Riding et al. 2022

One of the taxonomic actions in a recent review of the Jurassic dinoflagellate cyst genus Gonyaulacysta was the elevation of the subspecies Gonyaulacysta jurassica subsp. longicornis Deflandre 1938 to species rank, as Gonyaulacysta longicornis (Deflandre 1938) Riding et al. 2022. In doing so, the authors of this review inadvertently created an illegitimate junior homonym of Gonyaulacysta longicornis (Downie 1956) Sarjeant 1969. To remedy this situation, we propose the new name Gonyaulacysta nasuta as a substitute for Gonyaulacysta longicornis (Deflandre 1938) Riding et al. 2022, thus preserving the integrity of this important index taxon for the late Callovian to middle Oxfordian (Middle–Late Jurassic) of the Northern Hemisphere.