Genus: Kaykay GOUIRIC-CAVALLI & ARRATIA, 2022
Etymology: The name of the genus referes to the legend of kaykay filu of the native Mapuche population of Argentina Patagonia.
Species: lafken GOUIRIC-CAVALLI & ARRATIA, 2022
Etymology: The species name, lafken, is the owrkd for the 'sea' for a native Mapuche aboriginal population of Argentinian Patagonia.
Holotype: MOZ-PV 1160a, b
Locality: El Ministerio Quarry, Los Catutos Area, 38°47'40"S, 70°10'05"W, Zapala Departiment, Neuquen Province, Argentina.
Horizon: Vaca Muerta Formation.
Biostratigraphy: Virgatosphinctes andensensis biozone.
Age: Lower Tithonian Stage, Malm Epoch, Late Jurassic.
Material: An incom;elte specimen representing by the skull, pectoral girdle and pectoral fin, and an incomplete vertebral column represented by at least 33 abdominal dorsal adn ventral acrocentra adn thier neural and haemal spines.
Paratypes:
MOZ-PV 0043: An cincomplete specmen represented by abdominal and caudal regions of the vertebral column, incomplete pelvic" fins, and anal fin and caudal fin, as well as stomach contentes that are partially preserved vertebral elements of a teleostean.
MOZ-PV 0281: An incomplete specimen reprsented by teh caudal vertebral column, teh caudal fin adn scales.
MOZ-PV 1167a, b: A disarticulated skull, scales adn ribs preserved in a slab.
MOZ-PV 1767: A complete skull roof, pectoral fins, scales and isoalted bones preserved in a slab.
MOZ-PV 2612: An aolmost complete specimen represented by the skull, abdominal and caudal vertebral column, poorly preserved proximal radials of the dorsal fin, and a few supraneurals.
MOZ-PV 2071: A disarticulated skull represented by teh rostrodermethmoid with two anterior fangs, maxilla, premaxilla and dentosplenial with dentition.
MOZ-PV 3081a: An almost complete, three-dimensionally preserved head.
MOZ-PV 3081b: A complee, three-dimensionally preserved head.
MOZ-PV 4077: A disarticulated, incomplete head preserved in a slab.
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