Genus: Sidersaura LERZO, GALLINA, CANALE, OTERO, CARBALLIDO, APESTEGUIA & MAKOVICKY, 2024 (published 2023)
Etymology: Latin, sider, "star," and Greek, saura, "lizard." In allusion to the stellate shpae of the middle to posterior haemal arches.

Species: marae LERZO, GALLINA, CANALE, OTERO, CARBALLIDO, APESTEGUIA & MAKOVICKY, 2024 (published 2023)
Etymology: In honor of Ms. Mara Ripoll in recognition of her work along the years as preparator technician and later as director of the Museo Municipal 'Ernesto Bachmann.'

Holotype: MMCh-PV 70

Locality: 'Barda Atravesada de Las Campanas' locality in the proximity from Villa El Chocon, Neuquen Province, Patagaonia, Argentina.

Horizon: Huincul Formation.

Biostratigraphy:

Age: Upper Cenomanian-Early Turonian Stage, Late Gallic Subepoch, Early Gulf Epoch, Middle Cretaceous.

Material: Braincase with fused skull roof and neurocranium lateral wall, middle- to posterior dorsal neural spine, fragment of middle to posterior dorsal neural arch, 14 caudal vertebrae, 5 haemal arches, a fragment of left scapula, pubic peduncle, both tibiae, both distal fibulae, both metatarsals I, proximal left metatarsal II and III, distal right metatarsal II, III, IV, and left distal metatarsal V, both phalanges I-1, both phalanges I-2, right phalange I-3, and left ungual phalanages 1 and 3.

Paratypes:

MMCh Pv 236: Sacral or caudal vertebra?, middle to posterior dorsal rib, metatacarpal IV and metacarpal V, a fragment of the acetabular region of the ilium, both ischia, a left pubis and a fragment of the right pubis, the left femur and left fibula, 3 sacral neural arches, 8 caudal vertebrae, right femur, left tibia, right fibula and right metatarsal IV?

MMCh PV 307: Proximal left fibula.

MMCh PV 309: Dorsal centra.