Genus: Besanosaurus DAL SASSO, & PINNA, 1996
Etymology: From the village of Besano, Varese Province, Lombardy, North Italy and Greek, sauros, “lizard”: Besano lizard.
= Mikadocephalus MAISCH & MATZKE, 1998
Etymology: Mikado, Japanese-literally; the venerable gate; originally honorable name for the Japanese emperor nowadays mainly referring to the well-known Mikado-game and Greek, kephalos, "head." Chose for the resemblance of the scattered and superimposed cranial bones of the holotype skull to a heap of Mikado-sticks.

Species: leptorhynchus DAL SASSO, & PINNA, 1996
Etymology: Greek, leptos, “thin, slender” and Greek, rhynchos, “snout”: Slender snout.

Holotype: Museum of Natural History of Milan, BES SC 999

Locality: Sasso Caldo Quarry, Besano, Varese Province, Lombardy, North Italy.

Horizon: Besano Formation.

Biostratigraphy: Nevadites Zone sensu Brack & Rieber, 1993.

Age: Uppermost Anisian Stage, Lower Mid Triassic Epoch, Middle Triassic.

Material: Complete skull and complete skeleton.

Referred material:

BINDELLINI, WOLNIEWICZ, MIEDERMA, SCHEYER & DAL SASSO, 2021

Locality: Valle Stelle, Switerzland.

Horizon: N. secedensis Zone.

Biostratigraphy:

Age: Anisian-Ladinian boundary, Lower Mid Triassic Epoch, Middle Triassic.

Material:

PIMUZ T 4376: Nearly complete specimen.

 

Locality: Cava Tre Fontane, Switzerland.

Horizon: N. secedensis Zone.

Biostratigraphy:

Age: Anisian-Ladinian boundary, Lower Mid Triassic Epoch, Middle Triassic.

Material:

PIMUZ T 4847, 1895: Nearly complete specimens.

= Mikadocephalus gracilirostris MAISCH & MATZKE, 1998
Etymology: Latin, gracilis, "gracile or slender" and Latin, rostrum, "snout," referring to the exceedingly slender snout region of the animals’ skull.

Holotype: GPIT 1793/1

Locality: Monte San Giorgio, Tessin Canton, Switzerland.

Horizon: Grenzbitumenzone beds.

Biostratigraphy:

Age: Anisian-Ladinian boundary, Lower Mid Triassic Epoch, Middle Triassic.

Material: Nearly complete skull.

= Besanosaurus leptorhyncus BINDELLINI, WOLNIEWICZ, MIEDEMA, DAL SASSO & SCHEYER, 2024

PIMUZ T 4376: Skull and skeleton of a small individual missing the distalost caudals.

PIMUZ T 1895: Incomplete specimen lackign most of the tail, and the limbs, except for the tail bend.