Genus: Hauffiosaurus O’KEEFE, 2001
Etymology: In honor of Urwelt-Museum Hauff, the institution in Holzmaden, Germny, where the type specimen is housed, and Greek, sauros, "lizard."

Species: longirostris (BLAKE, in TATE & BLAKE, 1876) BENSON, KETCHUM, NOE & GOMEZ-PEREZ, 2011
= Macroplata longirostris (BLAKE, in TATE & BLAKE, 1876) WHITE, 1940
Etymology: Latin, longi, "long" and Latin, rostris, "snout."
= Plesiosaurus longirostris BLAKE, in TATE & BLAKE, 1876
= Genus: Nova NOE, 2007 (as per SATO & WU, 2008)

Holotype: MCZ 1033

Locality: Saltwick, Whitby, Yorkshire County, England, Southern United Kingdom.

Horizon:

Biostratigraphy: Harpocerras falciferum zone.

Age: Lower Toarcian Stage, Upper Lias Epoch, Late Early Jurassic.

Material: Fragmentary skull and fragmentary skeleton.

Referred material:

BENTON & TAYLOR, 1983

Locality: Ravenscar, Yorkshire County, England, Southern United Kingdom.

Horizon:

Biostratigraphy:

Age: Lias Epoch, Early Jurassic.

Material:

MU unnumbered:

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Species: zanoni O’KEEFE, 2001
Etymology: In honor of the late R. T. Zanon, who first realized this specimen represtended a new genus (R. T. Zanon unpublished).

Holotyep: Hauff Museum uncatalogued.

Locality: Holzmaden, Baden-Wurttemberg State, Southern Germany.

Horizon: Posidonienschiefer.

Biostratigraphy:

Age: Lower Toarcian Stage, Upper Lias Epoch, Late Early Jurassic.

Material: Complete skull and skeleton.

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Species: tomistomimus BENSON, KETCHUM, NOE & GOMEZ-PEREZ, 2011
Etymology: From Tomistoma, the generic name of the false gharial, a long-snouted crocodilian, and Greek, mimus, "mimic."
= Rhomaleosaurus longirostris BLAKE in TATE & BLAKE; HALSTEAD in BROADHURST & DUFFY, 1970
= Macroplata longirostris (BLAKE in TATE & BLAKE) CRUICKSHANK, 1996

Holotype: MANCH LL 8004

Locality: The bay betwen Old Peak and Blea Wyke Point, south-east of Robin Hood's Bay, Yorkshire County, England, Southern United Kingdom.

Horizon: Alum Shale Member, Whitby Mudstone Formation.

Biostratigraphy: Hildoceras bifrons zone.

Age: Lower Toarcian Stage, Upper Lias Epoch, Late Early Jurassic.

Material: Nearly complete skull and nearly complete skeleton.