Species: northamptoni MANTELL, 1848 (nomen dubium)
Etymology:
= Hylaeosaurus northamptoni (MANTELL, 1848) OWEN, 1858 (nomen dubium)

In 1848 Mantell named it Regnosaurus northamptoni, though did keep it in the Iguanodontidae. Owen (1858) renamed it Hylaeosaurus northamptoni. Lydekker (1888a) suggested it was a junior synonym of Vectisaurus valdensis Hulke (1879) and placed it in the Scelidosauridae. Lydekker (1888b) placed it in the family Scelidosauridae with Scelidosaurus, Acanthopholis, Polacanthus and Hylaeosaurus. Ostrom (1970) placed it in sauropoda and similar to Astrodon or “Pleurocoelus’ based on shape of the roots. Coombs (1971)  referred it to the Ankylosauria. McIntosh (1990) suggested it was a junior synony of the camarasaurid Chondrosteosaurus. Olshevsky & Ford (1993) were the first to refer Regnosaurus to the stegosauria, Dacentruridae specifically. Barrett & Upchurch (1995) redescribed the jaw fragment and regarded it as a sister taxon to Huayangosaurus.

Holotype: NHMUK (old BMNH) 2422

Locality: Tilgate Forest, in a quarry north of Cuckfield, West Sussex County, England, Southern United Kingdom.

Horizon: Wealden Formation.

Biostratigraphy:

Age: Valanginian Stage, Middle Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material: Fragmentary right dentary showing dental alveoli and the bases of the teeth.

Referred material:

GALTON, 1983

Locality: Point 74 (Geological Map of Portugal 1:50,000) between Porto de Barcas and Porto Pinheiro near Lourinha, Estremadura Province, Portugal.

Horizon:

Biostratigraphy:

Age: Lower Berriasian Stage, Lower Neocomian Subepoch, Lowermost Early Cretaceous Epoch, Early Cretaceous.
Note: Originally thought to be Upper Tithonian Stage, Upper Malm Epoch, Late Jurassic.

Material:

Top FUB A, Bottom FUB C.

FUB A: Found with a well preserved right stocky dermal spine.

Note: Tentatively referred to Regnosaurus (OLSHEVSKY, 1996)

FUB B: Proximal part of a right dorsal rib with the tubereculum but lacking the capitulum.

FUB C: Dermal plate found with a well preserved right stocky dermal spine (Referred to Dacentrurus armatus GALTON, 1991)

Note: First referred to Dracopelta sp, then in Galton, 1994 refers these specimens tentatively referred to Craterosaurus, and tentatively referred to Regnosaurus (OLSHEVSKY, 1996)

 

= generically undetermined specimen LYDEKKER, 1888

Locality: Potton, Bedfordshire County, England, Southern United Kingdom.

Horizon:

Biostratigraphy:

Age: Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material:

NHMUK (old BMNH) 40458: A water-worn dermal spine.

Note: Tentatively referred to Regnosaurus (OLSHEVSKY, 1996)

 

= generically undetermined specimen LYDEKKER, 1888

Locality: Southwest coast of Isle of Wight, near Barnes High, Isle of Wight County, England, Southern United Kingdom.

Horizon: Upper Wealden Formation.

Biostratigraphy:

Age: Upper Barremian Stage, Lower Neocomian Subepoch, Lowermost Early Cretaceous Epoch, Early Cretaceous.

Material:

NHMUK (old BMNH) 39533: Dermal spine.

Note: Tentatively referred to Regnosaurus (OLSHEVSKY, 1996)