Species: tenuirostris OWEN, 1871
Etymology:

Holotype: BMNH 47742

Locality: Durdlestone Bay, Swanage, Dorset County, England, Southern United Kingdom.

Horizon: Purbeckian.

Biostratigraphy:

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

Material: Left ramus, external aspect, posterior part almost complete with crowns of last four teeth and roots of several in front of these.

Referred material:

CLEMENS & MILLS, 1871

BMNH 47759:

NHMUK PV (BMNH) M21888: Right mandible with preserving broken crowns for the p3-p5 and m1-m3.

 

MILLS, 1964

Locality: England, Southern United Kingdom.

Horizon: Purbeckian.

Biostratigraphy:

Age: Tithonian Stage, Upper Malm Epoch, Late Jurassic.

Material:

BMNH 21888, 47742, 47751: Lower jaws with teeth.

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Species: dubius (OWEN, 1871) OSBORN, 1888
= Leptocladius dubius OWEN, 1897
Etymology:
= Peramus (Leptocladus) dubius (OWEN, 1871) OSBORN, 1888

Holotype: BMNH 47739

Locality: Durdlestone Bay, Swanage, Dorset County, England, Southern United Kingdom.

Horizon: Purbeckian.

Biostratigraphy:

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

Material: Left ramus, external aspect, with all the premolars and molars. Mandible with 2 distal, single-rooted incisors represented by the broken root of the more mesial and the alveolus of the distal.

Referred material:

NHMUK PV (BMNH) M21887: Left maxilla with the P1-P5, M1-M2, and portion of M3.

BMNH 48404: Right ramus, internal aspect, preserving roots of the p3 and crowns of the p4-p5 and m1-m3.

 

= Peramus minor OWEN, 1897
Etymology:

Holotype: BMNH 47754

Locality: Durdlestone Bay, Swanage, Dorset County, England, Southern United Kingdom.

Horizon: Purbeckian.

Biostratigraphy:

Age: Tithonian Stage, Upper Malm Epoch, Late Jurassic.

Material: Left ramus, internal aspect, with alveoli for the p1-14 and m2-m3, and broken crowns of p5 and m1.