Periodo Albiense
Sulcirhynchia hythensis (Owen) L. 14 mm.

Leighton Buzzard, Bedfordshire. England.

Sulcirhynchia hythensis (Owen) L. 09 mm.

Leighton Buzzard, Bedfordshire. England.

Sulcirhynchia hythensis (Owen) L. 12 mm.

Leighton Buzzard, Bedfordshire. England.

Capillithyris capillata (Archiac 1847) L. 20 mm.

Leighton Buzzard, Bedfordshire. England

Capillithyris capillata (Archiac 1847) L.18 mm.

Leighton Buzzard, Bedfordshire. England

Kingena wacoensis (Roemer) L. 17 mm.

Georgetown Fm. San Marcos, Texas. USA

Periodos