Plagiochasma (echinoderm)
Plagiochasma is an extinct echinoderm genus in the family Pygaulidae.
Species includes:
- Plagiochasma cruciferum ; Paleocene of Denmark, Belgium, The Netherlands, Trinidad and the United States
- Plagiochasma faringdonense ; Lower Greensand, Upper Aptian, Early Cretaceous of UK
- Plagiochasma olfersii ; Hauterivian, Early Cretaceous of France and Switzerland
- Plagiochasma saurai Forner i Valls, 2016; Barremian, Early Cretaceous of Spain
- Plagiochasma texanum Smith & Rader, 2009; Lower Albian, Texas, USA