Table 1. Measurements of Actinopluma mirifica Galea gen. et sp. nov., in µm.

	MNHN-IK-2015-612
Caulus
- distance between 2 successive cladial apophyses	400–470
- diameter	95–100
Main cladia
- distance between 2 successive hydrothecae	600–755
- diameter	45–65
Accessory cladia
- diameter	35–40
Hydrotheca
- abaxial wall, length	40–50
- adaxial wall, length	30–35
- base, width	35–40
- diameter at rim	45–50
Nematothecae
- length	70–75
- diameter at rim	25–30
- mamelon, diameter at aperture	ca 20