Planhoogenraadia

 

P. gracilis - from Bonnet, 1977

 

 

Genus Planhoogenraadia Bonnet, 1977

 

Diagnosis: Test bilaterally symmetrical; aperture more or less covered by a visor-like extension of the dorsal surface, 2 lateral grooves at the junction of visor and belly. In contrast to Hoogenraadia ventral side always flat; this is interpreted as an adaptation to the living in soil as in Plagiopyxis or certain Centropyxis. Pseudostome usually semi-circular or elongated oval, located back into the test.

Type species: Planhoogenraadia acuta Bonnet, 1977.

Eight species.

 

Ecology: forest soils often on calcareous bedrock.

 

Hoogenraadia distribution
Distribution of Hoogenraadia (red), Planhoogenraadia (yellow) and Geoplagiopyxis (green) - modified after Smith et al. 2008.

 

 

Planhoogenraadia
P. alta - from Bonnet, 1984

 

Planhoogenraadia
P. acuta - from Bonnet, 1977

 

Planhoogenraadia
P. bonneti

 

Planhoogenraadia
P. cantabrica - from Bonnet, 1984

 

Planhoogenraadia
P. asturica - from Bonnet, 1984

 

Planhoogenraadia
P. gibbosa - from Bonnet, 1984

 

Planhoogenraadia
P. elegans

 

Planhoogenraadia
P. daurica - from Bobrov, 2001

 

Planhoogenraadia
P. gracilis - from Bonnet, 1984