Hyalosphenia papilio

Super Group: 
Eukaryota
Phylum: 
Amoebozoa
Class: 
Tubulinea
Order: 
Arcellinida
Family: 
Hyalospheniidae
Genus: 
Hyalosphenia
Species: 
papilio
Authority: 
Leidy, 1874

Diagnosis

Test is wide pyriform or oblong-ovoid, laterally compressed, with convex fundus, with the lateral sides gradually tapering toward aperture. In the profile the test is elliptic, with the slightly elongated rounded fundus, and with the concave aperture. Test is transparent, often with buff or yellowish tint, with various number of pores (1-10) situated on the lateral margin. L=90-175, B=60-155 μm. Aperture is slightly curved or linear, sometimes with tiny collar, with 30-40 μm wide. 

Observation site(s)