Spiniferites subgenus Hafniasphaera

"SPINIFERITES subgenus HAFNIASPHAERA" (Hansen, 1977, p.13-14) Quattrocchio and Sarjeant, 2003, p.140.  NOW Hafniasphaera.  Originally (and now) Hafniasphaera, subsequently Spiniferites subgenus Hafniasphaera, We here retain Hafniasphaera as a genus on the basis of its distinctive morphology.  Taxonomic senior synonym: Spiniferites, according to Stover and Williams (1987, p.117) - however, Edwards (1996, p.989) retained Hafniasphaera.  Taxonomic junior synonym: Rivernookia, according to Lentin and Williams (1985, p.311).  Quattrocchio and Sarjeant assigned the following species to this subgenus: Spiniferites cryptovesiculata, Spiniferites fluens, Spiniferites goodmanii, Spiniferites graciosus, Spiniferites hyalospinosa and Spiniferites septatus.  Type: Hansen, 1977, fig.18A, as Hafniasphaera hyalospinosa.