iridia iridia iridia is a genus of foraminifera belonging to the subfamily tholosininae. it contains four species. the first species, i. diaphana, was discovered in the querimba archipelago by scientists edward heron-allen and arthur earland, who first described the genus in 1914. iridia iridia diaphana scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: retaria subphylum: ectoreta infraphylum: foraminifera class: monothalamea order: astrorhizida suborder: saccamminina superfamily: saccamminoidea family: saccamminidae subfamily: tholosininae genus: iridiaheron-allen & earland (1914) type species iridia diaphanaheron-allen & earland (1914) species i. convexa i. diaphana i. lucida i. serialis