[ref. ID; 1618]
Spicules of various forms. (ref. ID; 1618)

[ref. ID; 4884]
Emended diagnosis; Centrohelid heliozoa with the periplast comprising three types of scales: straight tubular or trumpet-like scales, smaller funnel-shaped scales, and elliptical or subrectangular plate-scales. Plate-scales have a conspicuously broad peripheral rim, an either smooth or patterned central area and a well-developed or vestigial median rim. Some remarks must be done about the type-species of Raphidocystis - R. lemani Penard. This species was described by Penard (1902) as lacking plate-scales in the periplast. However, there are not known acanthocystids of raphidiophryids lacking plate scales. Some specimens of R. lemani were observed by the author on the Kuybishev water reserve (central Russia). They have very few plate scales with reticulate surface similar to R. tubifera. We consider Penard did not observe its plate-scales because they are very few. (ref. ID; 4884)

• Raphidocystis glutinosa Penard, 1904 (ref. ID; 3541, 3691 original paper)
• Raphidocystis infestans Wetzel, 1925 (ref. ID; 1618)
• Raphidocystis lemani Penard, 1891 (ref. ID; 3541, 3691)
  Syn; Acanthocystis lemani Penard, 1891 (ref. ID; 3541) reported year? (ref. ID; 3691); Acanthocystis lemani var. plonensis Zacharias, 1894 (ref. ID; 3541) reported year? (ref. ID; 3691); Heterophrys pavesii Garbini, 1898 (ref. ID; 3541) reported year? (ref. ID; 3691); Raphidocystis lemani Penard, 1904 (ref. ID; 3541)
• Raphidocystis lepidula (Penard, 1904) Rainer, 1968 (ref. ID; 3541 redescribed paper)
  Syn; Choanocystis lepidula Penard, 1904 (ref. ID; 3541)
• Raphidocystis simplex (Schaudinn, 1897) (ref. ID; 3691) or 1898 (ref. ID; 3541)
  Syn; Acanthocystis simplex Schaudinn, 1898 (ref. ID; 3541) reported year? (ref. ID; 3691); Raphidocystis simplex Penard, 1904 (ref. ID; 3541)
• Raphidocystis stellata Penard, 1904 (ref. ID; 3541, 3691 original paper)
• Raphidocystis tubifera Penard, 1904 (ref. ID; 3541, 3691 original paper, 4710) reported year? (ref. ID; 1618, 4878)