[ref. ID; 2013]
Body shape ovoid to spherical, uniformly ciliated all over body except that in some species there may be a caudal tuft of longer cilia. There is a circular apical oral aperture which leads to a tubular or conical cytopharynx which is usually supported by a delicate basket of trichites. The oral aperture is a simple invagination and is flush with the apical surface, there is no apical collar-like process. Trichocysts often present all over body below the pellicle. Macronucleus ovoid. Contractile vacuole terminal. Feeds on other protozoa.
Quote; Colin R. Curds "British and other freshwater ciliated protozoa Part I Ciliophora: Kinetofragminophora" Cambridge University Press, 1982 (ref. ID; 2013)

• Holophrya aklitolophon (ref. ID; 4611)
• Holophrya alveolata Kahl, 1926 (ref. ID; 1619, 3540) reported year? (ref. ID; 3771)
• Holophrya annandalei Ghosh, 1919 (ref. ID; 1619, 3540)
• Holophrya atra Svec, 1897 (ref. ID; 1619, 3115, 3540)
  See; Prorodon ovum (ref. ID; 4813)
• Holophrya barbatula Penard, 1922 (ref. ID; 1619, 3540)
• Holophrya bengalensis Ghosh, 1919 (ref. ID; 1619, 3540)
• Holophrya biconica Sauerbrey, 1928 (ref. ID; 3540) reported author and year? (ref. ID; 1619)
• Holophrya bimacronucleata (ref. ID; 1620)
• Holophrya butschlii Burger, 1906
  See; Ophryoglena atra (ref. ID; 1622)
• Holophrya carchesii Canella (ref. ID; 2570 original paper) reported author and year? (ref. ID; 3292)
• Holophrya coronata Morgan (ref. ID; 2117)
• Holophrya discolor Ehrenberg, 1833 (ref. ID; 4488, 4611)
  See; Prorodon ovum (ref. ID; 4813), Description of Prorodon viridis (ref. ID; 4881)
• Holophrya gargamellae Faure-Fremiet, 1924
  See; Bursellopsis nigricans (Lauterborn, 1894) (ref. ID; 4613)
• Holophrya gracilis Penard, 1922 (ref. ID; 1619, 3540, 4488)
  Syn; Urotricha hyalina Smith?, 1897 (ref. ID; 1619)
• Holophrya haplostoma Andre, 1916 (ref. ID; 1619, 3540)
• Holophrya hexatricha Savi, 1913 (ref. ID; 1619, 3540)
• Holophrya indica Bathia, 1916 (ref. ID; 1619, 3540)
• Holophrya kessleri Faure-Fremiet, 1924
  See; Enchelys pellucida Eberhard, 1862 (ref. ID; 1619, 3540)
• Holophrya kessleri Mereschkowsky, 1878 (ref. ID; 1619, 3540)
• Holophrya lateralis Kent, 1881 (ref. ID; 1619, 3540)
• Holophrya marina Mansfeld, 1923 (ref. ID; 1619, 3540)
• Holophrya mobilis Wang & Nie, 1933
  See; Bursellopsis nigricans mobilis (ref. ID; 4613)
• Holophrya nigricans Lauterborn, 1894 (ref. ID; 4613), 1906 (ref. ID; 3115) or 1908 (ref. ID; 1219, 1619, 3540)
  See; Bursellopsis nigricans (Lauterborn, 1894) (ref. ID; 4613)
• Holophrya oblonga Maupas (ref. ID; 1335, 2117, 3690)
• Holophrya ornata Stokes, 1887 (ref. ID; 1619, 3540)
• Holophrya ovum Ehrenberg, 1831 (ref. ID; 3115, 4611, 4813, 4881) reported author and year? (ref. ID; 1629)
  See; Prorodon ovum (ref. ID; 3115, 4813), Description of Prorodon viridis (ref. ID; 4881)
  Syn; Porodon viridis Kahl, 1927 (ref. ID; 4611)
• Holophrya pelagica Lohmann, 1920 (ref. ID; 1619, 3540)
• Holophrya perlucida Gajevskaja, 1927 (ref. ID; 1619, 3540)
• Holophrya pharyngeata (ref. ID; 1620)
• Holophrya pogonias Smith, 1897 (ref. ID; 1619, 3540)
• Holophrya saginata Penard, 1922 (ref. ID; 1619, 3540, 3593) reported year? (ref. ID; 3698)
• Holophrya simplex Schewiakoff, 1893 (ref. ID; 1619, 3115, 3540) reported year? (ref. ID; 1618)
• Holophrya spirogyrophaga Leipe, 1989 (ref. ID; 4488, 4611)
• Holophrya sulcata Penard, 1922 (ref. ID; 1619, 3540)
• Holophrya teres (Ehrenberg, 1833) (ref. ID; 4611) or (Ehrenberg, 1833) Foissner et al., 1994 (ref. ID; 4488) reported author and year? (ref. ID; 1629)
  Syn; Prorodon teres Ehrenberg, 1833 (ref. ID; 4611)
• Holophrya truncata Kahl, 1927
  See; Bursellopsis truncata (ref. ID; 4613)
• Holophrya vesiculosa Kahl, 1926 (ref. ID; 1619, 3540)
• Holophrya vorax Dragesco, 1960 (ref. ID; 3690 original paper)

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• Balanophrya collaris Kahl, 1926 (ref. ID; 3540)
• Balanophrya helenae Andre, 1915 (ref. ID; 3540)
• Balanophrya mamillata Kahl, 1927 (ref. ID; 3540)