Collotheca is een geslacht van raderdiertjes uit de familie van de Collothecidae.
Soorten Collotheca algicola (Hudson, 1886) Collotheca ambigua (Hudson, 1883) Collotheca annulata (Hood, 1888) Collotheca atrochoides (Wierzejski, 1893) Collotheca balatonica Varga, 1936 Collotheca bilfingeri Bērzinś, 1951 Collotheca bulbosa Bērzinś, 1951 Collotheca calva (Hudson, 1885) Collotheca campanulata (Dobie, 1849) Collotheca conklini (Montgomery, 1903) Collotheca coronetta (Cubitt, 1869) Collotheca crateriformis Offord, 1934 Collotheca cucullata (Hood, 1894) Collotheca discophora (Skorikov, 1903) Collotheca edentata (Collins, 1872) Collotheca edmondsoni Bērzinś, 1951 Collotheca epizootica (Monard, 1922) Collotheca evansonii (Anderson, 1892) Collotheca ferox (Penard, 1914) Collotheca gosseii (Hood, 1892) Collotheca heptabrachiata (Schoch, 1869) Collotheca hexalobata Banik, 2002 Collotheca hoodii (Hudson, 1883) Collotheca judayi Edmondson, 1940 Collotheca lettevalli Bērzinś, 1976 Collotheca libera (Zacharias, 1894) Collotheca minuta (Milne, 1905) Collotheca monoceros (Zacharias, 1912) Collotheca moselii (Milne, 1905) Collotheca mutabilis (Hudson, 1885) Collotheca ornata (Ehrenberg, 1830) Collotheca paradoxa (Penard, 1914) Collotheca pelagica (Rousselet, 1893) Collotheca polyphemus Harring, 1914 Collotheca quadrilobata (Hood, 1892) Collotheca quadrinodosa Wright, 1961 Collotheca rasmae Bērzinś, 1951 Collotheca sessilis (Milne, 1905) Collotheca spinata (Hood, 1893) Collotheca stephanochaeta Edmondson, 1936 Collotheca tenuilobata (Anderson, 1889) Collotheca tetralobata Banik, 2002 Collotheca thunmarki Bērzinś, 1951 Collotheca torquilobata (Thorpe, 1891) Collotheca trifidlobata (Pittock, 1895) Collotheca trilobata (Collins, 1872) Collotheca tubiformis Nipkow, 1961 Collotheca undulata Sládeček, 1969 Collotheca vargai Nogrady, 1976 Collotheca wiszniewskii Varga, 1938