1. Species Colella claviformis Herdman, 1899 accepted as Euclavella claviformis (Herdman, 1899) (original combination)
2. Species Colella concreta Herdman, 1886 accepted as Distaplia concreta (Herdman, 1886) (original combination)
3. Species Colella cyanea Herdman, 1899 accepted as Sigillina cyanea (Herdman, 1899) (original combination)
4. Species Colella cyanea Herdman, 1898 accepted as Sigillina cyanea (Herdman, 1899) (unaccepted > nomen nudum)
5. Species Colella elongata Herdman, 1886 accepted as Eudistoma elongatum (Herdman, 1886) (original combination)
6. Species Colella gaimardi Herdman, 1886 accepted as Sycozoa gaimardi (Herdman, 1886) (original combination)
7. Species Colella georgiana Michaelsen, 1907 accepted as Sycozoa georgiana (Michaelsen, 1907) (original combination)
8. Species Colella incerta Caullery, 1909 accepted as Sycozoa cerebriformis (Quoy & Gaimard, 1834) (original combination)
9. Species Colella kanzasi Oka, 1930 accepted as Sycozoa kanzasi (Oka, 1930) (original combination)
10. Species Colella kukenthali Gottschaldt, 1894 accepted as Eudistoma vitreum (Sars, 1851) (original combination)
11. Species Colella moebiusi Hartmeyer, 1905 accepted as Sigillina moebiusi (Hartmeyer, 1905) (original combination)
12. Species Colella murrayi Herdman, 1886 accepted as Sycozoa murrayi (Herdman, 1886) (original combination)
13. Species Colella pedunculata Herdman, 1886 accepted as Sycozoa sigillinoides Lesson, 1830 (original combination)
14. Species Colella perrieri Caullery, 1909 accepted as Sycozoa sigillinoides Lesson, 1830 (original combination)
15. Species Colella plicata Herdman, 1891 accepted as Sycozoa cerebriformis (Quoy & Gaimard, 1834) (original combination)
16. Species Colella pulchra Herdman, 1886 accepted as Sycozoa pulchra (Herdman, 1886) (original combination)
17. Species Colella quoyi Herdman, 1886 accepted as Sycozoa sigillinoides Lesson, 1830 (original combination)
18. Species Colella racovitzai Beneden & Selys-Longchamps, 1913 accepted as Sycozoa gaimardi (Herdman, 1886) (original combination)
19. Species Colella ramulosa Herdman, 1886 accepted as Sycozoa sigillinoides Lesson, 1830 (original combination)
20. Species Colella sigillinoides (Lesson, 1830) accepted as Sycozoa sigillinoides Lesson, 1830 (new combination)
21. Species Colella tenicaudalis Herdman, 1899 accepted as Sycozoa pedunculata (Quoy & Gaimard, 1834) (original combination)
22. Species Colella tenuicaulis Herdman, 1899 accepted as Sycozoa pulchra (Herdman, 1886) (original combination)
23. Species Colella thompsoni Herdman, 1886 accepted as Nephtheis fascicularis (Drasche, 1882) (literature misspelling)
24. Species Colella thomsoni Herdman, 1886 accepted as Nephtheis fascicularis (Drasche, 1882) (original combination)
25. Species Colella umbellata Michaelsen, 1898 accepted as Sycozoa sigillinoides Lesson, 1830 (original combination)

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