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Valid name
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Codonellopsis orthoceras
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| Synonym | Codonella orthoceras var. g pura Brandt, 1906-1907 |
| Synonym | Codonellopsis longa Kofoid and Campbell, 1929, 1939 |
| Synonym | Codonella orthoceras var. d Brandt, 1906-1907 |
| Synonym | Codonella orthoceras var. k Brandt, 1906-1907 |
| Synonym | Codonellopsis pura Kofoid and Campbell, 1929, 1939 |
| Synonym | Codonellopsis californiensis Kofoid and Campbell, 1929, 1939 |
| Synonym | Codonella orthoceras Haeckel, 1873; Brandt, 1906-1907 |
| Synonym | Codonella orthoceras var. h Brandt, 1906-1907 |
| Synonym | Codonellopsis tessellata Kofoid and Campbell, 1929, 1939 |
| Synonym | Codonella orthoceras var. c Brandt, 1906-1907 |
| Synonym | Codonellopsis pacifica Kofoid and Campbell, 1929, 1939 |
| Synonym | Codonellopsis speciosa Kofoid and Campbell, 1929, 1939 |
| Synonym | Codonella orthoceras var. f minor Brandt, 1906-1907 |
| Synonym | Codonella orthoceras var. i Brandt, 1906-1907 |
| Synonym | Codonellopsis parva Kofoid and Campbell, 1929, 1939 |
| Synonym | Codonella orthoceras var. b Brandt, 1906-1907 |
| Synonym | Codonellopsis minor Kofoid and Campbell, 1929, 1939 |
| Synonym | Codonellopsis meridionalis Kofoid and Campbell, 1929, 1939 |
| Synonym | Codonella orthoceras var. e Brandt, 1906-1907 |
| Synonym | Codonella orthoceras var. l pacifica Brandt, 1906-1907 |
| Synonym | Codonellopsis inflata Kofoid and Campbell, 1929, 1939 |
| Synonym | Codonella orthoceras var. a tessellata Brandt, 1906-1907 |