Abatus is a genus of sea urchins belonging to the family Schizasteridae.

The species of this genus are found in Antarctica and southernmost America.

Species:

• Abatus agassizii Pfeffer, 1889
• Abatus beatriceae (Larrain, 1986)
• Abatus cavernosus (Philippi, 1845)
• Abatus cordatus (Verrill, 1876)
• Abatus curvidens Mortensen, 1936
• Abatus ingens Koehler, 1926
• Abatus kieri McKinney, McNamara & Wiedman, 1988
• Abatus koehleri (Thiéry, 1909)
• Abatus nimrodi (Koehler, 1911)
• Abatus philippii Lovén, 1871
• Abatus shackletoni Koehler, 1911

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