- Alethopteris goeppertii
- Alethopteris grandini
- Alethopteris lindleyana
- Alethopteris phegopteroides
- Alethopteris sp
- Alethopteris sp.A
- Aleti
- Aletopollenites dubius
- Aletopollenites magnus
- Aletopollenites polyformosus
- Aletopteris kaipingiana
- Aleurichitina
- Aleurichitina erinacea
- Aleurichitina erincea
- Aleurichitina holosphaerica
- Aleurichitina juglandiformis
- Aleurichitina sp
- Aleuritopteris sp
- Alexandra
- Alexandra lehmanni
- Alexandra sp
- Alexandriapollis
- Alexandriapollis multiporatus
- Alexandriapollis paraspinosus
- Alexandrium
- Alexandrium affine
- Alexandrium andersonii
- Alexandrium catenella
- Alexandrium cohorticula
- Alexandrium compressum
- Alexandrium concave
- Alexandrium concavum
- Alexandrium excavatum
- Alexandrium fundyense
- Alexandrium hiranoi
- Alexandrium leei
- Alexandrium lusitanicum
- Alexandrium margalefii
- Alexandrium minutum
- Alexandrium monilatum
- Alexandrium ostenfeldii
- Alexandrium peruvianum
- Alexandrium pseudogoniaulax
- Alexandrium pseudogonyaulax
- Alexandrium sp