Literature
- Meisenheimer, J. 1905c. Pteropoda. Deutsch. Tiefsee Exp. 1898-1899 IX: 1-314, Atlas Pl. 1-27 Map 1-9.
- Munthe, H. 1888. Pteropoder i Upsala Universitets Zoologiska Museum samlade af Kapten G. von Schéele. K. Svenska Vet.-Akad. Handlingar 14 (4) 2 (Bihang): 1-33, 21 figs.
- Newman, L. J. 1990. Holoplanktonic molluscs (Gastropoda; Thecosomata, Gymnosomata, and Heteropoda) from the waters of Australia and Papua New Guinea: their taxonomy, distribution and biology. PhD Thesis Univ. Qld. Australia. 208 pp.
- Newman, L. and Greenwood, J. G. 1987. First records of the pteropods Clio scheelei (Munthe, 1888) and Clio andreae (Boas, 1886) (Opisthobranchia: Thecosomata) from the western Pacific Ocean. Veliger 30(1): 90-94.
- Spoel, S. van der 1967. Euthecosomata, a group with remarkable developmental stages (Gastropoda, Pteropoda). J. Noorduyn and Zn, Gorinchem, 375 pp.
Summary (in Dutch also published separately). - Spoel, S. van der 1976c. Pseudothecosomata, Gymnosomata and Heteropoda. Bohn, Scheltema & Holkema, Utrecht. 484 pp. 246 figs.
- Starobogatov, J. I. 1971. Ordo Thecosomata; ordo Gymnosomata; ordo Heteropoda. In: Polevoy Zool. Inst. Akad. Moscou. opredeliteli planktona (without page or figure numbers, not bound, mimiographed). [in Russsian].
- Tesch, J. J. 1913c. Mollusca, Pteropoda. In: F. E. Schulze. Das Tierreich. Eine Zusammenstellung und Kennzeichnung der rezenten Tierformen 36. Berlin (Friedberger and Sohn): i-xvi, 1-154, 108 figs.