Salpida
Suggested reading

Apstein C. 1894. Die Thaliacea der Plankton Expedition. Plankton-Exp. Humboldt-Stiftung, Ergebn. 2(E.a.B.):1-68.
Apstein C. 1906. Salpen der deutschen Tiefsee-Expedition. Wiss. Erg. Deutsch. Tiefsee-Exp. Dampfer "Valdivia" 1898-1899, 12:245-290.
Apstein C. 1906. Die Salpen der deutschen Südpolar-Expedition, 1901-1903. Deutsche Südpolar Exp. 1901-1903, 9,(Zool. 1):159-203.
—In this series of reports the author made important contributions to the systematics and distribution of salps; includes clear schematic illustrations.

Brien P. 1948. Embranchement des Tuniciers. In "Traité de Zoologie", 11 (P.P. Grassé, ed.), Masson, Paris, pp. 553-930.
—A classical overview of salp biology and anatomy.

Esnal G.B. 1981. Thaliacea: Salpidae. In "Atlas del Zooplancton del Atlántico Sudoccidental y métodos de trabajo con el zooplancton marino" (D. Boltovskoy, ed.), Public. Esp. Inst. Nac. Inv. Desarrollo Pesq., Mar del Plata, pp. 809-827.
—General review of the systematics and distribution of salps from the southwestern Atlantic Ocean (in Spanish).

Foxton P. 1961. Salpa fusiformis Cuvier and related species. Discovery Rep., 32:1-32.
Foxton P. 1971. On Ihlea magalhanica (Apstein) (Tunicata: Salpidae) and Ihlea racovitzai (van Beneden). Discovery Rep., 35:179-198.
—Two excellent systematic and distributional works covering Antarctic and subantarctic waters.

Godeaux J. 1990. Urochordata-Thaliacea. In "Reproductive biology of invertebrates" (Adiyodi K.G., Adiyodi R.G., eds.), Oxford & IBH Publ. Co., New Delhi, pp. 453-469.
—A concise review of reproductive biology in Thaliacea, with detailed illustrations.

Krüger H. 1939. Die Thaliaceen der "Meteor" Expedition. Wiss. Erg. Deutsch. Atlant. Exp. "Meteor" 1925-1927, 13(2):111-152.
—Comprehensive work on the distribution of Thaliacea in the South Atlantic Ocean.

Van Soest R.W.M. 1973. The genus Thalia Blumenbach, 1798 (Tunicata, Thaliacea), with descriptions of two new species. Beaufortia, 20:193-212.
Van Soest R.W.M. 1973. A new species in the genus Salpa Forskål, 1775 (Tunicata, Thaliacea). Beaufortia, 21:9-15.
Van Soest R.W.M. 1974. Taxonomy of the subfamily Cyclosalpinae Yount, 1954 (Tunicata, Thaliacea), with descriptions of two new species. Beaufortia, 22:17-55.
Van Soest R.W.M. 1974. A revision of the genera Salpa Forskål, 1775, Pegea Savigny, 1816, and Ritteriella Metcalf, 1919 (Tunicata, Thaliacea). Beaufortia, 22:153-191.
Van Soest R.W.M. 1975. Observations on taxonomy and distribution of some salps (Tunicata, Thaliacea), with descriptions of three new species. Beaufortia, 23:105-129.
Van Soest R.W.M. 1975. Zoogeography and speciation in the Salpidae (Tunicata, Thaliacea). Beaufortia, 23:181-215.
—In this series of contributions Van Soest critically and completely revised the systematics of the order Salpida; they include simple species identification keys and world-wide distribution data.