1. Bhatia, B. L . 1938. Fauna of British India, Protozoa Sporozoa. London, Taylor and Francis, 497 pp.
2. Bhatia, B. L. and Setna, S. 1924. On some new cephaline Gregarines. Parasitol. 16: 279–288.
3. Gcus. A. 1969. Sporozocnticrchcn (Sporozoa). Die Gregarinida. In: Tierwelt Deutschlands. 57 Teil. Jena. Fischer. 608 pp.
4. Grassé, P 1953. Grégurinomorphes. In: Traitè de Zoologie. Paris. Mason. Vol. I. fasc. 2: 550 690.
5. Haldar D. P. and Chakraborty. N. 1976. Retractocephalus-A new genus of ccphalinc Grcgarincs (Protozoa: Sporozoa) from inscets. Current Science 45: 668–669.