Synonyms: Caryospora epicratesi Lainson, Paiva do Nascimento, and Shaw, 1991.

Type host: Epicrates cenchria cenchria (L., 1758), Brazilian rainbow boa.

Other hosts: None to date.

Type locality: SOUTH AMERICA: Brazil, Rondonia, area of hydroelectric dam "Samuel." (8º 45' S, 63º 28' W).

Geographic distribution: SOUTH AMERICA: Brazil, Peru.

Description of oocyst: Oocyst shape: spheroidal (18%) to predominantly subspheroidal (82%); number of walls: 2; wall thickness: 1.5; wall characteristics: outer layer colorless, smooth, but appears striated, 1.0; inner layer non-striated, ~0.5; L x W: 22.9 x 21.4 (19-25 x 17.5-22.5); L/W ratio: 1.1 (1.0-1.2); M: absent; OR: absent; PG: present; number of PGs: 1, ~2.3 x 2.0, most frequently seen adhering to outer wall of sporocyst (67%) that to inner wall of oocyst (33%). Distinctive features of oocyst: PG that often adheres to outer wall of sporocyst or inner wall of oocyst.

Description of sporocysts and sporozoite: Sporocyst shape: broadly ellipsoidal; L x W: 17.6 x 12.5 (16-19 x 11- 12.5); L/W ratio: 1.4 (1.3-1.5); SB: present, conspicuous; SSB: present; PSB: absent; SR: present; SR characteristics: granules/globules of irregular size in a compact body surrounded by SZ; SZ: surround SR like staves of a barrel; 1 anterior and 1 posterior in each SZ. Distinctive features of sporocysts: SB/SSB complex forms a "stopper-like" structure at one end and SZ surround SR like staves of a barrel.

Prevalence: 1/1 (100%).

Sporulation: Exogenous, but exact length of time unknown.

Prepatent and patent periods: Unknown.

Site of infection: Unknown. Oocysts found in feces.

Endogenous development: Unknown.

Materials deposited: Oocysts in 10% formol-saline in the Department of Parasitology, Instituto Evandro Chagas, Belem, Para, Brasil, Repository No. FN62.

Remarks: Modry (1998) attempted to infect SCID mice with oocysts, but found no evidence of infection in histological sections. Frank (1985) published a photograph that may represent this species.