Type host: Tupaia glis (Diard, 1820), Common tree-shrew.

Other hosts: Tupaia minor Günther, 1876, Lesser tree-shrew; Tupaia tana Raffles, 1821, Large tree-shrew.

Type locality: ASIA: Malaysia, Malaya, Selangor, Bukit Lanjan.

Geographic distribution:ASIA: Malaysia, Malaya and Borneo.

Description of oocyst: Oocyst shape: spheroid to subspheroid; number of walls: 3; wall thickness: 1.5; wall characteristics: striated, composed of coarse outer layer that often separates during processing, a thin middle layer that also may be absent, and a thick, smooth, inner layer underlaid by a thin membrane that appears smooth when only the inner layer is present; L x W: 20 x 19 (15-28 x 14-25); L/W ratio: 1.05 (1.0-1.3); M: absent; OR: present; OR characteristics: a homogenous globule, present only in fresh oocysts; OR L x W: 4-10; PG: present; number of PG: 1 (in line drawing); Distinctive features of oocyst: striated outer wall is similar to that of E. ptilocerci.

Description of sporocysts and sporozoites: Sporocyst shape: ellipsoid; L x W: 11 x 7 (8-12 x 6-9); L/W ratio: 1.6 (1.1-1.8); SB: present; SSB: absent; PSB: absent; SR: present; SR characteristics: composed of many coarse granules that lie in a band between SP; SP: elongate, each with large posterior RB. Distinctive features of sporocyst: shorter, with smaller L/W ratio (1.4 vs. 1.9) than those of E. ptilocerci.

Prevalence: Oocysts were collected from at least 6 T. glis and 1 T. minor (Mullin et al., 1972). Mullin and Colley (1972) found 5/19 (26%) T. tana, 1/8 (12.5%) T. minor, and 1/1 T. glis to be infected with E. tupaia.

Sporulation: Exogenous. Oocysts sporulated within 1 wk in 2.5% aqueous potassium dichromate solution at 30ºC.

Prepatent and patent periods: Unknown.

Site of infection: Unknown. Oocysts recovered from feces.

Material deposited: None.

Remarks: According to Mullin et al. (1972), measurements of sporulated oocysts from 1 T. minor differed slightly: Oocyst L x W: 24 x 22 (19-29 x 17-25); L/W ratio: 1.1 (1.0-1.4). Sporocyst: L x W: 11 x 8 (9-12 x 7-10); L/W ratio: 1.4 (1.1-1.5).

Reference: Mullin and Colley (1972); Mullin et al. (1972).