Type host: Pipistrellus javanicus (Gray, 1838), Asian pipistrelle.

Other hosts: None reported to date.

Type locality: ASIA: Japan, Honshu, Niigata, Shiunji, Shium Golf Country Club.

Geographic distribution: ASIA: Japan, Honshu.

Description of oocyst: Oocyst shape: subspheroidal; number of walls: 2; wall thickness: ~1.0; wall characteristics: outer, mammillated, 2/3 of total thickness; inner, smooth; L x W: 20.3 x 18.1 (16-25 x 14-21); L/W ratio: 1.1 (1.0-1.3); M: absent; OR: present; OR characteristics: a singular globule, 2.0 x 3.8; PG: 1, small. Distinctive features of oocyst: rough outer wall and both OR and PG are present.

Description of sporocysts and sporozoites: Sporocyst shape: ovoidal; L x W: 10.6 x 6.6 (8-12 x 5-8); L/W ratio: 1.6 (1.2-1.9); SB: present as small, dark structure at slightly pointed end of sporocyst; SSB: absent; PSB: absent; SR: present; SR characteristics: 1-3 refractile spheroids; SP: lie head to tail, each with 1 RB. Distinctive features of sporocyst: SR of large refractile spherroids.

Prevalence: 1/4 (25%).

Sporulation: Presumably exogenous. Unfortunately, the feces from these bats were collected and stored in 2%(v/v) H₂SO₄; this was a mistake, because unlike 2.5% aqueous potassium dichromate solution, it is especially detrimental to the strucutral integrity and ability to sporulate of many of the oocysts stored in it.

Prepatent and patent periods: Unknown.

Site of infection: Unknown. Oocysts recovered from intestinal contents.

Materials deposited: Symbiotype host in the Museum of SW Biology, UNM: MSB No. 45547 (NK 6280, 26 June 1982). Photosyntypes of sporulated oocysts in the USNPS No. 86899.

Remarks: The sporulated oocysts of this species differ from those of other eimerians decribed from Pipistrellus spp. as noted in the remarks of E. chiropteri, E. kuhliensis, E. macyi, and E. pipistrellus.

References: Duszynski (1997).