Type host: Myotis evotis (H. Allen, 1864), Gleaning myotis.

Other hosts: None reported to date.

Type locality: NORTH AMERICA: USA, New Mexico, Socorro Co., San Mateo Mountains, Bear Trap Canyon.

Geographic distribution: NORTH AMERICA: USA, New Mexico.

Description of oocyst: Oocyst shape: subspheroidal; number of walls: 2; wall thickness: ~1.2; wall characteristics: outer, yellowish, lightly pitted, ~2/3 of total thickness; inner, smooth; L x W: 21.3 x 18.6 (20-24 x 15-20); L/W ratio: 1.2 (1.1-1.3); M: absent; OR: absent; PG: 1, highly refractile. Distinctive features of oocyst: pitted outer wall and highly refractile PG in combination with absence of OR.

Description of sporocysts and sporozoites: Sporocyst shape: ovoidal; L x W: 12.2 x 8.0 (11-13 x 7.5-9); L/W ratio: 1.5 (1.4-1.7); SB: present, small, nipple-like; SSB: present, thin and difficult to see, 2-3x wider than SB; PSB: absent; SR: absent; SP: clearly seen with an elongate RB that is 1/2 the length of the SP. Distinctive features of sporocyst: large SSB and large RB.

Prevalence: 1/13 (8%).

Sporulation: Presumably exogenous. Oocysts sporulated in 2% aqueous (w/v) potassium dichromate solution in the field.

Prepatent and patent periods: Unknown.

Site of infection: Unknown. Oocysts recovered from feces.

Materials deposited: Symbiotype host: Myotis evotis in the Museum of SW Biology, UNM, MSB 53788 (NK 4203, 13 September 1980). Photosyntypes of the sporulated oocysts in the USNPC No. 88099.

Remarks: The outer oocyst wall is pitted rather than mammillated, so this species does not resemble any of the oocysts in the key provided by Scott and Duszynski (1997). In addition, the unique combination of structural features (pitted outer wall, tiny SB), or their absence (neither OR nor SR), distinguish the sporulated oocysts of this species from all those described previously from bats.

References: Duszynski et al. (1999); Scott and Duszynski (1997).