Type host: Nyctinomops femorosaccus (Merriam, 1889) (Syn. Tadarida femorosacca), Pocketed free-tail bat.

Other hosts: None reported to date.

Type locality: NORTH AMERICA: Mexico, Sonora, 19.3 km E Alamos by road, Rio Cuchujaqui.

Geographic distribution: NORTH AMERICA: Mexico, Sonora.

Description of oocyst: Oocyst shape: subspheroidal to ellipsoidal; number of walls: 2; wall thickness: ~1.5, of uniform thickness; wall characteristics: outer, mammillated, 2/3 of total thickness; inner, smooth, colorless; L x W: 25.2 x 19.0 (20-30 x 16-23); L/W ratio: 1.3 (1.2-1.6); M: absent; OR: absent (?); PG: 1-3 fragments that may be remnants of an OR. Distinctive features of oocyst: rough outer wall.

Description of sporocysts and sporozoites: Sporocyst shape: ovoidal; L x W: 12.1 x 7.6 (10-14 x 6-9); L/W ratio: 1.6 (1.4-1.7); SB: present as darkened line at 1 end of sporocyst and difficult to see; SSB: present (?---there always is a clear space below pointed end of sporocyst), asymmetrical , 2-3x wider than SB; PSB: absent; SR: present; SR characteristics: several small to large globules and granules sometimes obscuring SP; SP: with 1 large, posterior RB. Distinctive features of sporocyst: asymmetrical SSB, 2-3x wider than SB.

Prevalence: 1/18 (5.5%).

Sporulation: Exogenous (?). Oocysts sporulated in 2.5% aqueous (w/v) potassium dichromate solution while transported from the field.

Prepatent and patent periods: Unknown.

Site of infection: Unknown. Oocysts recovered from feces.

Materials deposited: Symbiotype host in the Museum of SW Biology, UNM: No. 53835 (27 October 1980). Photosyntypes of sporulated oocysts in the USNPC No. 86002.

Remarks: This species somewhat resembles E. tomopea, E. macyi, and E. eumopos. The oocysts of this form differ from those of E. tomopea by being smaller and lacking a PG; they also have smaller sporocysts that have a SSB that E. tomopea lacks, although in both species the SB is difficult to visualize. They differ from those of E. macyi by having larger oocysts and a larger L/W ratio (1.3 vs 1.1) and by having a SSB that is 2 to 3 times wider than the SB vs one that is the same width. They differ from those of E. eumopos by being smaller (25 x 19 vs 35 x 28), by having a thinner outer wall that is mammillated, not pitted, and by hving sporocysts with a SSB that E. eumopos lacks.

References: Duszynski, Reduker, and Parker (1988).