Isospora striata McQuistion, Walden, & Capparella, 1997

Type host: Xiphorhynchus ocellatus napensis (Ocellated woodcreeper)

Type locality: SOUTH AMERICA: Ecuador, Provincia de Morona-Santiago ca 5 km SW of Taisha, 2º 22' S, 77º 30' W, 425 m elev.

Geographic distribution: SOUTH AMERICA: Ecuador.

Description of oocyst: Oocyst shape: ovoid; number of walls: 2 wall thickness: ~1.5; wall characteristics: smooth, colorless outer layer with darker, inner layer of about equal thickness ans outer; L x W: 18 x 16 (15-17 x 16-20); L/W ratio: 1.2 (1.0-1.2); M: absent; OR: absent; PG: present, rough, ovoid, ~2 in size. Distinctive features of oocyst: lack of M & OR.

Description of sporocysts and sporozoites: Sporocyst shape: ovoid; L x W: 11 x 8 (7-8 x 11-12); L/W ratio: 1.4 (1.4-1.5); SB: present, protruding, nipple-like; SB: present, rectangular, lying directly beneath SB; PSB: absent; SR: present; SR characteristics: spherical, ~ 3.5, composed of fine uniform granules; SP: vermiform, with large, oblong, posterior RB and small round, centrally located nucleus, the anterior ends tapering greatly and bearing concentric striations that run across the width from the RB to the anterior end, lending a ribbed appearance to the SP, arranged randomly and tightly in sporocysts. Distinctive features of sporocyst: striated SP.

Prevalence: 3 of 11 (27%).

Sporulation: Exogenous. Oocysts were stored in 2.5% (w/v) aqueous potassium dichromate solution at ambient temp. prior to examination.

Prepatent and patent periods: Unknown.

Site of infection: Unknown. Oocysts found in feces.

Materials deposited: Phototype and formalin-preserved oocysts, USNPC #84903 and 84904, respectively.

Remarks: This species has not been reported since its original description.

Reference: McQuistion et al. (1997).