Isospora sagittulae McQuistion &
Type host: Hylophylax naevioides
naevioides (Spotted antbird)
Type locality: SOUTH AMERICA:
Ecuador, Provincia de Esmeraldas, ca. 20 km NNW of Alto Tambo.
Geographic distribution: SOUTH
AMERICA: Ecuador, Provincia de Esmeraldas.
Description of oocyst: Oocyst shape:
ovoid to ellipsoid; number of walls: 2; wall characteristics: smooth,
colorless outer surface with darker, inner layer; L x W: 27.5 x 21.8
(21-24 x 25-30); L/W ratio: 1.3;
M: absent; OR: absent; PG: 1-3. Distinctive features of oocyst: lack of
M and OR.
Description of sporocysts and
sporozoites: Sporocyst shape: subspheroid to ovoid; L x W: 14.8 x
12.4 (12-13 x 13-16); L/W ratio: 1.2 (1.1-1.3); SB: present as thin,
dense body; SSB: present, triangular-shaped and protrudes into SB; PSB:
absent; SR: present, randomly scattered in sporocyst; SP: have 1 prominent
ovoid posterior RB and a small, ovoid, centrally located nucleus.
Distinctive features of sporocyst: scattered SR.
Prevalence: 3 of 3 (100%).
Sporulation: Exogenous. Oocysts were
stored in 2.5% (w/v) aqueous potassium dichromate solution at ambient
temp. for up to 2 m prior to examination.
Prepatent and patent periods:
Site of infection: Unknown.
Oocysts found in feces.
Materials deposited: None.
Remarks: This species has not been
reported since its original description.
Reference: McQuistion & Capparella