McQuistion T E
Millikin University, Department of Biology, Decatur, Illinois 62522.
J Parasitol. 1990 Feb;76(1):30-2.
In March and April 1987 fecal samples from 237 nestling birds, including 199 from 85 nest sites of Geospiza fortis, 23 from 12 nest sites of Geospiza scandens, 6 from 2 nest sites of Geospiza magnirostris, and 9 from 2 nest sites of hybrids involving Geospiza fuliginosa and G. fortis, were collected from Daphne Major in the Galapagos archipelago and examined for coccidia. Only 3 of 4 nestlings from 1 nest site of G. fortis (1.5%) had oocysts in their feces. Two of the 3 infected nestlings had concurrent infections of Isospora temeraria, and all 3 nestlings were infected with a new species. Isospora daphnensis n. sp. Sporulated oocysts of I. daphnensis n. sp. are ellipsoidal, 27.3 x 23.6 (22-30 x 20-27) microns; a polar body is present, but no oocyst residuum or micropyle occurs. The oocyst wall, approximately 1.5 microns thick, is composed of a mammillated outer layer and thinner inner layer. Sporocysts are ovoid, 15.2 x 10.2 (15-16 x 9-11) microns and have a nipplelike Stieda body and a small substieda body. The sporocysts contain an irregularly shaped, smoothly contoured residuum with uniform granules and 4 sporozoites with a large refractile body at one end and lying randomly in the sporocysts.
1987年3月和4月，从加拉帕戈斯群岛的达芙妮主岛采集了237只雏鸟的粪便样本，其中包括来自85个强地雀（Geospiza fortis）巢穴的199份样本、来自12个仙人掌地雀（Geospiza scandens）巢穴的23份样本、来自2个大嘴地雀（Geospiza magnirostris）巢穴的6份样本，以及来自2个涉及纯褐小地雀（Geospiza fuliginosa）和强地雀的杂交巢穴的9份样本，并对其进行球虫检查。在强地雀的1个巢穴中的4只雏鸟中，只有3只（1.5%）粪便中有卵囊。3只受感染的雏鸟中有2只同时感染了鲁莽等孢球虫（Isospora temeraria），且所有3只雏鸟都感染了一种新物种。达芙妮等孢球虫（Isospora daphnensis）新种。达芙妮等孢球虫新种的孢子化卵囊呈椭圆形，27.3×23.6（22 - 30×20 - 27）微米；有一个极体，但没有卵囊残体或微孔。卵囊壁约1.5微米厚，由有乳头样突起的外层和较薄的内层组成。孢子囊呈卵形，15.2×10.2（15 - 16×9 - 11）微米，有一个乳头状的斯氏体和一个小的亚斯氏体。孢子囊内含有一个形状不规则、轮廓光滑、有均匀颗粒的残体，以及4个一端有一个大折光体且随机位于孢子囊内的子孢子。
