Description of Tardivesicula
provided by BioPedia
The type species is T. duplicata Larsson and BylÃn, 1992 in fat body of larvae of Limnephilus duplicata (Trichoptera, Limnephilidae). Monomorphic, monokaryotic throughout life cycle. Meiosis unknown. Transmission unknown. Merogony: numerous uninucleate merozoites produced by fragmentation of rounded or chainlike meronts with unpaired nuclei. Sporogony: polysporoblastic by rosettelike budding of the sporogonial plasmodia into 1632 uninucleate sporoblasts. Sporophorous vesicle appears as a thin, uniform, membranelike envelope only after full division of the plasmodium into lobes. The mature ellipsoid sporophorous vesicle is fragile with sparse tubular inclusions and 1632 spores. Spores, 3.74.2 x 1.31.4 µm, are rodshaped and uninucleate. Exospore is threelayered with a median component resembling a unit membrane. Polaroplast is lamellar, with the anterior lamellae more closely packed. Polar tube is isofilar with 910 coils in a single rank.
