sporelike
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Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… … Universalium
Psorosperm — is a name formerly given to a number of parasitic protozoa which produce cystlike or sporelike structures in the tissue of hosts, but now essentially obsolete. Some which affect vertebrate hosts are now identified as coccidia. Others, such as the … Wikipedia
cyst — /sist/, n. 1. Pathol. a closed, bladderlike sac formed in animal tissues, containing fluid or semifluid matter. 2. a bladder, sac, or vesicle. 3. Bot., Mycol. a. a sporelike cell with a resistant, protective wall. b. a cell or cavity enclosing… … Universalium
Ordovician Period — Interval of geologic time, 490–443 million years ago, the second oldest period of the Paleozoic Era. It follows the Cambrian and precedes the Silurian. During the Ordovician, many of the landmasses were aligned in the tropics. Life was dominated… … Universalium
Sarcocystis — ▪ protozoan genus of sporozoan parasites (phylum Protozoa) that are found in the heart and skeletal muscles of mammals (cattle, pigs, sheep, and man), birds, and reptiles. Infected muscle tissue contains white, cystlike masses (sarcocysts)… … Universalium
