Auxospores and hormocysts are formed respectively by

Auxospores and hormocysts are formed by several diatoms and a few cyanobacteria respectively. Bacillariophyceae members (diatoms) are microscopic, eukaryotic, unicellular of colonial coccoid algae. These algae are sexually reproduced by the formation of auxospores in most cases. Bozi (1914) and Fermi (1930) reported that short sections of living cells att the tips of the trichomes of Wertiella lanosa become invested by a thick, lamellated, pigmented sheath. Such multicellular spore like structures function as perennating bodies. They are specially modified hormogones and are called hormospores or hormocysts.