Volvox stock illustrations

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Volvox is a polyphyletic genus of chlorophyte green algae in the family Volvocaceae. It forms spherical colonies of up to 50,000 cells.

Green algae (Volvox globator): 1) Spherical colony, a - a" - male organs, bb - female organs (Oogonium); 2) Fertilization of a female organ by floating seeds (Spermatozoids); 3) Immature egg spore; 4) Spermatozoids bundle; 5) Spermatozoids, isolated and in motion; 6) Spermatozoids, killed by iodine solution to visualize the attachment of the flimmer flagellum; 7) Detail of a spherical colony, a - reproductive cell, b - three vegetative cells, semi-schematic. Volvox is a polyphyletic genus of chlorophyte green algae in the family Volvocaceae. It forms spherical colonies of up to 50,000 cells. They live in a variety of freshwater habitats. Wood engraving, published in 1894.

Hand-drawn doodle sketch of a microscope, microscope slides and various close-ups of microscopic substances and tissues. Lined paper is on layer that can be easily removed. All items are grouped and on layers for easy adjustment. XL 5000x5000 jpeg included.

Diatoms belong to a large group called the heterokonts, which include both autotrophs such as golden algae and kelp; and heterotrophs such as water moulds. They are a major component of marine phytoplankton and are the main primary producers of organic matter, thus forming a substantial part of the base of the food pyramid. As oxygen-producing phototrophs they generate a large part of the oxygen in the earth's atmosphere. There are around 6000 species today. However, it is believed that there are up to 100,000 species in total. Diatoms are mainly found in the sea and in freshwater in planktonic or benthic form, or they are found on stones or aquatic plants (epiphytes). Some species need pure and hardly polluted water and for this reason are also indicator organisms for unpolluted waters. Other species, in turn, which are also referred to as agricultural guilds, are typical of bodies of water that are particularly polluted by agricultural inputs, e.g. by overfertilization. Explanations in German. Wood engravings, published in 1893.

Seaweed and algae: 1) Frog spawn algae (Batrachospermum gelatinosum); 2) Flower tang (Gongrocerus Deslongchampii); 3) Bladder wrack (Fucus vesiculosus, or Fascus vesiculosus); 4) Spirotaenia; 5) Volvox globator; 6) Green alga (Chlorophyta). Description in German. Wood engravings, published in 1893.

Fungi: 1) Lachnellula willkommii (or Peziza willkommii); 2) Gyromitra esculenta (or Helvella esculenta); 3) Morel (Morchella esculenta); 4) Structure of a foliose lichen (Parmelia molybdea); 5) Gonidia of Cladonia furcata. Chromolithograph, published in 1895.

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