Diatoms
Plumed diatoms
Central diatoms→ Round sieve algae suborder → Round sieve algae family: orthodonticaceae, small cyclic algae (Meni microcyclic algae), crested disc algae (reticulum)
Suborder Rhizomae
Suborder Hematodon
Central diatoms: radial structure of the shell, ring to oval, the pattern of the shell is radial, regularly aligned with the morphological center, or irregular, but never pinnate pinnate diatoms: cells do not form concentric structures, rarely oval to annular, elongated or boat-shaped, the pattern is arranged symmetrically on both sides, the surface is wired, ribbed, longitudinal crack (shell seam), the center of the shell surface is thickened, called the central node, called the end node at both ends. It is divided into 4 suborders: suborder Shellless Seam, Monococholace, Shell-like Seam Suborder, and Bicustal Seam Suborder.
Genus Orthophora
Morphological characteristics of the genus Orthophyllum: cell spherical, cylindrical, or barrel-shaped. The shell surface is round, and occasionally oval. It is often connected to grow straight chains, so it is called straight chain algae. There are no ejected spines around the shell, but some have thorns that pierce into neighbors, parallel to the chain axis, which is one of the characteristics of the species. The shell surface has holes or dotted lines arranged in a shoot-out pattern. Shell coats are often developed. Shell rings or rings. There are many small flaky or several leaf-like pigments inside the cell.
Granular straight-chain algae, Fuzzy straight-chain algae, Sandy straight-chain algae, Mutant straight-chain algae.
Phyllonorycter microflora
Morphological characteristics of the genus Chylocyticus: the annular part of the outer shell is striped, sometimes with scattered spines, smooth or granular in the center. Cells are disc-shaped and rarely oval in shape. The shell surface structure is divided into two outer rings with stripes or stripes toward the center, sometimes with small spines; The inner ring, the central part, is smooth and unstried, or has a centripetal arrangement of dots, or has an irregular arrangement. The shell surface is flat or undulating, especially in the central part. The pigment body is multi-disc-shaped. Cells live alone, or 2 to 3 are joined together, or embedded in their own secreted colloidal tubes.
Star Stripe Chyclic Algae, Meni Microcyclic Algae, Hubei Chyclic Algae.
Crested disc algae
Morphological characteristics of the genus Crested Discophylla: the shell is circular in appearance, the shell has radially arranged particles, and there are simple thick and short spines on the edges.
Shellless suborder: The shell has only a false shell slit, that is, a linear rib with intermittent tops, and only one family, namely the brittle rod algae. Important genus: Crunchy algae. The shell surface is prismatic to oblong-oval. The pattern is symmetrical left and right, perpendicular to the longitudinal axis. There are 1 to 4 pigment bodies per cell, and there are also multiple ones, which vary according to the species. It is often a population, with cells connected into banded or jagged populations, with a few star-like populations.
Suborder Dermatostomy: Shell slits begin at both ends of the cell, and the only family is the Family Trichocephalus. The main genera are Brachycephalus and Cucurbita.
Bulbophyllum spp
Pinnoflatos belong to the genus Phytophthora diatoms of the diatom phylum Pinnacle Diatomidae, order Crunchy Algae in the family Cynodocetes.
Morphological structure of Pinus sylvestris
Single cells, or concatenated into radial or fan-shaped populations. Cells are long linear, straight or narrow lanceolate, with fine lines, with false shell seams, and there are often square or rectangular unstried areas in the center of the shell. Straight rectangle with face. 2 pigmented bodies plate-like or columnar, mostly.
Monococcupational seam suborder: One shell has a true shell seam, the other shell has a false shell seam, the only family is the curved algae family, mainly belonging to the genus Curved algae and the ovate algae genus.
Double-shell seam suborder: Two shells are homomorphic, each with a true shell seam, the shape of the shell has or does not have a boat-shaped shape, and the top axis and the top shaft are mostly symmetrical. Most plume diatoms belong to this suborder, which is divided into 4 families: Scapaceae, Rhomboid algae, Mesh Algae, and Diplodocarpaceae.
Cyperaceous algae: It is the largest genus of diatoms, with 1850 species, and there are more than 100 species in China. The cells are boat-shaped to oval-shaped, with a broad mid-range and pointed ends, with some slight variations. There is a shell seam on the midline of the shell surface, which can move freely. The shell pattern is symmetrical left and right, generally dotted. There is a central section in the center of the shell, and an end node at each end.
Genus Cyperus
Diatom cell wall
The cell wall of diatoms is mostly synthesized by silicic acid, while the main organic part of other algae, in diatoms, the cell wall (or shell) is synthesized by two halves, of which the larger upper shell is like a box lid on the smaller lower shell The height of the two halves is the same, and the upper and lower halves (schale or vave), The mating surface is two mutually falling belt-shaped but in the gram piece of the Fayuan rice has changed camp and appropriately three and the box at this shell part called the shell set of many genera of this shell set is very vigorous the upper shell of the connecting belt is not intermittently, the egg is called the union, similar to the lotus joint. When observing diatoms, you can distinguish between two different forms: from the top of the shell, you can see a variety of patterns; Connected by the side print with a face view, it usually indicates the silhouette of the side. The structure of the shell of the diatom has two types of central diatoms Generally has a round shell, the cells are like a Petri dish, the appearance is radial extremely gorgeous striated diatoms Species have yoke-shaped, rod-shaped or boat-shaped cells, and the stripes on the shell surface are pinnate to the central line To investigate the thickness of 6 Xin Taro, the end of the end needs to be finally changed from the end of the taro page to become a polar shell seam The appearance of the diatom cell is related to the motility of the diatom cells.
The protoplasm of diatoms fills the entire cell and is completely surrounded by a siliceous cell wall, and the nucleus is located in a circular spherical structure of the central protoplasm. Most species of pigment bodies are wall-by-wall, and one or two pigment bodies are common in the shell-slit diatoms, while the shellless suborder contains countless disc-shaped pigment bodies. Central diatoms such as the genus Straight-chain algae have large, lobed disc-shaped pigment bodies, while other central diatoms, mainly marine species, are mostly small granular pigment bodies.
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