| Ignatiaceae | |
|---|---|
Scientific classification  | |
| (unranked): | Viridiplantae |
| Division: | Chlorophyta |
| Class: | Ulvophyceae |
| Order: | Ignatiales Leliaert & Škaloud [1] |
| Family: | Ignatiaceae Leliaert & Škaloud [2] |
| Genera [2] | |
| |
Ignatiaceae is a family of green algae in the class Ulvophyceae. [2] It is the only family in the order Ignatiales. [1]
The Chlorophyceae are one of the classes of green algae, distinguished mainly on the basis of ultrastructural morphology. They are usually green due to the dominance of pigments chlorophyll a and chlorophyll b. The chloroplast may be discoid, plate-like, reticulate, cup-shaped, spiral or ribbon shaped in different species. Most of the members have one or more storage bodies called pyrenoids located in the chloroplast. Pyrenoids contain protein besides starch. Some green algae may store food in the form of oil droplets. They usually have a cell wall made up of an inner layer of cellulose and outer layer of pectose.
Chlorocystidaceae is a family of green algae. It is the only family in the order Chlorocystidales. The family was formerly placed in the order Ulotrichales.
Hormotila is a genus of green algae in the family Chaetophoraceae.
Pleurastrum is a genus of green algae, specifically of the Chlorophyceae. As of February 2022, it was the only genus in the family Pleurastraceae.
Bracteacoccus helveticus is a species of green algae, in the family Bracteacoccaceae. Under its synonym Cryococcus helveticus, it was the only species in the genus Cryococcus.
Sykidion is a genus of green algae. Pseudoneochloris is a synonym of this genus. As of March 2022, Sykidion was the only genus in the family Sykidiacaeae, which was the only family in the order Sykidiales.
Mesostigma is a genus of freshwater green algae, with a single species Mesostigma viride. As of February 2022, AlgaeBase classified it as the only genus in the family Mesostigmataceae, the only family in the order Mesostigmatales, the only order in the class Mesostigmatophyceae. It is now considered to be one of the earliest diverging members of green plants/algae (Viridiplantae).
Klebsormidiales is an order of charophyte algae. It is the only order in the class Klebsormidiophyceae. As of February 2022, AlgaeBase accepted two families in the order:
Sycidiales is an order of fossil charophyte green algae. The reproductive structures in Sycidales have a calcified cover, called a utricle, that is thought to prevent the zygote being dessiccated. Other Paleozoic families lack this cover, as do modern charophytes. Fossils of the family Sycidiaceae are found over the longest time span, from the Silurian to the Carboniferous.
Trochiliscaceae is a family of fossil charophyte green algae. It is the only member of the order Trochiliscales. The reproductive structures in Trochiliscaceae have a calcified cover, called a utricle, that is thought to prevent the zygote being desiccated. Other Paleozoic families lack this cover, as do modern charophytes. Fossils of Trochiliscaceae are from the Devonian.
Feistiellaceae is a family of freshwater green algae in the order Charales.
Wislouchia is a genus of chlorophyte green algae. The name was first published in 2021, as a replacement name for Raciborskiella. As of February 2022, it was the only genus in the family Wislouchiaceae.
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