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A Cambrian stem-group chaetognath, Timorebestia, first described in 2024, was much larger than modern species, showing that chaetognaths occupied different roles in marine ecosystems compared to today. [43] A more recent chaetognath, Paucijaculum samamithion Schram, has been described from the Mazon Creek biota from the Pennsylvanian of Illinois.
Fuxianospira gyrata is a Cambrian macroalgae found in the Chengjiang lagerstätte. [1] Preserved in clustered, helicoid groups, the filaments are threadlike, plain and without branches. [ 1 ] Brown and smooth in appearance, these structural characteristics display a resemblance to modern brown algae. [ 2 ]
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Proaulopora is a Cambrian–Ordovician fossil genus of calcareous algae.It has been variously thought to belong to the green algae, red algae or cyanobacteria.It was originally established by the Russian paleontologist Aleksandr Grigoryevich Vologdin [] in 1937, for species known from the Lower Cambrian of the western Altai Mountains.
The most widely supported explanation is that stromatolite builders fell victim to grazing creatures (the Cambrian substrate revolution); this theory implies that sufficiently complex organisms were common around 1 Ga. [26] [27] [28] Another hypothesis is that protozoa such as foraminifera were responsible for the decline, favoring formation of ...
This alga is an introduced species and a noxious aquatic weed in Hawaii. [2] This species was considered an introduced many countries with the sole main purpose of increasing the commercial aquaculture carrageenan industry; the carrageenan is a biopolymer extracted from algae and used extensively in the food industry for the formation of gels to stabilize fat in food with dairy products.
Micrasterias is a unicellular green alga of the order Desmidiales.Its species vary in size reaching up to hundreds of microns. Micrasterias displays a bilateral symmetry, with two mirror image semi-cells joined by a narrow isthmus containing the nucleus of the organism.
Ascidiacea, commonly known as the ascidians or sea squirts, is a paraphyletic class in the subphylum Tunicata of sac-like marine invertebrate filter feeders. [2] Ascidians are characterized by a tough outer test or "tunic" made of the polysaccharide cellulose.