what is the name of the small red macroalgae that develop a hard crust
Coralline algae
title: Cliona celata text: Cliona celata Cliona celata, occasionally called the red boring sponge, is a species of demosponge belonging the family Clionaidae. It is found worldwide. This sponge creates round holes up to in diameter in limestone or the shells of molluscs, especially oysters. The sponge itself is often visible as a rather featureless yellow or orange lump at the bottom of the hole. These sponges are common in Southern New England and in Narragansett Bay. They also live in the Bahamas and the western Atlantic Ocean. They usually live in lagoons or on reefs. They will sometimes make their home on dead title: Microalgae text: Microalgae Microalgae or microphytes are microscopic algae, typically found in freshwater and marine systems, living in both the water column and sediment. They are unicellular species which exist individually, or in chains or groups. Depending on the species, their sizes can range from a few micrometers (µm) to a few hundred micrometers. Unlike higher plants, microalgae do not have roots, stems, or leaves. They are specially adapted to an environment dominated by viscous forces. Microalgae, capable of performing photosynthesis, are important for life on earth; they produce approximately half of the atmospheric oxygen and use simultaneously the greenhouse gas carbon title: Lucanus capreolus text: Lucanus capreolus Lucanus capreolus (commonly known as reddish-brown stag beetle) is a beetle of the family Lucanidae. The specific name "capreolus" is derived from Latin, meaning "roe deer" ("capreolus" literally means "little goat"). The name refers to the resemblance of the antennae to deer antlers. A relatively large lucanid beetle of the genus "Lucanus", the male has long, curved upper jaws, resembling a sickle. The larvae are found in the trunks of old trees, feeding on the inner wood. It is dark reddish brown in color with smooth, shiny elytra; the femora are orange-brown. Males have much larger jaws than title: Hildenbrandiales text: Hildenbrandiales Hildenbrandiales is an order of crustose forms red alga which bear conceptacles and produce secondary pit-connections. They reproduce by vegetative gemmae as well as tetrasporangia, which are produced inside the conceptacles. The way in which the tetraspores are produced is unusual enough to justify the formation of this distinct order. Some members of the order are known from freshwater rivers as well . Hildenbradiales are difficult to discriminate on morphological grounds; tetrasporangia morphology is the only vaguely reliable character, but molecular techniques have indicated a monophyletic "Apophlaea" within a paraphyletic "Hildenbrandia", with many "Hildenbrandia" species being recognized as non-monophyletic. title: Hildenbrandiales text: Hildenbrandiales Hildenbrandiales is an order of crustose forms red alga which bear conceptacles and produce secondary pit-connections. They reproduce by vegetative gemmae as well as tetrasporangia, which are produced inside the conceptacles. The way in which the tetraspores are produced is unusual enough to justify the formation of this distinct order. Some members of the order are known from freshwater rivers as well . Hildenbradiales are difficult to discriminate on morphological grounds; tetrasporangia morphology is the only vaguely reliable character, but molecular techniques have indicated a monophyletic "Apophlaea" within a paraphyletic "Hildenbrandia", with many "Hildenbrandia" species being recognized as non-monophyletic.