| Tetrapachylasma arcuatum | |
|---|---|
 | |
| Tetrapachylasma arcuatum, South Pacific | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Thecostraca |
| Subclass: | Cirripedia |
| Order: | Balanomorpha |
| Family: | Pachylasmatidae |
| Subfamily: | Pachylasmatinae |
| Genus: | Tetrapachylasma |
| Species: | T. arcuatum |
| Binomial name | |
| Tetrapachylasma arcuatum Jones, 2000 | |
Tetrapachylasma arcuatum is a species of symmetrical sessile barnacle in the family Pachylasmatidae. [1] [2]
Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha and are the sister group to the Batoidea. Some sources extend the term "shark" as an informal category including extinct members of Chondrichthyes with a shark-like morphology, such as hybodonts. Shark-like chondrichthyans such as Cladoselache and Doliodus first appeared in the Devonian Period, though some fossilized chondrichthyan-like scales are as old as the Late Ordovician. The earliest confirmed modern sharks (selachimorphs) are known from the Early Jurassic around 200 million years ago, with the oldest known member being Agaleus, though records of true sharks may extend back as far as the Permian.
Pectus carinatum, also called pigeon chest, is a malformation of the chest characterized by a protrusion of the sternum and ribs. It is distinct from the related malformation pectus excavatum.
Stereospermum is a genus of trees in the paleotropical clade of the family Bignoniaceae. A species of Stereospermum is used in herbal medicine in Ayurveda as well as it is an integral part of the culture and tradition of the cold desert biosphere reserve.
Schizopetalon is a genus of plants in the family Brassicaceae.
Blechnum, known as hard fern, is a genus of ferns in the family Blechnaceae, subfamily Blechnoideae, according to the Pteridophyte Phylogeny Group classification of 2016. Two very different circumscriptions of the genus are used by different authors. In the PPG I system, based on Gasper et al. (2016), Blechnum is one of 18 genera in the subfamily Blechnoideae, and has about 30 species. Other sources use a very broadly defined Blechnum s.l., including accepting only two other genera in the subfamily. The genus then has about 250 species. In the PPG I circumscription, the genus is mostly neotropical, with a few southern African species.
The Encyclopedia of Life (EOL) is a free, online encyclopedia intended to document all of the 1.9 million living species known to science. It aggregates content to form "page"s for every known species. Content is compiled from existing trusted databases which are curated by experts and it calls on the assistance of non-experts throughout the world. It includes video, sound, images, graphics, information on characteristics, as well as text. In addition, the Encyclopedia incorporates species-related content from the Biodiversity Heritage Library, which digitizes millions of pages of printed literature from the world's major natural history libraries. The BHL digital content is indexed with the names of organisms using taxonomic indexing software developed by the Global Names project. The EOL project was initially backed by a US$50 million funding commitment, led by the MacArthur Foundation and the Sloan Foundation, who provided US$20 million and US$5 million, respectively. The additional US$25 million came from five cornerstone institutions—the Field Museum, Harvard University, the Marine Biological Laboratory, the Missouri Botanical Garden, and the Smithsonian Institution. The project was initially led by Jim Edwards and the development team by David Patterson. Today, participating institutions and individual donors continue to support EOL through financial contributions.
Chondrometopum arcuatum is a species of ulidiid or picture-winged fly in the family Tephritidae.
Discodon is a genus of soldier beetles in the family Cantharidae. There are more than 40 described species in Discodon.
Pseudactium arcuatum is a species of ant-loving beetle in the family Staphylinidae. It is found in North America.
Pseudactium is a genus of ant-loving beetles in the family Staphylinidae. There are about 12 described species in Pseudactium.
Animal Ethics is a nonprofit organization formed to promote discussion and debate around issues in animal ethics and to provide information and resources for animal advocates. They also do outreach work in several countries on the issue of speciesism. Their aim is to create a world where moral consideration is extended to all sentient beings. The organization's website covers topics such as speciesism, sentience, veganism and wild animal suffering and has content translated into several languages.
Hypnodendron is a genus of mosses belonging to the family Hypnodendraceae.
Megaphyllum is a genus of myriapods belonging to the family Julidae.
Diatoma is a genus of diatoms belonging to the family Fragilariaceae.
Pachylasmatidae is a family of symmetrical sessile barnacles in the order Balanomorpha. There are about 10 genera and at least 30 described species in Pachylasmatidae.
Leucadendron arcuatum, the red-edge conebush, is a flower-bearing shrub that belongs to the genus Leucadendron and forms part of the fynbos. The plant is native to the Western Cape, South Africa.
Tetrapachylasma is a genus of symmetrical sessile barnacles in the family Pachylasmatidae. There are about five described species in Tetrapachylasma.
Masistylum arcuatum is a species of parasitic flies in the family Tachinidae.
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