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Stethacanthus is an extinct genus of shark-like cartilaginous fish which lived from the Late Devonian to Late Carboniferous epoch, dying out around 298.9 million years ago. Fossils have been found in Australia , Asia , Europe and North America .
Stethacanthus altonensis is the type species of the family Stethacanthidae, therefore, all stethacanthids meet certain morphological characters best represented in this species. Stethacanthids are medium-sized cladodont shark-like holocephalians with a short rostrum , broad supraorbital region, and short otic region.
Approximately 0.068% of all evaluated plant species are listed as extinct in the wild. The IUCN also lists one plant subspecies as extinct in the wild. This is a complete list of extinct in the wild plant species and subspecies as evaluated by the IUCN. All are vascular plants (tracheophytes).
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 116 extinct species, 132 possibly extinct species, 35 extinct in the wild species, 13 possibly extinct in the wild species, five extinct subspecies, one extinct in the wild subspecies, and four extinct varieties of plant.
Native plants have evolved in balance with the rest of the ecosystem. Local pollinators and wildlife rely on native species, and are just as threatened by invasive, non-local plants as the natives ...
Falcatus is an extinct genus of falcatid chondrichthyan which lived during the early Carboniferous Period in Bear ... Two Stethacanthus species, S. altonensis and S ...
A PhD student accused of raping 10 women using alcohol and drugs has denied buying a drug from China in order to carry out sexual assaults on women.
On 29 January 2010, the IUCN Red List of Threatened Species identified 842 (746 animals, 96 plants) extinct species, subspecies and varieties, stocks and sub-populations.