The Piegan are an Algonquian-speaking people from the North American Great Plains. They are the largest of three Blackfoot-speaking groups that make up the Blackfoot Confederacy; the Siksika and Kainai are the others. The Piegan dominated much of the northern Great Plains during the nineteenth century.
The Blackfoot Confederacy, Niitsitapi, or Siksikaitsitapi, is a historic collective name for linguistically related groups that make up the Blackfoot or Blackfeet people: the Siksika ("Blackfoot"), the Kainai or Blood, and two sections of the Peigan or Piikani – the Northern Piikani (Aapátohsipikáni) and the Southern Piikani. Broader definitions include groups such as the Tsúùtínà (Sarcee) and A'aninin who spoke quite different languages but allied with or joined the Blackfoot Confederacy.
The Blackfoot language, also called Siksiká, often anglicised as Siksika, is an Algonquian language spoken by the Blackfoot or Niitsitapi people, who currently live in the northwestern plains of North America. There are four dialects, three of which are spoken in Alberta, Canada, and one of which is spoken in the United States: Siksiká (Blackfoot), to the southeast of Calgary, Alberta; Kainai, spoken in Alberta between Cardston and Lethbridge; Aapátohsipikani, to the west of Fort MacLeod which is Brocket (Piikani) and Aamsskáápipikani, in northwestern Montana. The name Blackfoot probably comes from the blackened soles of the leather shoes that the people wore.
The Siksika Nation is a First Nation in southern Alberta, Canada. The name Siksiká comes from the Blackfoot words sik (black) and iká (foot), with a connector s between the two words. The plural form of Siksiká is Siksikáwa. The Siksikáwa are the northernmost of the Niitsítapi, all of whom speak dialects of Blackfoot, an Algonquian language.
Ackomokki or A-ca-oo-mah-ca-ye, was the name of three Siksiká chiefs between the late 1700s and 1860.
Hoplocarida is a subclass of crustaceans. The only extant members are the mantis shrimp (Stomatopoda), but two other orders existed in the Palaeozoic: Aeschronectida and Palaeostomatopoda.
Stethacanthus is an extinct genus of shark-like holocephalians 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.
The Bear Gulch Limestone is a limestone-rich geological lens in central Montana, renowned for the quality of its late Mississippian-aged fossils. It is exposed over a number of outcrops northeast of the Big Snowy Mountains, and is often considered a component of the more widespread Heath Formation. The Bear Gulch Limestone reconstructs a diverse, though isolated, marine ecosystem which developed near the end of the Serpukhovian age. It is a lagerstätte, a particular type of rock unit with exceptional fossil preservation of both articulated skeletons and soft tissues. Bear Gulch fossils include a variety of fish, invertebrates, and algae occupying a number of different habitats within a preserved shallow bay.
Belantsea is a genus of extinct petalodontid cartilaginous fish that lived during the Lower Carboniferous, about 350 million years ago. Its fossils are found in the Bear Gulch Limestone lagerstätte. Its body was leaf-shaped, with muscular fins and a small tail. Such a body plan would allow for great maneuverability, but at the cost of speedy cruising. Its few, large, triangular teeth formed a beak-like arrangement that allowed it to graze bryozoans, sponges, crinoids, and other encrusting animals. The genus contains two species, B. montana and B. occidentalis.
Falcatus is an extinct genus of falcatid chondrichthyan which lived during the early Carboniferous Period in Bear Gulch bay in what is now Montana.
Stethacanthidae is an extinct family of prehistoric holocephalians. It is estimated to have existed approximately between 380 and 300 million years ago. Members of this family are noted for their peculiar dorsal fin.
Harpagofututor is an extinct genus of cartilaginous fish from the Mississippian of North America.
Netsepoye is an extinct genus of cartilaginous fish distantly related to the modern order Chimaeriformes, containing the single species Netspoye hawesi. It lived more than 320 million years ago during the Late Mississippian.
Falcatidae is a family of Paleozoic holocephalians. Members of this family include Falcatus, a small fish from the Bear Gulch Limestone of Montana. The family first appeared around the start of the Carboniferous, and there is some evidence that they survived well into the early Cretaceous, though its putative Cretaceous members were also argued to be more likely neoselachians.
Echinochimaera is an extinct genus of chimaeriform fish, known from the Lower Carboniferous Bear Gulch Limestone in Montana, United States. It is one of the earliest Chimaeriformes known.
Sairocaris is an extinct genus of crustaceans, in the order Hoplostraca, that lived in the Mississippian age.
Debeerius is a genus of chondrichthyan from the Mississippian age Bear Gulch Limestone of Montana, United States. It is named after Gavin de Beer. One species, D. ellefseni, is known.
Guildayichthyidae is a prehistoric family of marine fish from the Mississippian Bear Gulch Limestone of Montana. It is the only family in the order Guildayichthyiformes. Guildayichthyids possess an uncommon mixture of primitive and modern characteristics in their skull bones.
Gregoriidae is an extinct family of early sharks from the Carboniferous period. It currently includes three described genera: Gregorius, Srianta, and Bealbonn. This family includes remains formerly ascribed to "Desmiodus," which is now considered a nomen vanum. The relationships between the included genera are not entirely clear. Fossils are known from Serpukhovian-aged formations including the Bear Gulch Limestone and Surprise Canyon Formation.
Syllipsimopodi is an extinct member of the cephalopod subclass Coleoidea belonging to the clade Vampyropoda, which includes octopuses (Octopoda) and vampire squids (Vampyromorphida). The type and only known species is Syllipsimopodi bideni, named in honor of US President Joe Biden, and to raise awareness of his climate change policies. The well-preserved holotype fossil was found in the Bear Gulch Limestone deposit in the US state of Montana in 1988, and donated that year to the Royal Ontario Museum by one B. Hawes, designated ROMIP 64897. The species lived during the (Carboniferous) mississippian 330.3 to 323.4 million years ago pushing back the group of cephalopods by 81.9 million years. The cephalopod was named after Joe Biden, who was president of the United States at the time of its discovery. Whalen and Landman said in an interview that this name was chosen because they were, “encouraged by his plans to address climate change and to fund scientific research”.
