Belongs within: Tannuolinidae.Contains: Circothecida, Orthothecida, Sulcavitida, Hyolithidae, Crispatellidae. Hyoliths were a group of small shelled animals that mostly lived during the Cambrian and Ordovician (though probable hyoliths remained alive as late as the Permian—Peel & Yochelson 1984). They possessed a bilaterally symmetrical conical shell that was open at one end only and closed by an… Continue reading Hyolitha
Category: Tannuolinidae
Stricklandioidea
Belongs within: Pentamerida. The Stricklandioidea are a Silurian group of pentameridan brachiopods with the brachial apparatus much abbreviated. <==Stricklandioidea | i. s.: Aenigmastrophia Boucot 1971RZJ04 | Spondylostrophia Sapelnikov & Rukavishnikova 1975RZJ04 | Stricklandiella Sapelnikov & Rukavishnikova 1973RZJ04 | `–S. robusta (Rong & Yang 1981)RZJ04 `–Stricklandiidae [Stricklandidae, Stricklandiniidae]AB65 | i. s.: Prostricklandia Rukavishnikova & Sapelnikov 1973HB93, RZJ04… Continue reading Stricklandioidea
Pentamerida
Belongs within: Rhynchonellata.Contains: Stricklandioidea, Gypidulidae, Clorindinae, Pentameridae, Virgianidae, Huenellidae, Clarkellidae, Camerellidae, Parastrophinidae, Tetralobulidae. The Pentamerida are a group of brachiopods with an impunctate shell and an unrestricted pedicle opening, known from the Middle Cambrian to the Upper Devonian. In the Middle Cambrian to Lower Devonian Porambonitacea, the brachiophores are united by supporting plates of variable… Continue reading Pentamerida
Pentameridae
Belongs within: Pentamerida. The Pentameridae were a family of brachiopods that lived from the Upper Ordovician to the Lower Devonian (Amsden & Biernat 1965). In some genera, such as Conchidium and Lissocoelina, the pedicle valve is distinctly rostrate, arching over the brachial valve. The Silurian genus Pentamerus was large and elongate, with a smooth surface (Amsden &… Continue reading Pentameridae
Gypidulidae
Belongs within: Pentamerida. The Gypidulidae are a family of more or less galeatiform brachiopods (with a high, arched beak) known from the Silurian and Devonian periods (Amsden & Biernat 1965). Characters (Amsden & Biernat 1965): More or less galeatiform shells with interareas; fold and sulcus generally well developed, occasionally absent; exterior smooth, costate, pitted or granulose. Brachial… Continue reading Gypidulidae
Huenellidae
Belongs within: Pentamerida. The Huenellidae are a short-lived family of brachiopods known from the Upper Cambrian and Lower Ordovician (Amsden & Biernat 1965). The Huenellidae Published 4 April 2022 Researchers who deal with the modern marine fauna are used to thinking of brachiopods as a marginal group, their diversity greatly overshadowed on a global scale… Continue reading Huenellidae
Virgianidae
Belongs within: Pentamerida. The Virgianidae are a family of pentameridan brachiopods known from the Upper Ordovician and Lower Silurian (Amsden & Biernat 1965). Characters (Amsden & Biernat 1965): Smooth to costate, with interareas absent or poorly developed. Spondylium moderate in size to small, supporting septum short or absent; spondylium and septum relatively thick-walled. Brachial apparatus much abbreviated;… Continue reading Virgianidae
Camerellidae
Belongs within: Pentamerida. The Camerellidae are a family of pentameridan brachiopods known from the Ordovician and Silurian (Amsden & Biernat 1965). Characters (Amsden & Biernat 1965): Shell usually biconvex; spondylium duplex or simplex; septalium present; interarea weakly developed or obsolete. <==Camerellidae [Camerelloidea] | i. s.: Bleshidium triste Havlíček 1990HB93 | Branconia Gagel 1890SC31, M65 | `–*B. borussica… Continue reading Camerellidae
Clarkellidae
Belongs within: Pentamerida. The Clarkellidae are a family of small to medium-sized brachiopods known from the Upper Cambrian and Ordovician (Amsden & Biernat 1965). Characters (Amsden & Biernat 1965): Shells small or moderate in size; smooth or costellate; with spondylium simplex; septa of brachial valve discrete, divergent. <==ClarkellidaeAB65 |–Calliglypha Cloud 1948AB65 | `–*C. miseri Cloud 1948AB65 |–Stichotrophia… Continue reading Clarkellidae
Atriboniidae
Belongs within: Rhynchonellida. The Atriboniidae are a family of rhynchonellidan brachiopods found from the Middle Devonian to the Upper Permian (Ager et al. 1965). Characters (Ager et al. 1965): Stolidium lacking, costae weak, fine or absent, spondylium typically sessile in apex, intercamarophorial plate present or absent. <==AtriboniidaeAG65 | i. s.: Proatribonium alticum Gratsianova 1967HB93 | Ussuricamara majchensis Koczyrkevicz 1969HB93 |–AtriboniinaeAG65 |… Continue reading Atriboniidae