Thoracosphaeraceae

Belongs within: Peridiniales.Contains: Scrippsiella. The Thoracosphaeraceae are a group of dinoflagellates of which many members are unique among alveolates in producing calcareous structures, either as resting cysts or during vegetative stages (Gottschling et al. 2005, as Calciodinellaceae). Molecular phylogenies also indicate the inclusion of a number of non-calcareous taxa in this clade. Zooxanthella nutricola is… Continue reading Thoracosphaeraceae

Spongentactiniidae

Belongs within: Spumellaria. The Spongentactiniidae are a group of radiolarians known from the Middle Cambrian to the Permian (Afanasieva et al. 2005). Characters (from Afanasieva et al. 2005): Inner frame in shape of four- to six-rayed spicule, rays of which are connected to four to six external main spines that are three-bladed, conical, or rodlike… Continue reading Spongentactiniidae

Published
Categorised as Radiozoa

Spumellaria

Belongs within: Radiozoa.Contains: Spongentactiniidae, Spongopolyentactiniidae, Haplentactiniidae. The Spumellaria are a major group of radiolarians with a spongy or porous skeleton (Afanasieva et al. 2005). Radiolarians of the globe Published 9 January 2019 Radiolarians are one of the primary groups of micro-organisms to be found among the marine plankton. These unicellular greeblies are justly famed for… Continue reading Spumellaria

Haplentactiniidae

Belongs within: Spumellaria. The Haplentactiniidae are a group of radiolarians known from the Middle Cambrian to the Early Permian, characterised by a simple initial spicule formed by the intersection of spines in a single center (Afanasieva et al. 2005). Characters (from Afanasieva et al. 2005): Latticed wall of external shell and inner frame in shape… Continue reading Haplentactiniidae

Published
Categorised as Radiozoa

Spongopolyentactiniidae

Belongs within: Spumellaria. The Spongopolyentactiniidae are a group of radiolarians known from the Middle Cambrian to the Permian (Afanasieva et al. 2005). Characters (from Afanasieva et al. 2005): Inner frame in shape of 8-, 12-, -24, or more-rayed spicule, rays of which are connected to 8, 12, 24, or more external main spines (three-bladed, conical,… Continue reading Spongopolyentactiniidae

Published
Categorised as Radiozoa

Popofskyelloidea

Belongs within: Nassellaria. The Popofskyelloidea are a group of radiolarians known from the Late Devonian to the Jurassic (Afanasieva et al. 2005). Characters (from Afanasieva et al. 2005): Bilaterally-symmetrical conical segmented external skeleton. Subspherical apical segment present. Porous, lamellar external shell and inner frame in shape of spicule and two columellae. <==PopofskyelloideaAA05 |–Hexapylocapsa Dumitrica &… Continue reading Popofskyelloidea

Published
Categorised as Radiozoa

Nassellaria

Belongs within: Radiozoa.Contains: Popofskyelloidea, Cessipyloroidea, Pylentonemoidea, Archipilioidea, Acropyramidoidea, Lychnocanioidea, Eucyrtidioidea, Stichocapsoidea, Amphipyndacioidea, Cannobotryoidea, Triospyrididae, Acanthodesmiidae. The Nassellaria are a major group of radiolarians known from the Cambrian to the present. Members possess a heteropolar or bilaterally symmetrical skeleton comprising an inner frame and an external shell. Palaeozoic members of the Nassellaria are assigned to the… Continue reading Nassellaria

Published
Categorised as Radiozoa

Pylentonemoidea

Belongs within: Nassellaria.Contains: Saitoum. The Pylentonemoidea are a group of radiolarians known from the Silurian to the Cretaceous (Afanasieva et al. 2005). Characters (from Afanasieva et al. 2005): Spheroid or cylindroid with porous, less commonly spongy wall of external shell and inner initial frame represented by spicule. External skeleton sometimes segmented into portions (“cephalis,” “thorax”);… Continue reading Pylentonemoidea

Published
Categorised as Radiozoa

Cessipyloroidea

Belongs within: Nassellaria. The Cessipyloroidea are a group of radiolarians known from the Middle Ordovician to the Middle Triassic. They are characterised by a spherical test with a porous or spongy wall in the external shell and an inner frame in the shape of a hollow sphere or isometric polyhedron (Afanasieva et al. 2005). <==CessipyloroideaAA05… Continue reading Cessipyloroidea

Published
Categorised as Radiozoa

Sethoperinae

Belongs within: Archipilioidea. The Sethoperinae are a group of radiolarians with a porous or cellular test containing one to three segments, known from the Early Jurassic (Pliensbachian) to the present (Afanasieva et al. 2005). <==Sethoperinae AA05 |–Arachnopilium Haeckel 1881 AA05 |–Artopera Haeckel 1881 AA05 |–Clathrocorona Haeckel 1881 AA05 |–Clathrocorys Haeckel 1881 AA05 |–Clathrolychnus Haeckel 1881… Continue reading Sethoperinae

Published
Categorised as Radiozoa