The first chasmataspidid to be discovered was Chasmataspis laurencii, described by the American palaeontologists Kenneth E. Caster and H. K. Brooks in 1956. These Ordovician fossils come from the site of the Douglas Dam in Tennessee, USA. They are the most xiphosuran-like of the known chasmataspidid species, with a horseshoe-shaped carapace. Caster & Brooks raised a new family, Ch… Dvulikiaspis is a genus of chasmataspidid, a group of extinct aquatic arthropods. Fossils of the single and type species, D. menneri, have been discovered in deposits of the Early Devonian period (Lochkovian epoch) in the Krasnoyarsk Krai, Siberia, Russia. The name of the genus is composed by the Russian word двуликий (dvulikij), meaning "two-faced", and the Ancient Greek word ἀσπίς (aspis), …

(PDF) A new Lagerstätte from the Late Ordovician Big Hill Formation ...

WebA Lagerstätte (German: [ˈlaːɡɐˌʃtɛtə], from Lager 'storage, lair' Stätte 'place'; plural Lagerstätten) is a sedimentary deposit that exhibits extraordinary fossils with exceptional preservation—sometimes including preserved soft tissues. These formations may have resulted from carcass burial in an anoxic environment with minimal bacteria, thus … WebHoplitaspis is a genus of chasmataspidid, an extinct group of aquatic arthropods.Fossils of Hoplitaspis have been discovered in Late Ordovician deposits of the Lagerstätte of the … how to winterize potted geraniums

Representative fossils from the Late Ordovician Big Hill …

WebDownload scientific diagram Hoplitaspis hiawathai, UWGM 1873-three almost complete specimens. a Dorsal view of UWGM 1873A (holotype; largest specimen), preserving … WebConclusions The large body size and well-developed appendage armature of Hoplitaspis reveals that chasmataspidids occupied a greater breadth of ecological roles than … WebNov 4, 2024 · However, Chasmataspis and the diploaspidid Hoplitaspis, both known from the Ordovician, reached body sizes in excess of 60 mm (Dunlop et al. 2004; Lamsdell et al. 2024). Kiaeria is also distinct from diploaspidids in possessing a demarcated axial region on the buckler and the expanded anterior articulation (Fig. 1a, b). how to winterize potted hydrangea