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Artiopods
The Artiopoda is a grouping of extinct arthropods that includes trilobites and their close relatives. It was erected by Hou and Bergström in 1997 to encompass a wide diversity of arthropods that would traditionally have been assigned to the Trilobitomorpha. Hou and Bergström used the name Lamellipedia as a superclass to replace Trilobitomorpha that was originally erected at the subphylum level, which they considered inappropriate. Trilobites, in part due to their mineralising exoskeletons, are by far the most diverse and long lived members of the clade, with most records of other members, which lack mineralised exoskeletons, being from Cambrian deposits. Description According to Stein and Selden (2012) artiopods are recognised by the possession of filiform antennulae, limbs with bilobate exopods, with the proximal lobe being elongate and bearing a lamella, while the distal lobe is paddle-shaped and setiforous (bearing hair-or bristle like structures). The limb endopod has s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paradoxides
''Paradoxides'' is a genus of large to very large trilobite found throughout the world during the Middle Cambrian period. One record-breaking specimen of ''Paradoxides davidis'', described by John William Salter in 1863, is . The cephalon was semicircular with free cheeks ending in long, narrow, recurved spines. Eyes were crescent shaped providing an almost 360° view, but only in the horizontal plane. Its elongate thorax was composed of 19-21 segments and adorned with longish, recurved pleural spines. Its pygidium was comparatively small. ''Paradoxides'' is a characteristic Middle-Cambrian trilobite of the 'Atlantic' (Avalonian) fauna. Avalonian rocks were deposited near a small continent called Avalonia in the Paleozoic Iapetus Ocean. Avalonian beds are now in a narrow strip along the East Coast of North America, and in Europe. Description The exoskeleton of ''Paradoxides'' is large to very large, relatively flat, and about one and a half times longer than wide, with greate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xandarella
''Xandarella'' is an extinct genus of xandarellid artiopodan known from the Cambrian of China and Morocco, the type species ''Xandarella spectaculum'' was described in 1991 from the Cambrian Stage 3 aged Chengjiang Biota in China. An additional species ''Xandarella mauretanica'' was described from the Cambrian Stage 5 Tatelt Formation in Morocco in 2017, which preserved only the ventral Standard anatomical terms of location are used to unambiguously describe the anatomy of animals, including humans. The terms, typically derived from Latin or Greek language, Greek roots, describe something in its standard anatomical position. Th ... anatomy. Like other Xandarellids, the exoskeleton is unmineralised. The cephalon has pronounced eye slits, presumably derived from ancestral ventral stalked eyes. References Fossil taxa described in 1991 Artiopoda {{paleo-arthropod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinoburius
''Sinoburius'' is an extinct genus of xandarellid artiopodan known from the Cambrian aged Chengjiang Biota The Maotianshan Shales are a series of Early Cambrian deposits in the Chiungchussu Formation, famous for their '' Konservat Lagerstätten'', deposits known for the exceptional preservation of fossilized organisms or traces. The Maotianshan Shales ... of China. It is only known from the type species ''S. lunaris'', which was described in 1991. It is a rare fossil within the Chengjiang assemblage. Like other Xandarellids, ''Sinoburius'' has an unmineralised exoskeleton. Adult individuals are around 7-8 millimetres in length, with stalked eyes present on the ventral side. Unusually among artiopods, the antennae are strongly reduced in size. References Artiopoda Fossil taxa described in 1991 {{paleo-arthropod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cindarella
''Cindarella'' is genus of trilobite-like Cambrian arthropod known from the Chengjiang biota of China. It is classified in the stem group of trilobites (Artiopoda) in the clade Xandarellida, along with ''Phytophilaspis'', ''Sinoburius'', and ''Xandarella''. See also * Arthropod * Cambrian explosion * Chengjiang biota ** List of Chengjiang Biota species by phylum * Cinderella "Cinderella",; french: link=no, Cendrillon; german: link=no, Aschenputtel) or "The Little Glass Slipper", is a folk tale with thousands of variants throughout the world.Dundes, Alan. Cinderella, a Casebook. Madison, Wis: University of Wisconsi ... References External linksTrilobite Systematic Relationships Cambrian arthropods Maotianshan shales fossils Artiopoda {{paleo-arthropod-stub Cambrian genus extinctions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luohuilinella
''Luohuilinella'' is an extinct genus of xandarellid artiopodan arthropod known from the Chengjiang biota of China. The type species ''Luohuilinella rarus'' was described in 2012. A second species ''Luohuilinella deletres'' was described in 2018. Both taxa are rare components of the assemblage. Like other Xandarellids and most artiopodans, it possessed an unmineralised exoskeleton. The type and currently only known specimen of ''L. rarus'' is known from a dorsal exoskeleton, around 17 mm long and 9 mm wide which consists of 27 tergites with pronounced pleural spines. ''L. deletres'' is much larger, with specimens being over 10 cm long, ''L. deletres'' possessed at least 11 pairs of biramous appendages. Both taxa are dorsoventrally flattened, making a benthic or nektobenthic lifestyle probable. Both taxa have pronounced notches in the cephalon Cephalon, Inc. was an American biopharmaceutical company co-founded in 1987 by pharmacologist Frank Baldino, Jr., ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tegopelte
''Tegopelte gigas'' (from the Greek tegos, “tile,” and pelte, “leather-shield,” referring to the shape of the dorsal body covering; gigas – from the Greek gigas, “giant,” due to the huge size of the animalTegopelte gigas. A giant trilobite-like arthropod The Burgess Shale.) is a species of large (1 complete specimen was 27 cm) soft-bodied known from two specimens from the . |
Saperion
''Saperion'' is an extinct genus of trilobite-like arthropod. It lived during the late Atdabanian stage, which lasted from 521 to 514 million years ago during the early part of the Cambrian Period. It was found in the Maotianshan Shales The Maotianshan Shales are a series of Early Cambrian deposits in the Chiungchussu Formation, famous for their '' Konservat Lagerstätten'', deposits known for the exceptional preservation of fossilized organisms or traces. The Maotianshan Shales ... ''Saperion'' reached 151 mm in length and had nearly 25 pairs of limbs for walking. References Cambrian trilobites {{trilobite-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
