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Tegopelte
''Tegopelte gigas'' (from the Greek , "tile", and , "leather-shield", referring to the shape of the dorsal body covering; gigas – from the Greek , "giant", due to the huge size of the animalTegopelte gigas. A giant trilobite-like arthropod The Burgess Shale.) is a species of large soft-bodied known from two specimens found in the of British Columbia, Canada. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conciliterga
Conciliterga is an extinct order of artiopod arthropods, exclusively known from the Middle Cambrian. They are placed within the clade Trilobitomorpha, which contains the trilobites and their closest relatives. Conciliterga is united by their partially or wholly fused tergites, which gives rise to their name (Conciliterga is composed of the Latin words ''concilio'' ("to unite") and ''tergum'' ("back")). Most members of this clade are elliptical in body shape, with 6-9 thoracic tergites, a head shield and a large tail shield in the members with incomplete tergite fusion. These members, which formerly comprised the order Helmetiida (which currently only contains ''Helmetia'', '' Rhombicalvaria'' and '' Kuamaia''), also have various other characteristics like a lack of axial region, rostral and pararostral plates on the head, and compound eyes near the rostral plate. In addition, they have essentially uniform biramous limbs running down the body with coarse endopods, alongside a pair ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trilobitomorpha
Artiopoda is a clade 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. Trilobites, in part due to abundance of findings owing to their mineralized exoskeletons, are by far the best recorded, diverse, and long lived members of the clade. Other members, which lack mineralised exoskeletons, are known mostly from Cambrian deposits. Description According to Stein and Selden (2012) artiopods are recognised by the possession of filiform antennulae, limbs with bilobate exopods (upper branches), with the proximal (closest to base of the limb) lobe being elongate and bearing a lamella, while the distal (further from the limb base) lobe is paddle-shaped and setiforous (bearing hair-or bristle like structures). The limb endopod (inner, leg-like branch) has seven podomeres/segments, with first four podomeres ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kuamaia
''Kuamaia'' is an Extinction, extinct genus of marine Cambrian arthropod belonging to Conciliterga, which is part of the broader group Artiopoda (which contains trilobites and their close relatives). Fossils of the type species ''K. lata'' were discovered in the Maotianshan Shales, Chengjiang biota. The other species in the genus, ''K. muricata'' has also been identified there, but neither species has been found elsewhere. Morphology ''Kuamaia'' has an oval dorsal exoskeleton (tergite) shape, with a gradual decline from the somewhat elevated medial axis of the animal to the exoskeleton edge. The surface appears smooth, with little space between tergites and low-profile pleural (lateral) spines. The cephalon (head shield) is trapezoid and wider than long. The thorax has 7 or 8 segments. The pygidium (tail) has 2 or 3 pairs of lateral spines and 1 terminal spine. The body length (excluding appendages) ranges between 1.4 cm and 7.9 cm for ''K. lata'' and 1.48 cm for ''K. muricata' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bailongia
''Bailongia'' is an extinct genus of arthropod known from a single species ''Bailongia longicaudata'' (''longicaudata'' from Latin: "long-tailed") found in the Cambrian Stage 4 aged Maotianshan Shales, Guanshan Biota of Yunnan, China. It was around 5mm long and had a large head shield, nine overlapping tapering tergites and a relatively elongate tailspine. It has been recovered in a relatively Basal (phylogenetics), basal position within Artiopoda, more derived than ''Squamacula'' or Protosutura, but outside Trilobitomorpha or Vicissicaudata. Phylogeny After Jiao et al. 2021. References Artiopoda Cambrian arthropods of Asia Cambrian China Paleontology in Yunnan Fossil taxa described in 2021 Cambrian genus extinctions {{Paleo-arthropod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helmetia
''Helmetia'' is an extinct genus of arthropod from the middle Cambrian (Wuliuan). Fossils of the type species ''Helmetia expansa'' have been found in the Burgess Shale of Canada. It is characterized by a pair of spines in front of its head. It is classified under Conciliterga, a group of trilobitomorph artiopod. Discovery Fossils of ''Helmetia'' are both rare and poorly known; the monotypic genus was described by Charles Doolittle Walcott in 1918 and has not been reexamined. Despite additional specimens had been discovered between 1975 and 1998, only the holotype was briefly mentioned in other subjects and the genus has been included in a number of cladistic analyses since 1990s. It was redescribed in 2025, revealing some details on its previously poorly known anatomy. As of 2025, there are 35 specimens of ''Helmetia expansa'' from Burgess Shale and 1 undefined specimen from the nearby Tulip Beds. A few specimens showing part of the animal's moulting process. A putative second ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Paleontology
The ''Journal of Paleontology'' is a peer-reviewed scientific journal covering the field of paleontology. It is managed and published by Cambridge University Press on behalf of the Paleontological Society. Indexing The ''Journal of Paleontology'' is indexed in: *BIOSIS Previews *Science Citation Index *The Zoological Record *GeoRef __NOTOC__ The GeoRef database is a bibliographic database that indexes scientific literature in the geosciences, including geology. Coverage ranges from 1666 to the present for North American literature, and 1933 to the present for the rest of th ... References Paleontology journals Academic journals established in 1927 Academic journals published by learned and professional societies Cambridge University Press academic journals Bimonthly journals Paleontological Society {{paleo-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burgess Shale
The Burgess Shale is a fossil-bearing deposit exposed in the Canadian Rockies of British Columbia, Canada. It is famous for the exceptional preservation of the soft parts of its fossils. At old (middle Cambrian), it is one of the earliest fossil beds containing soft-part imprints. The rock unit is a black shale and crops out at a number of localities near the town of Field in Yoho National Park and the Kicking Horse Pass. Another outcrop is in Kootenay National Park 42 km to the south. History and significance The Burgess Shale was discovered by palaeontologist Charles Walcott on 30 August 1909, towards the end of the season's fieldwork. He returned in 1910 with his sons, daughter, and wife, establishing a quarry on the flanks of Fossil Ridge. The significance of soft-bodied preservation, and the range of organisms he recognised as new to science, led him to return to the quarry almost every year until 1924. At that point, aged 74, he had amassed over 65,000 s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eoredlichia
''Eoredlichia'' is an extinct genus of trilobite of average to large size (up to long, or when including the spine on the ninth thorax segment pointing horizontally to the back, that itself equals the main body length). It lived during the early Cambrian (late Atdabanian) in the Chengjiang fauna of Yunnan, China, and in Australia and Thailand. ''Eoredlichia'' is compounded of the Greek (''eos'', dawn) and ''Redlichia'', a later but related genus, so it means "early ''Redlichia''". The species epithet ''intermedia'' means intermediate, indicating it is morphologically intermediate between other species. '' Eofallotaspis'' gives rise to ''Lemdadella'', and thence to ''Eoredlichia'' and the other Redlichiidae. Description Dorsal exoskeleton Like most early trilobites, ''Eoredlichia'' was very flat, was thinly calcified and had sickle-shaped eye ridges. Like all other Redlichiina it had opistoparian sutures, and a small tailshield or pygidium. The headshield or (cephalon) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olenoides
''Olenoides'' was a trilobite from the Cambrian period. Its fossils are found well-preserved in the Burgess Shale in Canada. It grew up to 10 cm (3.9 in) long. Etymology ''Olenoides'' – from ''Olenus'', in Greek mythology a man who, along with his wife Lethaea, was turned to stone. ''Olenus'' was used for a trilobite genus name in 1827; the suffix -''oides''(“resembling”) was added later. Discussion ''Olenoides'' followed the basic structure of all trilobites — a cephalon (head shield), a thorax with seven jointed parts, and finally a semicircular pygidium. Its antennae were long, and curved back along its sides. Its thin legs show that it was no swimmer, instead crawling along the sea floor in search of prey. This is also evidenced by fossil tracks that have been found. Conspicuous W-shaped wounds, often partially healed, on ''Olenoides'' specimens may be due to predation by ''Anomalocaris''. Its major characteristics are a large parallel-sided glabella, deep inter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kwanyinaspis
''Kwanyinaspis'' is a genus of arthropod from the Cambrian aged Chengjiang biota of Yunnan, China. It was described in 2005 based on a single specimen, ELI-2004001. Around 6 cm long, It has twelve trunk tergites with well developed posterior facing pleural spines, along with a tail spine and ventral eyes. In the original description, it was tenatively considered a member of Aglaspidida. However, later studies have considered it a trilobitomorph, and possibly the closest known relative of trilobite Trilobites (; meaning "three-lobed entities") are extinction, extinct marine arthropods that form the class (biology), class Trilobita. One of the earliest groups of arthropods to appear in the fossil record, trilobites were among the most succ ...s. References {{Taxonbar, from1=Q113427154 Artiopoda Prehistoric arthropod genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
