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Keurbos
''Keurbos'' is an extinct genus of enigmatic arthropods from the latest Ordovician (Hirnantian) Soom Shale of South Africa, a Lagerstätten fossil site within the larger Cederberg Formation. The genus contains a Monotypic taxon, single species, ''Keurbos susanae''. It is known from two specimens, one nearly complete and the other a partial body. These specimens, while preserving the internal organs extremely well, barely preserve the exoskeleton. At about long, ''Keurbos'' is a large arthropod. Its trunk has 46 segments that decrease in size toward the rear. Its exact phylogenetic placement in relation to other arthropods is Incertae sedis, uncertain due to the poor preservation of the head and limbs. ''Keurbos'' inhabited a cold ocean basin, having lived right after a major glaciation. Discovery and naming The ''Keurbos'' holotype specimen, C1002, is a well-preserved specimen missing the carapace, legs, and most of its head but preserving soft organs. The paratype, C2044, is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keurbos Paratype Fossil
''Keurbos'' is an extinct genus of enigmatic arthropods from the latest Ordovician (Hirnantian) Soom Shale of South Africa, a Lagerstätten fossil site within the larger Cederberg Formation. The genus contains a single species, ''Keurbos susanae''. It is known from two specimens, one nearly complete and the other a partial body. These specimens, while preserving the internal organs extremely well, barely preserve the exoskeleton. At about long, ''Keurbos'' is a large arthropod. Its trunk has 46 segments that decrease in size toward the rear. Its exact phylogenetic placement in relation to other arthropods is uncertain due to the poor preservation of the head and limbs. ''Keurbos'' inhabited a cold ocean basin, having lived right after a major glaciation. Discovery and naming The ''Keurbos'' holotype specimen, C1002, is a well-preserved specimen missing the carapace, legs, and most of its head but preserving soft organs. The paratype, C2044, is a less complete partial body ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2025 In Arthropod Paleontology
2025 in arthropod paleontology is a list of new arthropod fossil taxon, taxa, including arachnids, crustaceans, trilobites, and other arthropods (except insects, which have 2025 in paleoentomology, their own list) that were announced or binomial nomenclature, described, as well as other significant arthropod paleontology, paleontological discoveries and events which occurred in 2025. Chelicerates Arachnids Amblypygi Pseudoscorpiones Sarcoptiformes = Sarcoptiform research = * Klimov et al. (2025) revise ''Protospeleorchestes pseudoprotacarus'', ''Paraprotacarus hirsti'' and ''Palaeotydeus devonicus'' from the Devonian Rhynie chert (United Kingdom) and interpret them all as Synonym (taxonomy), junior synonyms of ''Protacarus, Protacarus crani'', assigned by the authors to the new family Protoacaridae within Endeostigmata; the authors also study the diversification timeline of acariform mites, and argue that the crown group of Acariformes originated during the Cambria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthropod
Arthropods ( ) are invertebrates in the phylum Arthropoda. They possess an arthropod exoskeleton, exoskeleton with a cuticle made of chitin, often Mineralization (biology), mineralised with calcium carbonate, a body with differentiated (Metamerism (biology), metameric) Segmentation (biology), segments, and paired jointed appendages. In order to keep growing, they must go through stages of moulting, a process by which they shed their exoskeleton to reveal a new one. They form an extremely diverse group of up to ten million species. Haemolymph is the analogue of blood for most arthropods. An arthropod has an open circulatory system, with a body cavity called a haemocoel through which haemolymph circulates to the interior Organ (anatomy), organs. Like their exteriors, the internal organs of arthropods are generally built of repeated segments. They have ladder-like nervous systems, with paired Anatomical terms of location#Dorsal and ventral, ventral Ventral nerve cord, nerve cord ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paratype
In zoology and botany, a paratype is a specimen of an organism that helps define what the scientific name of a species and other taxon actually represents, but it is not the holotype (and in botany is also neither an isotype (biology), isotype nor a syntype). Often there is more than one paratype. Paratypes are usually held in museum research collections. The exact meaning of the term ''paratype'' when it is used in zoology is not the same as the meaning when it is used in botany. In both cases however, this term is used in conjunction with ''holotype''. Zoology In zoological nomenclature, a paratype is officially defined as "Each specimen of a type series other than the holotype.", ''International Code of Zoological Nomenclature'' In turn, this definition relies on the definition of a "type series". A type series is the material (specimens of organisms) that was cited in the original publication of the new species or subspecies, and was not excluded from being type material ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Setae
In biology, setae (; seta ; ) are any of a number of different bristle- or hair-like structures on living organisms. Animal setae Protostomes Depending partly on their form and function, protostome setae may be called macrotrichia, chaetae, scales, or informally, hairs. The setal membrane is not cuticularized, so movement is possible. Annelid setae are stiff bristles present on the body. They allow earthworms and their relatives to attach to the surface and prevent backsliding during peristaltic motion. These hairs make it difficult to pull a worm straight from the ground. Setae in oligochaetes (the group including earthworms) are largely composed of chitin. They are classified according to the limb to which they are attached; for instance, notosetae are attached to notopodia; neurosetae to neuropodia. The setae on polychaete worms are referred to as chaeta due to their differing morphology. Crustaceans have mechano- and chemosensory setae. Setae are especially pres ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalon (arthropod Head)
The cephalon is the head section of an arthropod. It is a tagma, i.e., a specialized grouping of arthropod segments. The word cephalon derives from the Greek κεφαλή (kephalē), meaning "head". Insects In insects, ''head'' is a preferred term. The insect head consists of five segments, including three (the labial, maxillary and mandibular) necessary for food uptake, which are altogether known as the gnathocephalon and house the suboesophageal ganglion of the brain, as well as the antennal segment, and an ocular segment, as well as a non segmented fused section of the head where the archicerebrum is housed known as the acron. See also arthropod head problem. Chelicerates and crustaceans File:Cherax warsamsonicus - ZooKeys 660 151-167 (cropped).jpg, The crustacean '' Cherax warsamsonicus'' File:Phrynus asperatipes.jpg, The amplypygid chelicerate '' Phrynus asperatipes'' In chelicerates and crustaceans, the cephalothorax is derived from the fusion of the cephalo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overburden
In mining, overburden (also called waste or spoil) is the material that lies above an area that lends itself to economical exploitation, such as the rock, soil, and ecosystem that lies above a coal seam or ore body. Overburden is distinct from tailings, the material that remains after economically valuable components have been extracted from the generally finely milled ore. Overburden is removed during surface mining, but is typically not contaminated with toxic components. Overburden may also be used to restore an exhausted mining site during reclamation. Interburden is material that lies between two areas of economic interest, such as the material separating coal seams within strata.Peng, Syd S. (1986) ''Coal Mine Ground Control'' (2nd edition), Wiley, New York, page 303, Analogous uses Overburden is also used for all soil and ancillary material above the bedrock horizon in a given area. By analogy, overburden is also used to describe the soil and other material that lies a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Specific Name (zoology)
In zoological nomenclature, the specific name (also specific epithet, species epithet, or epitheton) is the second part (the second name) within the scientific name of a species (a binomen). The first part of the name of a species is the name of the genus or the generic name. The rules and regulations governing the giving of a new species name are explained in the article species description. For example, the scientific name for humans is ''Homo sapiens'', which is the species name, consisting of two names: ''Homo'' is the " generic name" (the name of the genus) and ''sapiens'' is the "specific name". Etymology Historically, ''specific name'' referred to the combination of what are now called the generic and specific names. Carl Linnaeus, who formalized binomial nomenclature, made explicit distinctions between specific, generic, and trivial names. The generic name was that of the genus, the first in the binomial, the trivial name was the second name in the binomial, and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. Phylogeneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Aldridge
Richard John Aldridge (16 December 1945 – 4 February 2014) was a British palaeontologist and academic, who was Bennett Professor of Geology at the University of Leicester. Academic career Aldridge's career began at Southampton University before moving to a temporary lectureship at University College London. He then joined the University of Nottingham where he remained until 1989, having reached the rank of Reader in Palaeontology. Following the Oxburgh Review of Earth Sciences, he moved to the University of Leicester. He served two terms as Head of Department, and was F.W. Bennett Professor of Geology from 2002 until he retired in 2011. Aldridge's research has been focused primarily on the conodont biostratigraphyAldridge, R. J. 1972. Llandovery conodonts from the Welsh Borderland. Bulletin of the British Museum (Natural History), ''Geology'' 22: 125-231Aldridge, R. J. 1975. The stratigraphic distribution of conodonts in the British Silurian. ''Journal of the Geological Societ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
