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Arionellus
''Arionellus'' Joachim Barrande, Barrande, 1850, is a disused name for a genus of trilobite. The name ''Arionellus'' was a replacement for ''Arionides'' Barrande, 1847, itself a replacement for ''Arion'' Barrande, 1846, which was preoccupied because André Étienne d'Audebert de Férussac, Férussac had already used it in 1819 for a genus of Arion (gastropod), slugs. ''Agraulos'' had already been proposed as replacement for ''Arion'' by Hawle and Corda in 1847, but Barrande unjustly considered it a homonym of Gulf Fritillary, ''Agraulis'', a butterfly named by Jean Baptiste Boisduval, Boisduval in 1836. The species of ''Arionellus'' have now been reassigned to the following genera. * ''A. bipunctatus'' Synonym (taxonomy), = ''Croixana, Croixana bipunctata'' * ''A. ceticephalus'' Synonym (taxonomy), = ''Agraulos, Agraulos ceticephalus'' * ''A. convexus'' Synonym (taxonomy), = ''Camaraspis, Camaraspis convexa'' * ''A. cylindricus'' Synonym (taxonomy), = ''Keithiella, Keithiella cyli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agraulos
''Agraulos'' is a genus of Solenopleuridae trilobites that lived during the Middle Cambrian in North America and Europe, particularly the Czech Republic. The genus was named by Hawle & Corda in 1847. Etymology ''Agraulos'' is derived from the Greek , "country woman", wife of Cecrops I, Kekrops. Type species Type species (designated by Miller 1889). ''Arion ceticephalus'' Barrande, 1846 from the Cambrian ''Eccaparadoxides pusillus'' Zone in the Skryje Member of the Buchava Formation, within the Skryje–Tyrovice Basin, Bohemia. Diagnosis Agraulinae with cephala generally domed; glabella isosceles-trapezoidal, i.e. with truncate front and base angles of the forward-converging lateral margins/flanks more than 15°; occipital ring mesially swollen backwards, with or without a medial node or spine; preglabellar field relatively long (sag.); posterolateral projection of fixigena narrow (tr.); librigenal spines short to long, with some deflected outwards. Thorax of up to 16 seg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tricrepicephalus
''Tricrepicephalus'' is an extinct genus of ptychopariid trilobites of the family Tricrepicephalidae with species of average size. Its species lived from 501 to 497 million years ago during the Dresbachian faunal stage of the late Cambrian Period. Fossils of ''Tricrepicephalus'' are widespread in Late Cambrian deposits in North America, but is also known from one location in South America. ''Tricrepicephalus'' has an inverted egg-shaped exoskeleton, with three characteristic pits in the fold that parallels the margin of the headshield just in front of the central raised area. The articulating middle part of the body has 12 segments and the tailshield carries two long, tubular, curved pygidial spines that are reminiscent of earwig's pincers that rise backwards from the plain of the body at approximately 30°. Description The outline of the exoskeleton of ''Tricrepicephalus'' is an inverted egg shaped though almost ovate, widest at the tip of the genal spines and 1.2× as long a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joachim Barrande
Joachim Barrande (11 August 1799 – 5 October 1883) was a French geologist and palaeontologist. He was particularly known for his work on trilobites, published in the ''Systéme Silurien de la Bohéme'' which he published in 22 parts. Trained under the school of Georges Cuvier, he opposed the evolutionary views of Charles Darwin. Life and career Barrande was born on the family estate at Saugues, Haute Loire, and he was educated in the École Polytechnique and École Nationale des Ponts et Chaussées at Paris. He attended the lectures of Georges Cuvier, Brongniart, Jussieu, Prevost, Serres, Auduoin, and de Blainville. He received the training of an engineer and was initially appointed engineer at Decize where he built an acqueduct over the Loire. While living in Decize he was introduced to Louis-Antoine de Bourbon, duke d'Angoulême and he was then appointed tutor to family of the duc de Bordeaux (afterwards known as the comte de Chambord), grandson of Charles X. He set ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strenuaeva
''Strenuaeva'' is a genus of Cambrian trilobite thought to show sexual dimorphism Sexual dimorphism is the condition where sexes of the same species exhibit different Morphology (biology), morphological characteristics, including characteristics not directly involved in reproduction. The condition occurs in most dioecy, di .... References Ptychopariida genera Cambrian trilobites Fossils of Sweden {{Ptychopariida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synonym (taxonomy)
In taxonomy, the scientific classification of living organisms, a synonym is an alternative scientific name for the accepted scientific name of a taxon. The Botanical nomenclature, botanical and Zoological nomenclature, zoological codes of nomenclature treat the concept of synonymy differently. * In nomenclature, botanical nomenclature, a synonym is a Binomial nomenclature, scientific name that applies to a taxon that now goes by a different scientific name. For example, Carl Linnaeus, Linnaeus was the first to give a scientific name (under the currently used system of scientific nomenclature) to the Norway spruce, which he called ''Pinus abies''. This name is no longer in use, so it is now a synonym of the current scientific name, ''Picea abies''. * In zoology, moving a species from one genus to another results in a different Binomial nomenclature, binomen, but the name is considered an alternative combination rather than a synonym. The concept of synonymy in zoology is reserved f ... [...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] |
Treatise On Invertebrate Paleontology
The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authored work of currently 55 volumes, written by more than 300 paleontologists, and covering every phylum, class, order, family, and genus of fossil and extant (still living) invertebrate animals. The prehistoric invertebrates are described as to their taxonomy, morphology, paleoecology, stratigraphic and paleogeographic range. However, taxa with no fossil record whatsoever have just a very brief listing. Publication of the decades-long ''Treatise on Invertebrate Paleontology'' is a work-in-progress; and therefore it is not yet complete: For example, there is no volume yet published regarding the post- Paleozoic era caenogastropods (a molluscan group including the whelk and periwinkle). Furthermore, when needed, previously published vol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
