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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'' Hawle & Corda 1847, is a genus of trilobites that lived during the Middle Cambrian in North America and Europe, particularly the Czech Republic. Etymology ''Agraulos'' is derived from the Greek , "country woman", wife of 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. Familial status Family SOLENOPLEURIDAE (Angelin, 1854). Subfamily AGRAULINAE Fletcher, 2017 emend. ''nom. transl. ex'' AGRAULIDAE Raymond. 1913. 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 ... [...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 490 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joachim Barrande
Joachim Barrande (11 August 1799 – 5 October 1883) was a French geologist and palaeontologist. Career Barrande was born at Saugues, Haute Loire, and educated in the École Polytechnique and École Nationale des Ponts et Chaussées at Paris. Although he had received the training of an engineer, his first appointment was that of tutor to the duc de Bordeaux (afterwards known as the comte de Chambord), grandson of Charles X, and when the king abdicated in 1830, Barrande accompanied the royal exiles to England and Scotland, and afterwards to Prague. Settling in that city in 1831, he became occupied in engineering works, and his attention was then attracted to the fossils from the Lower Palaeozoic rocks of Bohemia. The publication in 1839 of ''Murchison's Silurian System'' incited Barrande to carry on systematic researches on the equivalent strata in Bohemia. For ten years (1840–1850) he made a detailed study of these rocks, engaging workmen specially to collect fossils, and ... [...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 the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most ani .... References Ptychopariida genera Cambrian trilobites Fossils of Sweden {{Ptychopariida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synonym (taxonomy)
The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, 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 binomen, but the name is considered an alternative combination rather than a synonym. The concept of synonymy in zoology is reserved for two names at the same rank that refers to a taxon at that rank - for example, the name ''Papilio prorsa'' Linnaeus, 1758 is a junior synonym of ''Papilio levana'' Linnaeus, 1758, being names for different seasonal forms of the species now referred to as ''Araschnia l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. 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 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. phylogenetic analysis should c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treatise On Invertebrate Paleontology
The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 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, every so often, previously published volumes of the ''Treatise'' are revised. Evolution of the project Raymond C. Moor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
