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Igarkiellidae
''Carinopelta'' is a genus within Carinopeltidae, an extinct family (biology), family of Cambrian molluscs of uncertain position. It is in the superfamily Scenelloidea. Taxonomy The Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005), taxonomy of the Gastropoda by Bouchet & Rocroi, 2005Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdés Á. & Warén A. 2005. ''Classification and nomenclator of gastropod families''. Malacologia: International Journal of Malacology, 47(1-2). ConchBooks: Hackenheim, Germany. . ISSN 0076-2997. 397 pp. http://www.vliz.be/Vmdcdata/imis2/ref.php?refid=78278 categorizes Igarkiellidae in the superfamilia Scenelloidea within the Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)#Paleozoic molluscs of uncertain systematic position, Paleozoic molluscs of uncertain systematic position. This family has no subfamilies. According to P. Yu. Parkhaev in 2007, the family is within the superfamily Helcionelloidea Wenz, 1938 in the order He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scenelloidea
Scenelloidea is an extinct superfamily of paleozoic molluscs of uncertain position (Gastropoda, Helcionelloida, or Monoplacophora). Families Based on the taxonomy of the Gastropoda by Bouchet & Rocroi (2005) families in the Scenelloidea include: * † Scenellidae ''Scenella'' is an extinct genus of fossil invertebrate animal which is generally considered to be a mollusc; at various times it has been suggested that this genus belongs with the gastropods, the monoplacophorans, or the helcionellids, although ... * † Coreospiridae * † Igarkiellidae References * Miller, S. A. (1889). ''North American Geology and Palaeontology for the use of Amateurs, Students and Scientists''. Western Methodist Book Concern. Cincinnati. 664 p Prehistoric gastropods Mollusc superfamilies {{paleo-gastropod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxonomy Of The Gastropoda (Bouchet & Rocroi, 2005)
The taxonomy of the Gastropoda as it was revised in 2005 by Philippe Bouchet and Jean-Pierre Rocroi is a system for the scientific classification of gastropod mollusks (Gastropods are a taxonomic class of animals which consists of snails and slugs of every kind, from the land, from freshwater, and from saltwater). The paper setting out this taxonomy was published in the journal '' Malacologia''. The system encompasses both living and extinct groups, as well as some fossils whose classification as gastropods is uncertain. The Bouchet & Rocroi system was the first complete gastropod taxonomy that primarily employed the concept of clades, and was derived from research on molecular phylogenetics; in this context a clade is a "natural grouping" of organisms based upon a statistical cluster analysis. In contrast, most of the previous overall taxonomic schemes for gastropods relied on morphological features to classify these animals, and used taxon ranks such as order, superorder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helcionelloidea
Helcionellid or Helcionelliformes is an order of small fossil shells that are universally interpreted as molluscs, though no sources spell out why this taxonomic interpretation is preferred. These animals are first found about in the late Nemakit-Daldynian age, which is the earliest part of the Cambrian period. A single species persisted to the Early Ordovician. These fossils are component of the small shelly fossils (SSF) assemblages. These are thought to be early molluscs with rather snail-like shells, although they lack any compelling molluscan synapomorphies and thus may not belong to the group. They have been alleged to represent ancestors of the modern conchiferans, a group that includes all the well-known modern classes – gastropods, cephalopods and bivalves. They have also been considered to represent direct ancestors to the cephalopods. Parkhaev (2006, 2007) considers these animals to be crown-group gastropods. Previous to the 2006 classification by Parkhaev, helcio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helcionelloida
Helcionelloida is an extinct group of ancient molluscs (phylum Mollusca). These are the oldest known conchiferan molluscs, that is, they had a mineralised shell. Some members of this class were mistaken for Monoplacophorans. The class was erected by Peel in 1991. Anatomy These animals were torsion (gastropod), untorted and they had a coiled, cone-shaped shell. The majority of species were small (shells being about two millimeters in length and or diameter). Modern reconstructions depict them as resembling snails. The shells of some genera, particularly ''Yochelcionella'', also possessed a "Snorkel (anatomy), snorkel"-like opening which was most likely used for breathing. 2005 taxonomy The Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005), taxonomy of the Gastropoda by Bouchet & Rocroi, 2005Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdes A. & Warén A. 2005. ''Classification and nomenclator of gastropod families''. Malacologia: International ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelta
A ''peltast'' (, ) was a type of light infantry originating in Thrace and Paeonia and named after the kind of shield he carried.Williams, Mary Frances. "Philopoemen's special forces: Peltasts and a new kind of greek light-armed warfare (Livy 35.27) " ''Historia: Zeitschrift Für Alte Geschichte'' H. 3 (2004): 257-277. mentions the Thracian peltasts, while in the |
Igarkiella
''Igarkiella'' is an extinct genus of trilobite containing a single described species ''Igarkiella igarkaensis''. The species is known from fossils dating to 505 to 501 million years ago during the Cambrian Period The Cambrian ( ) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon. The Cambrian lasted 51.95 million years from the end of the preceding Ediacaran period 538.8 Ma (million years ago) to the beginning of the Ordovici .... The fossils were described from an outcrop of the Labaz Formations Saami Member along the Kulyumbe River in Krasnoyar, Russia. References Cambrian trilobites Anomocaridae Asaphida genera {{asaphida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homonym (biology)
In biology, a homonym is a name for a taxon that is identical in spelling to another such name, that belongs to a different taxon. The rule in the International Code of Zoological Nomenclature is that the first such name to be published is the senior homonym and is to be used (it is "valid name (zoology), valid"); any others are junior homonyms and must be replaced with new names. It is, however, possible that if a senior homonym is archaic, and not in "prevailing usage," it may be declared a ''nomen oblitum'' and rendered unavailable, while the junior homonym is preserved as a ''nomen protectum''. :For example: :*Georges Cuvier, Cuvier proposed the genus ''Echidna'' in 1797 for the echidna, spiny anteater. :*However, Johann Reinhold Forster, Forster had already published the name ''Echidna'' in 1777 for a genus of moray eels. :*Forster's use thus has Priority (biology), priority, with Cuvier's being a junior homonym. :*Johann Karl Wilhelm Illiger, Illiger published the replace ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triloba
''Triloba'' is a genus of gastropods belonging to the family Clausiliidae. The species of this genus are found in the Balkans The Balkans ( , ), corresponding partially with the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throug .... Species: *'' Triloba sandrii'' *'' Triloba talevi'' *'' Triloba thaumasia'' References {{Taxonbar, from=Q18592538 Clausiliidae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
