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Oestophora Barbella
''Oestophora'' is a genus of air-breathing land snail, a terrestrial gastropod mollusk in the family Trissexodontidae. Distribution The distribution of the genus ''Oestophora'' includes western Iberian peninsula, north Africa and the Azores. Description The shell is ribbed, with rounded or keeled whorls. The apertural margin is reflected and thickened. Reproductive system: There is no flagellum, no penial papilla. There is one small dart sac, one longer accessory sac separated from vaginal walls and vagina with 3 simple and long accessory (mucus) glands. The number of haploid chromosomes is 30.Prieto C. E., Puente A. I, Altonaga K. & Gomez J. (1993). "Genital morphology of ''Caracolina lenticula'' (Michaud, 1831), with a new proposal of classification of helicodontoid genera (Pulmonata: Hygromioidea)". '' Malacologia'' 35(1)6377page 7374. Species Species within the genus ''Oestophoa'' include: * ''Oestophora barbula'' (Rossmässler, 1838) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animalia
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, annelids and molluscs, and the deuterostomes, containing the echinode ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iberian Peninsula
The Iberian Peninsula (), ** * Aragonese and Occitan: ''Peninsula Iberica'' ** ** * french: Péninsule Ibérique * mwl, Península Eibérica * eu, Iberiar penintsula also known as Iberia, is a peninsula in southwestern Europe, defining the westernmost edge of Eurasia. It is principally divided between Spain and Portugal, comprising most of their territory, as well as a small area of Southern France, Andorra, and Gibraltar. With an area of approximately , and a population of roughly 53 million, it is the second largest European peninsula by area, after the Scandinavian Peninsula. Name Greek name The word ''Iberia'' is a noun adapted from the Latin word "Hiberia" originating in the Ancient Greek word Ἰβηρία ('), used by Greek geographers under the rule of the Roman Empire to refer to what is known today in English as the Iberian Peninsula. At that time, the name did not describe a single geographical entity or a distinct population; the same name was us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oestophora Dorotheae
''Oestophora'' is a genus of air-breathing land snail, a terrestrial gastropod mollusk in the family Trissexodontidae. Distribution The distribution of the genus ''Oestophora'' includes western Iberian peninsula, north Africa and the Azores. Description The shell is ribbed, with rounded or keeled whorls. The apertural margin is reflected and thickened. Reproductive system: There is no flagellum, no penial papilla. There is one small dart sac, one longer accessory sac separated from vaginal walls and vagina with 3 simple and long accessory (mucus) glands. The number of haploid chromosomes is 30.Prieto C. E., Puente A. I, Altonaga K. & Gomez J. (1993). "Genital morphology of ''Caracolina lenticula'' (Michaud, 1831), with a new proposal of classification of helicodontoid genera (Pulmonata: Hygromioidea)". '' Malacologia'' 35(1)6377page 7374. Species Species within the genus ''Oestophoa'' include: * '' Oestophora barbula'' (Rossmässler, 1838) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oestophora Calpeana
''Oestophora'' is a genus of air-breathing land snail, a terrestrial gastropod mollusk in the family Trissexodontidae. Distribution The distribution of the genus ''Oestophora'' includes western Iberian peninsula, north Africa and the Azores. Description The shell is ribbed, with rounded or keeled whorls. The apertural margin is reflected and thickened. Reproductive system: There is no flagellum, no penial papilla. There is one small dart sac, one longer accessory sac separated from vaginal walls and vagina with 3 simple and long accessory (mucus) glands. The number of haploid chromosomes is 30.Prieto C. E., Puente A. I, Altonaga K. & Gomez J. (1993). "Genital morphology of ''Caracolina lenticula'' (Michaud, 1831), with a new proposal of classification of helicodontoid genera (Pulmonata: Hygromioidea)". '' Malacologia'' 35(1)6377page 7374. Species Species within the genus ''Oestophoa'' include: * '' Oestophora barbula'' (Rossmässler, 1838) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oestophora Barrelsi
''Oestophora'' is a genus of air-breathing land snail, a terrestrial gastropod mollusk in the family Trissexodontidae. Distribution The distribution of the genus ''Oestophora'' includes western Iberian peninsula, north Africa and the Azores. Description The shell is ribbed, with rounded or keeled whorls. The apertural margin is reflected and thickened. Reproductive system: There is no flagellum, no penial papilla. There is one small dart sac, one longer accessory sac separated from vaginal walls and vagina with 3 simple and long accessory (mucus) glands. The number of haploid chromosomes is 30.Prieto C. E., Puente A. I, Altonaga K. & Gomez J. (1993). "Genital morphology of ''Caracolina lenticula'' (Michaud, 1831), with a new proposal of classification of helicodontoid genera (Pulmonata: Hygromioidea)". '' Malacologia'' 35(1)6377page 7374. Species Species within the genus ''Oestophoa'' include: * '' Oestophora barbula'' (Rossmässler, 1838) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AnimalBase
AnimalBase is a project brought to life in 2004 and is maintained by the University of Göttingen, Germany. The goal of the AnimalBase project is to digitize early zoological literature, provide copyright-free open access to zoological works, and provide manually verified lists of names of zoological genera and species as a free resource for the public. AnimalBase contributed to opening up the classical taxonomic literature, which is considered as useful because access to early literature (especially for the late 18th century) can be difficult for researchers who need the old sources for their taxonomic research. AnimalBase data are public domain. The public use of AnimalBase data is not restricted or conditioned.AnimalBase Project Group, 2005-2010. AnimalBase. Early zoological literature online. World wide web electronic publication http://www.animalbase.uni-goettingen.de accessed 30 July 2010. AnimalBase covers all zoological disciplines. In the field of biodiversity informatics A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oestophora Barbula
''Oestophora'' is a genus of air-breathing land snail, a terrestrial gastropod mollusk in the family Trissexodontidae. Distribution The distribution of the genus ''Oestophora'' includes western Iberian peninsula, north Africa and the Azores. Description The shell is ribbed, with rounded or keeled whorls. The apertural margin is reflected and thickened. Reproductive system: There is no flagellum, no penial papilla. There is one small dart sac, one longer accessory sac separated from vaginal walls and vagina with 3 simple and long accessory (mucus) glands. The number of haploid chromosomes is 30.Prieto C. E., Puente A. I, Altonaga K. & Gomez J. (1993). "Genital morphology of ''Caracolina lenticula'' (Michaud, 1831), with a new proposal of classification of helicodontoid genera (Pulmonata: Hygromioidea)". '' Malacologia'' 35(1)6377page 7374. Species Species within the genus ''Oestophoa'' include: * '' Oestophora barbula'' (Rossmässler, 1838) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malacologia
''Malacologia'' is a peer-reviewed scientific journal in the field of malacology, the study of mollusks. The journal publishes articles in the fields of molluscan systematics, ecology, population ecology, genetics, molecular genetics, evolution, and phylogenetics. The journal specializes in publishing long papers and monographs. The journal publishes at least one, sometimes two, volumes of about 400 pages per year, which may consist of 1 or 2 issues. According to the ''Journal Citation Reports,'' its 2019 impact factor is 13.5. This ranks ''Malacologia'' 1st out of 145 listed journals in the category "Zoology". The journal started publication in 1962. See also *''Archiv für Molluskenkunde'' *''Basteria'' *''Journal of Conchology'' *''Journal of Molluscan Studies The ''Journal of Molluscan Studies'' is the peer-reviewed scientific journal of the Malacological Society of London, covering research in malacology. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chromosome
A chromosome is a long DNA molecule with part or all of the genetic material of an organism. In most chromosomes the very long thin DNA fibers are coated with packaging proteins; in eukaryotic cells the most important of these proteins are the histones. These proteins, aided by chaperone proteins, bind to and condense the DNA molecule to maintain its integrity. These chromosomes display a complex three-dimensional structure, which plays a significant role in transcriptional regulation. Chromosomes are normally visible under a light microscope only during the metaphase of cell division (where all chromosomes are aligned in the center of the cell in their condensed form). Before this happens, each chromosome is duplicated ( S phase), and both copies are joined by a centromere, resulting either in an X-shaped structure (pictured above), if the centromere is located equatorially, or a two-arm structure, if the centromere is located distally. The joined copies are now called si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haploid
Ploidy () is the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes. Sets of chromosomes refer to the number of maternal and paternal chromosome copies, respectively, in each homologous chromosome pair, which chromosomes naturally exist as. Somatic cells, tissues, and individual organisms can be described according to the number of sets of chromosomes present (the "ploidy level"): monoploid (1 set), diploid (2 sets), triploid (3 sets), tetraploid (4 sets), pentaploid (5 sets), hexaploid (6 sets), heptaploid or septaploid (7 sets), etc. The generic term polyploid is often used to describe cells with three or more chromosome sets. Virtually all sexually reproducing organisms are made up of somatic cells that are diploid or greater, but ploidy level may vary widely between different organisms, between different tissues within the same organism, and at different stages in an organism's life cycle. Half ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Love Dart
A love dart (also known as a gypsobelum, shooting darts, or just as darts) is a sharp, calcareous or chitinous dart which some hermaphroditic land snails and slugs create. Love darts are both formed and stored internally in a dart sac. These darts are made in sexually mature animals only, and are used as part of the sequence of events during courtship, before actual mating takes place. Darts are quite large compared to the size of the animal: in the case of the semi-slug genus ''Parmarion'', the length of a dart can be up to one fifth that of the semi-slug's foot. The process of using love darts in snails is a form of sexual selection. Prior to copulation, each of the two snails (or slugs) attempts to "shoot" one (or more) darts into the other snail (or slug). There is no organ to receive the dart; this action is more analogous to stabbing, or to being shot with an arrow or flechette. The dart does not fly through the air to reach its target, but is "fired" as a contact shot. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reproductive System Of Gastropods
The reproductive system of gastropods (slugs and snails) varies greatly from one group to another within this very large and diverse taxonomic class of animals. Their reproductive strategies also vary greatly, see Mating of gastropods. In many marine gastropods there are separate sexes (male and female); most terrestrial gastropods however are hermaphrodites. Courtship is a part of the behaviour of mating gastropods. In some families of pulmonate land snails, one unusual feature of the reproductive system and reproductive behavior is the creation and utilization of love darts, the throwing of which has been identified as a form of sexual selection. Gastropods are defined as snails and slugs, belonging to a larger group called Molluscs. Gastropods have unique reproductive systems, varying significantly from one taxonomic group to another. They can be separated into three categories: marine, freshwater, and land. Reproducing in marine or freshwater environments makes getting s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
