species

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species

 [spe´shēz]
a taxonomic category subordinate to a genus (or subgenus) and superior to a subspecies or variety; composed of individuals similar in certain morphologic and physiologic characteristics.
type species the original species from which the description of the genus is formulated.

spe·cies

, pl.

spe·cies

(spē'shēz), Avoid the mispronunciation spē'sēz. The singular and plural forms of this word are both species. Specie is not the singular of species. A species name begins with a lowercase letter and is printed in italic type: [Branhamella] catarrhalis, [Pneumocystis] jiroveci. When a species is unknown or not identified, the abbreviation sp., in roman type, is used: Rhizpus sp. (one unidentified species of Rhizopus), Bacteroides spp. (more than one unidentified species). Avoid slang abridgments of species names such as "H. flu" (Haemophilus influenzae).
1. A biologic division between the genus and a variety or the individual; a group of organisms that generally bear a close resemblance to one another in the more essential features of their organization, and breed effectively producing fertile progeny.
2. A class of pharmaceutical preparations consisting of a mixture of dried plants, not pulverized, but in sufficiently fine division to be conveniently used in the making of extemporaneous decoctions or infusions, as a tea.
[L. appearance, form, kind, fr. specio, to look at]

species

/spe·cies/ (spe´shēz) a taxonomic category subordinate to a genus (or subgenus) and superior to a subspecies or variety.
type species  the original species from which the description of the genus is formulated.

species

(spē′shēz, -sēz)
n. pl. species
1. Biology A group of closely related organisms that are very similar to each other and are usually capable of interbreeding and producing fertile offspring. The species is the fundamental category of taxonomic classification, ranking below a genus or subgenus. Species names are represented in binomial nomenclature by an uncapitalized Latin adjective or noun following a capitalized genus name, as in Ananas comosus, the pineapple, and Equus caballus, the horse.
2. Chemistry A set of atoms, molecules, ions, or other chemical entities that possess the same distinct characteristics with respect to a chemical process or measurement.

species (Sp)

[spē′sēz, spē′shēz] pl. species (sp., spp.)
Etymology: L, form
the category of living things below genus in rank. A species is a genetically distinct group of demes that share a common gene pool and are reproductively isolated from all other such groups. See also deme, genus.

spe·cies

, pl. species (spē'shēz)
1. A biologic division between the genus and a variety or the individual; a group of organisms that generally bear a close resemblance to one another in the more essential features of their organization, and that breed effectively, producing fertile progeny.
2. A class of pharmaceutical preparations consisting of a mixture of dried plants, not pulverized, but in sufficiently fine division to be conveniently used in the making of extemporaneous decoctions or infusions, as a tea.
[L. appearance, form, kind, fr. specio, to look at]

species

the lowest (taxonomic) grouping of animals or plants which, at least potentially, forms an interbreeding array of populations unable to breed freely with other sorts of animal or plant. Thus members of a species have breeding compatibility and produce fertile offspring. The species is the only natural unit (taxon) of CLASSIFICATION. It is usually recognized on the basis of morphological characters (a MORPHOSPECIES), but different species can be morphologically identical (sibling species), for example, Drosophila pseudoobscura and D. persimilis exhibit behavioural differences leading to REPRODUCTIVE ISOLATION. see BINOMIAL NOMENCLATURE. For asexually reproducing organisms, such as bacteria, a precise definition of species has not been universally formulated and agreed. Generally individuals displaying a high degree of similarity based on biochemical, genetic and morphological characteristics, for example, are grouped as species.

species

a taxonomic category subordinate to a genus (or subgenus) and superior to a subspecies or variety; composed of individuals similar in certain morphological and physiological characteristics, the important one of which is that they are capable of interbreeding to produce fertile and viable offspring.

species difference
the difference between species in their response to therapeutic agents, poisons and infections due to physical, biochemical, immunological differences.
species specialist
a veterinarian who specializes in the diseases and management of an individual animal species.
type species
the original species from which the description of the genus is formulated.
References in periodicals archive ?
Species differences in response to diethylhexylphthalate: suppression of apoptosis, induction of DNA synthesis and peroxisome proliferator activated receptor alpha-mediated gene expression.
Therefore, we feel it is unlikely that species differences in sexual dimorphism for metabolic rate can be explained by differences in the reproductive state of the females.
In the light of recent research, however, this extreme form of the continuity strategy has led to a degree of conceptual confusion in both accounting for species differences in behavior and in defining exactly what a "difference" entails.
Species differences are most pronounced when differences in types of stem damage or in stem and branch damage are considered.
An important question is whether species differences in acid tolerance are independent of variation in body mass and developmental stage.
The primary factor is likely structural differences for most species because migrants must adapt to a wide variety of plant species along their migration route, and species differences between islands were primarily based on breeding habitat structure.
of Florida) works from his own significant research as well as that of others to explain current work on the need for pesticides and their pattern of use, the formulation of pesticides, laws and regulations, classifications of pesticides, evaluations of their toxicity, methods of introducing pesticides, the mode of their action, principles of pesticide metabolism, species differences and other phenomena associated with the metabolism of xenobiotics, insecticide resistance, and the influence of pesticides on the environment.
Species differences in parasite prevalence were not due to difference in sex, age, adult body mass, incubation period, breeding habitat, or plumage colorfulness.
Knott notes that researchers have already found species differences even among the great apes, such as more elaborate tool use in chimpanzees than in orangutans.
Parts 6 and 7 cover the inter-individual and intra-individual factors that influence drug metabolism, starting with an introduction to evolutionary events leading to species differences in the metabolism of xenobiotics and to polymorphisms within a particular species.
A crucial question in comparative cognitive research is whether these species differences in cognitive abilities correlate with differences in ecological and social factors.
We asked whether bird species differences in raid attendance were correlated with bivouac-checking frequency.