What does and does not belong to each family is determined by a taxonomist. Similarly for the question if a particular family should be recognized at all. Often there is no exact agreement, with different taxonomists each taking a different position. There are no hard rules that a taxonomist needs to follow in describing or recognizing a family. Some taxa are accepted almost universally, while others are recognised only rarely.
History of the concept
Family, as a rank intermediate between order The Latin suffix -formes meaning "having the form of" is used for the scientific name of orders of birds and fishes, but not for those of mammals and invertebrates and genus In biology, a genus is a low-level taxonomic rank (a taxon) used in the classification of living and fossil organisms, which is an example of definition by genus and differentia. The term comes from Latin genus "descent, family, type, gender", cognate with Greek: γένος – genos, "race, stock, kin", is a relatively recent invention.
The taxonomic term familia was first used by French botanist Pierre Magnol Pierre Magnol was a French botanist. He was born in the city of Montpellier, where he lived and worked for the biggest part of his life. He eventually became Professor of Botany and Director of the Royal Botanic Garden of Montpellier and even held a seat in the Académie Royale des Sciences de Paris for a short while. Magnol is of lasting in his Prodromus historiae generalis plantarum, in quo familiae plantarum per tabulas disponuntur (1689) where he called families (familiae) the seventy-six groups of plants he recognised in his tables. The concept of rank at that time was still in statu nascendi, and in the preface to the Prodromus Magnol spoke of uniting his families into larger genera, which is far from how the term is used today.
Carolus Linnaeus Carl Linnaeus [a 2] (Latinized as Carolus Linnaeus [a 3], also known after his ennoblement as Carl von Linné , 23 May [O.S. 12 May] 1707 – 10 January 1778) was a Swedish botanist, physician, and zoologist, who laid the foundations for the modern scheme of binomial nomenclature. He is known as the father of modern taxonomy, and is also used the word familia in his Philosophia botanica (1751) to denote major groups of plants; trees A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to 6 m; some authors set a minimum of 10 cm trunk diameter, herbs In American English the initial "h" is normally silent: /ˈɜrb/.[Full citation needed] In standard British English the "h" is pronounced: /ˈhɜːb/ Also see American and British English pronunciation differences. In Canada, it is pronounced either with or without the "h", ferns A fern is any one of a group of about 12,000 species of plants. Unlike mosses, they have xylem and phloem . They have stems, leaves, and roots like other vascular plants. Ferns do not have either seeds or flowers (they reproduce via spores), palms Arecaceae or Palmae , the palm family, is a family of flowering plants, the only family in the monocot order Arecales. There are roughly 202 currently known genera with around 2600 species, most of which are restricted to tropical, subtropical, and warm temperate climates. Most palms are distinguished by their large, compound, evergreen leaves, etc. He used this term only in the morphological section of the book, discussing the vegetative and generative organs of plants. Subsequently, in French botanical publications, from Michel Adanson Michel Adanson was a French naturalist of Scottish descent's Familles naturelles des plantes (1763) and until the end of the 19th century, the word famille was used as a French equivalent of the Latin ordo (or ordo naturalis In botany, the phrase ordo naturalis, "natural order", was once used for what today is a family. Its origins lie with Carolus Linnaeus who used the word when he referred to natural units of plants. In his famous works the Systema Naturae and the Species Plantarum, arranged according to his artificial "Sexual system", Linnaeus). In nineteenth century works such as the Prodromus List of families in the Prodromus, arranged according to this de Candolle system. Note that this system was published well before there were internationally accepted rules for botanical nomenclature. Here, a family is indicated as "ordo". Terminations for families are not what they are now. Neither of these phenomena is a problem from a of Augustin Pyramus de Candolle Augustin Pyramus de Candolle also spelt Augustin Pyrame de Candolle was a botanist. The author abbreviation used in citing plant names he published is "DC." and the Genera Plantarum Note that this system was published well before there were internationally accepted rules for botanical nomenclature. It indicates a family by "ordo"; an order is indicated by "cohors" or "series" (in the third volume); in the first two volumes “series” refers to a rank above that of order. Terminations for of George Bentham George Bentham CMG FRS was an English botanist, characterized by Duane Isely as "the premier systematic botanist of the nineteenth century" and J.D. Hooker this word ordo was used for what now is given the rank of family.
In zoology, the family as a rank intermediate between order and genus was introduced by Pierre André Latreille Pierre André Latreille was a French entomologist. His works describing insects assigned many of the insect taxa still in use today in his Précis des caractères génériques des insectes, disposés dans un ordre naturel (1796). He used families (part of them not named) in some but not in all his orders of "insects" (which then included all arthropods An arthropod is an invertebrate animal having an exoskeleton , a segmented body, and jointed appendages. Arthropods are members of the Phylum Arthropoda (from Greek ἄρθρον arthron, "joint", and ποδός podos "foot", which together mean "jointed feet"), and include the insects, arachnids, crustaceans, and).
Since the beginning of the 20th century, however, the term has been consistently used in its modern sense. Its usage and characteristic ending of the names belonging to this category are governed by the various Nomenclature Codes The Nomenclature Codes are the various rulebooks that govern biological nomenclature, each in their own area. They are united in that they use names of the type Neotragus batesi and Caesalpinia gilliesii for species. To an end-user who only deals with names of species, with some awareness that species are assignable to families, it may not be.
See also
- Systematics Biological systematics is the study of the diversification of life on the planet Earth, both past and present, and the relationships among living things through time. Relationships are visualized as evolutionary trees . Phylogenies have two components, branching order (showing group relationships) and branch length (showing amount of evolution), the study of the diversity of life Life is a characteristic that distinguishes objects that have signaling and self-sustaining processes (biology) from those that do not, either because such functions have ceased (death), or else because they lack such functions and are classified as inanimate
- Cladistics Cladistics is a method of classifying species of organisms into groups called clades, which consist of 1) all the descendants of an ancestral organism and 2) the ancestor itself. For example, birds, dinosaurs, crocodiles, and all descendants of their most recent common ancestor form a clade. In the terms of biological systematics, a clade is a, the classification of organisms by their order of branching in an evolutionary tree
- List of families Categories: Lists of animals | Scientific classification | Zoological nomenclature, list of family names in the taxonomy Taxonomy is the practice and science of classification. The word finds its roots in the Greek τάξις, taxis and νόμος, nomos (meaning 'law' or 'science'). Taxonomy uses taxonomic units, known as taxa (singular taxon) of biology Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy
- Phylogenetics In biology, phylogenetics is the study of evolutionary relatedness among various groups of organisms , which is discovered through molecular sequencing data and morphological data matrices. The term phylogenetics is of Greek origin from the terms phyle/phylon (φυλή/φῦλον), meaning "tribe, race," and genetikos (γενετικός, the study of evolutionary relatedness among various groups of organisms
- Taxonomy Taxonomy is the practice and science of classification. The word finds its roots in the Greek τάξις, taxis and νόμος, nomos (meaning 'law' or 'science'). Taxonomy uses taxonomic units, known as taxa (singular taxon)
- Compare Family In human context, a family is a group of people affiliated by consanguinity, affinity, or co-residence. In most societies it is the principal institution for the socialization of children
- Virus classification Virus classification involves naming and placing viruses into a taxonomic system. Like the relatively consistent classification systems seen for cellular organisms, virus classification is the subject of ongoing debate and proposals. This is largely due to the pseudo-living nature of viruses, which are not yet definitively living or non-living. As
- protein family A protein family is a group of evolutionarily related proteins, and is often nearly synonymous with gene family. The term protein family should not be confused with family as it is used in taxonomy
- gene family A gene family is a set of genes with a known homology. They are generally biochemically similar. Genes are categorized this way into families, depending on shared nucleotide or protein sequences
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The Snapper
A man fascinated in the world of biology , he received his Bachelor's degree from Penn State University, Master's Degree from Shippensburg University, ...
