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Ophioderma Sp Classification Essay

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Ophioderma (fern)

Ophioderma (fern)

The genus Ophioderma are distinctive ferns (or fern-allies) in the family Ophioglossaceae. The same genus name is used for a genus of brittle-stars; for those, see Ophioderma .

Ophioderma is closely related to, and sometimes treated as a subgenus of, the genus Ophioglossum . It includes the genus formerly known as Cheiroglossa. Recent genetic analysis has indicated that the two genera should be treated as one, and Ophioderma has precedence by being validly published at an earlier date. The type species is Ophioderma pendula .

Species References
  • Hauk, Warren D. Clifford R. Parks and Mark W. Chasel. "Phylogenetic studies of Ophioglossaceae: evidence from rbcL and trnL-F plastid DNA sequences and morphology." Molecular Phylogenetics and Evolution. 28(1): 131-141. 2003.

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Look at other dictionaries:

Ophioderma — Scientific classification Kingdom: Animalia Phylum: Echinodermata Subphylum: Eleutherozoa … Wikipedia

Ophioderma palmata — Hand fern Scientific classification Kingdom: Plantae Division: Pteridophyta Class: Psilotopsida … Wikipedia

Ophioderma falcatum — Puapua moa Scientific classification Kingdom: Plantae Division … Wikipedia

Ophioderma pendulum — Old world adder s tongue Scientific classification Kingdom: Plantae Division … Wikipedia

Ophioglossaceae — Ophioglossum vulgatum Scientific classification … Wikipedia

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ADW: Ophioderma ensifera: CLASSIFICATION

To cite this page: Myers, P. R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2016. The Animal Diversity Web (online). Accessed at http://animaldiversity.org.

Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control.

This material is based upon work supported by the National Science Foundation Grants DRL 0089283, DRL 0628151, DUE 0633095, DRL 0918590, and DUE 1122742. Additional support has come from the Marisla Foundation, UM College of Literature, Science, and the Arts, Museum of Zoology, and Information and Technology Services.

The ADW Team gratefully acknowledges their support.

Classification Essay Research Paper 1ClassificationBy Gerald Abdesaken

Classification Essay Research Paper 1ClassificationBy Gerald Abdesaken

If we classify a group of random objects, then we can individualize each object.

thumbtack glass slide seed rubber band test tube paper clip pin pencil match penny wool strand plastic tie chalk file card

Kingdom1(School)Kingdom2(not school)File cardplastic tietest tubepennypencilthumbtackchalkseedpaper clipwool strandglass slidesafety pinrubber bandmatch

Phylum: WritingPhylum: Non-Writingpenciltest tubechalkglass slidefile cardpaper clip

A. Phylum Writing is School objects involved in writing, phylum Non-writing is school objects not used in writing.

Kingdom: School Non-School

Phylum: Writing Non-Writing

B. All objects in the same phylum are in the same kingdom.

Phylum: WritingNon-WritingEasily Mildly DifficultFlexib. Flexib. Flexib.

Items in Easily Flexible: Plastic tie, wool strand, and rubber band

C. Phylum: Easily Flexible

Class: RubberClass: Non-Rubber

Path for rubber band: Non-School- Easily Flexible- Rubber

Path for Wool Strand: Non-School- Easily Flexible- Non-Rubber

D. All items in the same class are in the same phylum, all items in the same phylum are in the same kingdom.

Scientists classify objects for 3 reasons. First, it shows relationships among organisms by grouping them together. Second, they use the genus and the species as the name for the organism. Third, the classification system is the same worldwide. We separated the objects from kingdoms, to phylum, then to class. Our kingdoms were the School and Non-School groups. If we were to add a cork and a nail, they would botch go to the Non-School kingdom.

Class: Stingers No Stingers Pointed Round Star Shaped

Each class does not necessarily have to have the same number of organisms or have the same number of classes for each phylum.

1. Student A separated this by environment, air or sea.

2. Student B separated this by eyes or no eyes.

3. All animals in the same phylum do not belong in the same class.

4. A. This group has backbones.

B. Can live in land and water.

5. Classes are more specific than kingdoms.

Classification Essay essays

MegaEssays.com Classification Essay

Poised motionless near the back door of the twentieth-century, we ponder memories of the past with a daydreaming stare. Before we turn off the lights and lock the doors of the twentieth-century, we take one last look through the century in which we were nurtured and our world lived for so long. The deep engraved scratches upon the walls of the twentieth century serve to jog our national memory to painful events as well as amazing accomplishments. After much reflective thought, we began to grasp how much our world has changed from when we first entered the front door of the twentieth century over ninety-nine years ago.
America and much of the world have been industrialized, modernized, urbanized, commercialized and de-christianized. We have thrown out perennial philosophies, centuries old, which reveal timeless insights into the ultimate meaning of life. Noble pursuits of the changeless purpose of life have been lost among a passionate desire to be like the pop cultural icons of our times. Our attitudes toward religious faith have surrounded our nation with a mordant atmosphere. While our technological ingenuity has made our technologies the envy of the world; and the phenomenon of our pop culture has created lucrative markets and has made our nation a capitalist wonderland; our inconsequential attitude toward religious faith has demoralized us and has lead to psychological and sociological degradation, and the embrace by our nation of psychosexual behavior. The one thing that remains constant in our ever-evolving society is the law of the farm.
TECHNOLOGY
The technological advances of the twentieth-century are astounding. From the primitive tools of antiquity to the most complex large-scale technological systems of the twentieth-century, our technology has affected global societies and has impacted the history of our culture right down to the present. Technology has characterized humankind since his earliest days when i.

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Hammurabi, said to be the greatest leader of Ancient Mesopotamia, laid out a set of laws which emphasizes retribution as a form of punishment ("an eye for an eye"). It is my belief that Hammurabi was a just ruler who took into consideration all things that affected his people. The Code of Hammurabi is very similar to our laws and yet it is completely different. Hammurabi�s set of laws heavily relies on retaliation which has no place in

the twenty-first century. But Code number 203, states that "If a free-born man strike the body of another free-born man or equal rank, he shall pay on gold mina," this reminds one of small claims court. But in a case it is different because a modern day society does not poke out the eye of an assailant, (number 196 "If a man put out the eye of another man, his eye shall be put out"). It is my belief

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Reproduction and early life history of the Sculpin Have you ever personally thought that fish were an interesting subject? Most people don’t. The majority of individuals consider fish ordinary, routine.

that Hammurabi was a just man but I would not choose to live under his code because of its harsh punishments. For instance, using the above example, what would happen if the eye incident was an accident? There are catch-22s and holes in the code even though it is well thought out. In conclusion, Hammurabi, said to be the greatest leader of Ancient Mesopotamia, laid out a set of laws which emphasizes retribution as a form of punishment ("an

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eye for an eye"). It is my belief that Hammurabi was a just ruler who took into consideration all things that affected his people.

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Ophioderma panamensis

Ophioderma panamensis

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TY - JOUR
T1 - Ophiuroidea (Echinodermata) from coral reefs in the Mexican Pacific
A1 - Granja–Fernández R, Herrero-Pérezrul M, López-Pérez R, Hernández L, Rodríguez-Zaragoza F, Jones R
A1 - Pineda-López R
Y1 - 2014
JF - ZooKeys
JA -
VL - 406
IS -
UR - http://dx.doi.org/10.3897/zookeys.406.6306
SP - 101
EP - 145
PB - Pensoft Publishers
M1 - Versioned wiki page: 2014-05-07, version 51621, http://species-id.net/w/index.php?title=Ophioderma_panamensis&oldid=51621. contributors (alphabetical order): Pensoft Publishers .

<ref name="Granja–Fernández2014ZooKeys406">< | author = Granja–Fernández R, Herrero-Pérezrul M, López-Pérez R, Hernández L, Rodríguez-Zaragoza F, Jones R, Pineda-López R
| title = Ophiuroidea (Echinodermata) from coral reefs in the Mexican Pacific
| journal = ZooKeys
| year = 2014
| volume = 406
| issue =
| pages = 101--145
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.406.6306
| url = http://www.pensoft.net/journals/zookeys/article/6306/abstract
| pmc =
| accessdate = 2016-07-10

Taxonavigation Name Description

Disk pentagonal (dd = 4.7 to 18.1 mm); dorsal and ventral side covered by fine, closely and rounded granulation. Radial shields naked, small and oval (Fig. 6D, E). Oral shields large and oval; wider than long. Adoral shields covered by granules. The madreporite is evident. Eight to ten oral papillae on each side of the jaw (Fig. 6F). Dorsal arm plates overlapping and rectangular with rounded edges; wider than long (Fig. 6B). Ventral arm plates oval and slightly overlapping; wider than long. Reduced lateral arm plates. Ten to 11 short and blunt arm spines; all spines are closely equal in size except the lowest which is longer. Two lanceolated tentacle scales (Fig. 6C). Four bursal slits per interradius (Fig. 6E). Disk brownish (Fig. 6A, D). Dorsal arm plates brown with dark and light bands (Fig. 6B).

Distribution

USA (California), Mexico, El Salvador, Nicaragua, Costa Rica, Panama, Peru, Colombia and Galapagos Islands (Clark HL 1940 [1]. Hooker et al. 2005 [2]. Neira and Cantera 2005 [3]. Alvarado et al. 2010 [4] ). In Mexico, from the Gulf of California (Baja California Sur, Sonora, Sinaloa), on the Pacific side of Baja California and Baja California Sur, Jalisco, Revillagigedo Islands, Guerrero and Oaxaca (Solís-Marín et al. 2005 [5]. Honey-Escandón et al. 2008 [6]. Granja-Fernández and López-Pérez 2011 [7]. 2012 [8] ). From intertidal to 40 m depth (Austin and Hadfield 1980 [9] ). In this study, Ophioderma panamensis was collected on coral reefs from Guerrero and Oaxaca, 4.9 to 9.1 m depth.

Remarks

Ophioderma panamensis was collected under rocks and on sand. Maluf (1988) [10] reported that this species may inhabit rocks, corals and algae. Adults and juveniles were found cohabiting together. Juveniles curled their arms over the dorsal side of the disk which is white in most individuals. This behavior camouflages juveniles on the white sand under the rocks. There are studies that report a wide variety of color patterns in Ophioderma panamensis (Ives 1889 [11]. Nielsen 1932 [12]. Ziesenhenne 1955 [13] ) but, we only found two variations in body colors: brown or grey. In addition, some specimens had white spots on the disk and all specimens presented bands on the dorsal side of the arms. Although some authors report a high incidence of subdivided dorsal arm plates (Ives 1889 [11]. Nielsen 1932 [12]. Ziesenhenne 1955 [13] ), we found only a few specimens with divided (in two segments) dorsal arm plates. Ophioderma panamensis was the most common ophiodermatid on the coral reefs from the Mexican Pacific.

Collected material

GUERRERO:Morro del Cerro Colorado (1 specimen, rock, 5.5 m, 31/05/2012, ICML-UNAM 10570); Zacatoso (3 specimens, rock, 9.1 m, 01/06/2012, ICML-UNAM 10580); El Yunque (3 specimens, rock, 5.5 m, 04/12/2010, ICML-UNAM 10409); Manzanillo (1 specimen, rock, 6.1 m, 30/05/2012, ICML-UNAM 10555); Morros de Potosí (2 specimens, rock, 06/03/2009, ICML-UNAM 10203); Palmitas (5 specimens, rock, 6.4 m, 20/11/2011, ICML-UNAM 10458).
OAXACA:El Zapatito (1 specimen, rock, 23/04/2009, ICML-UNAM 10226); Estacahuite (1 specimen, rock, 17/04/2008, MHN 005-4354); La Mina (1 specimen, rock, 17/04/2008, MHN 005-4343); Boquilla (7 specimens, sand, 02/11/2007, MHN 005-4397); Tijera (1 specimen, 23/11/2007, MHN 005-401); Dos Hermanas (1 specimen, rock, 08/08/2011, ICML-UNAM 10426); Harrys (4 specimens, rock, 9.1 m, 21/10/2011, ICML-UNAM 10438); Guerrilla (2 specimens, rock, 4.9 m, 18/05/2012, ICML-UNAM 10540).

Taxon Treatment
  • Granja–Fernández, R ; Herrero-Pérezrul, M ; López-Pérez, R ; Hernández, L ; Rodríguez-Zaragoza, F ; Jones, R ; Pineda-López, R ; 2014: Ophiuroidea (Echinodermata) from coral reefs in the Mexican Pacific ZooKeys , 406. 101-145. doi. 10.3897/zookeys.406.6306
Other References
  1. ↑ Clark H (1940) Notes on Echinoderms from the West Coast of Central America. Eastern Pacific Expeditions of the New York Zoological Society. Zoologica 25(3): 331-352.
  2. ↑ Hooker Y. Solís-Marín F. Lleellish M (2005) Echinoderms from Lobos de Afuera islands (Lambayeque, Peru). Revista Peruana de Biología 12(1): 77-82.
  3. ↑ Neira R. Cantera J (2005) Composición taxonómica y distribución de las asociaciones de equinodermos en los ecosistemas litorales del Pacífico Colombiano. Revista de Biología Tropical 53(3): 195-206.
  4. ↑ Alvarado J. Solís-Marín F. Ahearn C (2010) Echinoderm (Echinodermata) diversity in the Pacific coast of Central America. Marine Biodiversity 40: 45-56. doi: 10.1007/s12526-009-0032-5
  5. ↑ Solís-Marín F. Laguarda-Figueras A. Durán-González A. Ahearn C. Torres-Vega J (2005) Equinodermos (Echinodermata) del Golfo de California, México. Revista de Biología Tropical 53(3): 123-137.
  6. ↑ Honey-Escandón M. Solís-Marín F. Laguarda-Figueras A (2008) Equinodermos (Echinodermata) del Pacífico Mexicano. Revista de Biología Tropical 56(3): 57-73.
  7. ↑ Granja-Fernández M. López-Pérez R (2011) Nuevos registros de ofiuroideos (Echinodermata: Ophiuroidea) para localidades de Zihuatanejo (Guerrero) y Puerto Escondido (Oaxaca), Pacífico mexicano. Revista Mexicana de Biodiversidad 82: 1320-1323.
  8. ↑ Granja-Fernández M. López-Pérez R (2012) Biodiversidad de ofiuroideos (Echinodermata: Ophiuroidea) de Oaxaca y Chiapas. In: Sánchez A Chiappa-Carrara X Brito-Pérez R (Eds) Recursos Costeros del Sureste: tendencias actuales en investigación y estado del arte, 357–370.
  9. ↑ Austin W. Hadfield M (1980) Ophiuroidea: The Brittle Stars. In: Morris R Abbott D Haderlie E (Eds) Intertidal Invertebrates of California. Stanford University Press, Stanford, California, USA, 146–159.
  10. ↑ Maluf L (1988) Composition and distribution of the Central Eastern Pacific Echinoderms. Natural History Museum of Los Angeles County, Technical Reports 2: 1-242.
  11. ↑ 11.0 11.1 Ives J (1889) Variation in Ophiura panamensis and Ophiura teres. Proceedings of the Academy of Natural Sciences of Philadelphia 41: 76-77.
  12. ↑ 12.0 12.1 Nielsen E (1932) Ophiurans from the Gulf of Panama, California, and the Strait of Georgia. Videnskabelige Meddelelser fra Dansk Naturhistorisk Forening 91: 241-346.
  13. ↑ 13.0 13.1 Ziesenhenne F (1955) A review of the genus Ophioderma M. and T. In: Essays in the natural sciences in honor of Captain Allan Hancock on the occasion of his birthday july 26, 1955. (ed. not indicated), University of Southern California, Los Angeles, 185–201.
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Essay on Classification

Essay on Classification Essay on Classification

A major influence on the development of American scientific culture, Swiss-born Louis Agassiz (1807–73) was one of the great scientists of his day. A student of anatomist Georges Cuvier, Agassiz adapted his teacher's pioneering techniques of comparative anatomy to paleontology, and he rose to prominence as a distinguished systematist, paleontologist, and educator. Agassiz introduced science to ordinary citizens to an unprecedented degree; people around the world read his books, sent him specimens, and consulted his opinion.
Agassiz was also a staunch opponent of the theory of evolution, and he was among the last of the reputable scientists who continued to reject the concept after the publication of The Origin of the Species. All of nature bore testimony to a divine plan, Agassiz believed, and he could not reconcile himself to a theory that did not invoke God's design. Ironically, his 1851 Essay on Classification provided Darwin and other evolutionists with evidence from the fossil record to support the theory of natural selection.
A treasure of historically valuable insights that contributed to the development of evolutionary biology, this volume introduced the landmark contention that paleontology, embryology, ecology, and biogeography are inextricably linked in classifications that reveal the true relationships between organisms. Its emphasis on advanced and original work gave major impetus to the study of science directly from nature, and it remains a classic of American scientific literature.

Reprint of the Belknap Press of Harvard University Press, Cambridge, Massachusetts, 1962 edition.

Genealogical classification

Genealogical classification

(The first half of the lecture will consist of a video screening. There is a handout that helps you organise some of the information in the video.)

Ethnologue. the largest survey of languages today, first attempted a world-wide review in 1974 where 5,687 languages in referred to. The present edition gives a listing of 6,909 languages. (Click here to go to the Ethnologue website.) If we may be a little sceptical about some of these numbers (we might prefer to think of some of these �languages� as different varieties or dialects of a language), there are still very many languages in the world. How did language itself arise in the human species?

If we compare the human species to other animals, it is clearly significant that the human brain is relatively larger than that of other animals. Early Homo erectus in Africa (from about 1.7 to 1 million years BC) averaged 900 cc in brain size, but later Homo erectus specimens from 500,000 BC average 1,100�1,200 cc (cm�). Today, the average brain size is 1,400 cc. If we assume a correlation a correlation between brain size and intelligence, we might then say that language arose with increased intelligence. (The truth of the matter must be more complex than this though. People with small brains such as nanocephablic dwarfs still have language.)

Secondly, bi- pedalism (standing upright) must have been a factor as well. The hands are freed up for other actions, such as carrying, which in turn frees up the mouth from needing to perform this function. The development of a resonating chamber of about 1� inches (4 centimetres) above the larynx allowed for the development of various speech sounds.

Did language arise independently in different locations (this view is known as polygenesis)? Or are all languages ultimately evolved from a common ancestor (this view is known as monogenesis)?

We can do a small-scale study based on the instruction leaflet found in an Ikea self-assembled item of furniture.

VIKTIGT �FOLLOW ME� = MONTERINGSANVISNING

Kontrollera f�rst inneh�llet. Vad som ing�r ser du l�ngst ner p� n�sta side. Om n�got saknas eller du f�r problem, kontakta ditt varuhus.

IMPORTANT �FOLLOW ME� = ASSEMBLY INSTRUCTIONS

First check the contents. There is a list of contents on the left of the other side. If anything is missing, or you have a problem, contact your store.

WICHTIG �FOLLOW ME� = MONTIERANLEITUNG

Zuerst den Inhalt kontrollieren. Was dazu geh�rt, sehen Sie ganz links auf der n�chsten Seite. Sollte etwas fehlen oder sollten Probleme auftreten, setzen Sie sich bitte mit Ihrem Einrichtungshaus in Verbindung.

IMPORTANT �FOLLOW ME� = INSTRUCTIONS DE MONTAGE

Commencez par contr�ler le contenu en le comparant � liste page suivante, � l�extr�me gauche. Si quelque chose manquait ou que vous aviez un probl�me, contactez votre magasin.

BELANGRIJK �FOLLOW ME: = MONTEAGEAANWIJZING

Kontroleer eerst de inhoud. Uiterst links op de volgende bladzijde staat alles opgesomd. Als er iests ontbreekt of als je problemen krijgt, neem dan kontakt op met het woonwarenhuis.

�IMPORTANTE! �FOLLOW ME� - INSTRUCCIONES DE MONTAJE

Verifica primero el contenido. En la p�gina siguiente, a la izquierda, encontrar�s la descripci�n del contenido. Monta el mueble siguiendo el orden num�rico y las indicaciones de los dibujos. Si algo hace falta o si tienes dificultades, llama a tu tienda distribuidora. Al cabo de unas dos semanas debes apretar nuevamente todos los herrajes.

IMPORTANTE! �FOLLOW ME� = INSTRUZIONI DI MONTAGGIO

Controlla prima il contenuto. Il contenuto � segnato a sinistra nella pagina seguente. Monta il mobile secondo l�ordine del disegno. Se manca qualcosa o se sorgono dei dubbi, chiama il punto vendita. Ristringere tutte le viti dopo alcune settimane.

Based on this we can say a little about:

  • grammar (a bit)
  • lexis (more)
  • pronunciation (not much)


1. Consider the words for �important�, �instructions�, �first� and �contents�

  • Group A � French, Spanish and Italian
  • Group B � Swedish, German and Dutch
  • English seems problematic?

2. Consider the arrangement �assembly instructions� or �instructions for assembly�

  • Group A languages seem to prefer the noun + prepositional phrase construction
  • Group B languages seem to prefer the noun + noun construction.
  • from the point of view of the grammar of the noun phrase, English resembles the Group B languages more than the Group A languages

(a ) Hypothesis I: These were originally different languages, but because of contact between the different speakers, they were influenced by one another�s lexical items and grammatical structures.

(b ) Hypothesis II: These were originally one language, only they gradually became different. Perhaps people migrated, and the language changed in different ways: lexically, grammatically and phonologically.

Hypothesis I = centripetal force (convergence)

Hypothesis II = centrifugal force (divergence).

  • Cheating: the number one in the various languages:
  • en ( Sw ), un (Fr), ein (Ge), uno ( Sp ), un (It) and een (Du).
  • cf. onru (Tamil), hitotsu or ichi (Japanese), moja (Swahili), satu (Malay), yi (Mandarin Chinese) and yat (Cantonese Chinese).

we can imagine a common source for the �original� Group A and Group B languages.

  • Group B languages are usually called the Germanic or Teutonic group of languages
  • Other existing Germanic languages include Afrikaans (sometimes called Cape Dutch and spoken in southern Africa ), Danish (spoken in Denmark ), Icelandic (spoken in Iceland ), Norwegian (spoken mainly in Norway ) and Yiddish (the language of the Jews in Europe and America ).
  • The Group A languages are commonly called the Romance (= vernacular) languages.
  • These were originally all local or vernacular spoken versions of Latin (�vulgar Latin�) used throughout the Roman empire .
  • This group is called the Italic group of languages.
  • Other existing Italic (Romance) languages include Catalan (spoken mainly in some parts of Spain and France ), Portuguese (spoken mainly in Portugal and Brazil ) and Romanian (spoken mainly in Romania ).

The Germanic, the Italic group and other groups of languages form a larger family of languages. They call this the Indo-European family of languages

This website is interesting and males a similar point: http:// imgur.com/a/iVK8a

Whilst many had been aware of the similarities between and therefore the common source of the Romance languages (French, Spanish, Italian, Portuguese, etc.), it took a British judge Sir William Jones who was stationed in India to cast the net much wider and noticed similarities between apparently very different languages. He made systematic comparisons of the lexis and the grammar of languages like Greek, Latin, English and Sanskrit in an orderly fashion. This provided strong evidence for the existence of a so-called family of Indo-European languages, with an ultimate common source that was now extinct.

This is what he had to say:

The Sanscrit language, whatever be its antiquity, is of a wonderful structure; more perfect than the Greek, more copious than the Latin, and more exquisitely refined than either, yet bearing to both of them a stronger affinity, both in the roots of verbs and the forms of grammar, than could possibly have been produced by accident; so strong indeed, that no philologer could examine them all three, without believing them to have spring from some common source, which, perhaps, no longer exists: there is a similar reason, though not quite so forcible, for supposing that both the Gothick and the Celtick. though blended with a very different idiom, had the same origin with the Sanscrit. and the old Persian might be added to this family, if this were the place for discussing any question concerning the antiquities of Persia.

This eventually gave rise to a way of classifying languages, known as the genetic classification or the genealogical classification. The main metaphor that has been employed for talking about languages this way is the metaphor of the family tree (introduced by the German linguist Schleicher who thought of language as an organism that could grow and decay). This method compares different languages and use as many written remains that are available. Clearly, this kind of method of research would be more successful in places where more written records were available. Where there are gaps in the tree, reconstruction is possible (indicated by an asterisk below) by comparing cognate forms.

The table above shows that Italian, Spanish, French, Portuguese and Catalan are �sister languages�, derived from the parent language Latin. We can extend the diagram and show �daughter languages� for Sanskrit and Gothic for example as well. The name given to the �common source� is Proto-Indo-European or PIE. It is thought to have been spoken before 3000 BC and to have split up into different languages, so that by 2000 BC many of the linguistic differences had been established.

PIE speakers would seem to have lived in the steppe region of southern Russia around 4000 BC but subsequently migrated to other regions. Experts have been able to reconstruct some vocabulary items, including many items pertaining to family. There were also many words for in-laws, used only in relation to the bride � which suggests that the society must have been patriarchal in nature. There are also terms for domesticated animals, suggesting that there was farming activity. There are words for the body, tools and weapons, as well as abstract notions relating to law, religious belief and social status. Numerals were available up to at least 100.

There are no written records of PIE, which suggests that PIE was not a written language. PIE sounds therefore have had to be reconstructed. (Some suggest that PIE was a development from an even earlier language, sometimes called Nostratic ; here is a transcript of a programme �In Search of the First Language�. [If you go either of the links, click on your browser�s Back button to return here.]) If we examine the table above, it is clear that cognate words are pronounced differently in the various languages in the same family. When we examine a sufficient number of words, we will notice that the changes are not haphazard but often quite systematic. The 19th-century German philologist Jakob Grimm (1785�1863) worked out a sound law, known as Grimm�s law or �the first sound-shifting�, of how some Germanic consonants diverged from that of PIE. This is illustrated in the table below.

Aspirated voiced stops