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Topic: Caviomorpha

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	Caviomorpha - Wikipedia, the free encyclopedia
		Caviomorpha is the name for the rodent infraorder or parvorder that unites all South American hystricognaths.
		This is supported by molecular results, which suggest that the Phiomorpha (as restricted to Bathyergidae, Petromuridae, and Thryonomyidae) are sister taxa to the Caviomorpha.
		The "Franimorpha" were once proposed as a potential North American rodent group that may represent an ancestor to the Caviomorpha, but most modern researchers consider franimorphs to have been protrogomorphous instead of hystricomorphous.
	en.wikipedia.org /wiki/Caviomorpha (740 words)

	Hystricognathi
		The lack of infraorbital plate to which to anchor the masseter lateralis and the relative size of the infraorbital foramen distinguishes hystricognathi from the Sciuromorpha.
		There are 18 families within the Hystricognathi, divisible into a dual classification of infraorders, the Phiomorpha and the Caviomorpha.
		The Caviomorpha are mostly native to South America, with a few species in North America, while the Phiomorpha occur in the Old World.
	www.paleorama.com /Mammals-H/Hystricognathi.php (145 words)

	Comparative Placentation
		This group was originally defined by Tullberg in 1899, but its validity was later doubted because of the disjunct distribution into a South American group or Caviomorpha on the one hand (including the North American tree porcupines), and the African hystricognaths on the other (with a few species in Europe and Asia).
		From the mid -1980's on, phylogenetic studies respecting characters of fetal membranes and placentation support the monophyletic hypothesis of Hystricognathi (Luckett, 1985) and have been accepted by former critics of the concept (Wood, 1985).
		Nedbal et al., 1994, Huchon et al., 2000), but the relationships within the group are not that well resolved, and data are often not congruent.
	medicine.ucsd.edu /cpa/degu.htm (3451 words)

	Controversy
		Rabbits used to be classed as rodents, but research into their DNA showed they in fact belonged to a separate order and a new class was created for them, the lagomorphs.
		If this is true, then Rodentia and Caviomorpha are not the same clade, and so caviomorphs (or even hystricomorphs) should be elevated into their own, distinct order.
		In a review, a brief statement was made claiming that "No morphologist has yet come forward in support of the new order Caviomorpha, and other molecular data hardly favours it." Although negative, this statement was not based on any singular piece of research and is highly subjective.
	www.btinternet.com /~p.long/degutopia/degucontrov.htm (1572 words)

	Comparative Placentation
		The trophoblast is strongly cytokeratin positive and resembles closely the picture shown in the pacarana (see Chapter on Pacarana).
		A very similar picture is found in the guinea pig, and it is perhaps characteristic of Caviomorpha in general (see Nanaev et al., 1995).
		Luckett (1980) suggested that most caviomorph rodents studied form the amnionic cavity by folding, a point also supported by Roberts and Perry (1974).
	medicine.ucsd.edu /cpa/nutria.html (5054 words)

	Delightful Degus - General Infornation
		It is painful for your degu, as well as they will not be as balanced, and quite unsightful for you.
		They are mammals and are currently being classified as being order rodentia (rodents) sub order caviomorpha (cavies), family octodontodae (octodont rodents).
		However, since they do have many physical characteristics that are different from rabbits, many also feel that they should be classified as a new order separate from the rodents and lagomorphs.
	www.angelfire.com /on2/degus/info.html (662 words)

	Baruch Undergrad. Honors [2000]: Marcin, R. Comparative: Cranial Anatomy of Rattus...
		The guinea pig (Cavia porcellus), Suborder Caviomorpha (Guinea pigs and their relatives), has been classified as a New World (the Americas) hystricomorph rodent for about two centuries.
		Both phylogenetic and paleogeographic data were taken into consideration when Caviomorpha were named a distinct clade or branch that is separated from the Old World hystricomorph clade.
		The purpose of this paper is to describe the cranial anatomy of Proechimys (Caviomorpha, Echimyidae), a relative of the Guinea pig.
	newman.baruch.cuny.edu /digital/2000/honors/marcin_2000/marcin_2000.htm (5529 words)

	Abstrcts - Volumen 4 Número 2
		Based on an endocranial cast, the brain of a Caviomorpha, Family Cephalomyidae, Gen. et sp.
		This specimen was collected in beds of the Trelew member of the Sarmiento Formation (Colhuehuapian Land-mammal Age) on the barranca south of the Río Chubut, near Gaiman, Chubut.
		Palabras clave: Paleoneurología, Rodentia, Caviomorpha, Cephalomyidae, Argentina, Chubut, Edad mamífero Colhuehuapense.
	www.cricyt.edu.ar /mn/indice/4_2_abstract.htm (2873 words)

	Untitled Document (Site not responding. Last check: 2007-11-02)
		A peculiar octodontoid (Rodentia, Caviomorpha) with terraced molars from the Lower Miocene of Patagonia (Argentina)
		Such a diet is not known within the Caviomorpha.
		This terraced design is understood as a primitive feature, but the upper molars of this species have a derived tetralophodont pattern with the posteroloph (or the metaloph?) absent or highly reduced.
	www.vertpaleo.org /jvp/16-297-302.html (202 words)

	Your group:Fossil Groups: SciComms 05-06: Earth Sciences
		This is because they tend to inhabit environments that comprise wide open spaces and are thus vulnerable to predation.
		Their sensory organs are placed high on their head so that they can still see, hear and breathe whilst swimming.
		Caviomorpha also inhabit mountainous, forested, desert and stream habitats with arboreal, aquatic, and ground dwelling species such as the naked mole rat.
	palaeo.gly.bris.ac.uk /Palaeofiles/Fossilgroups/Placent/ER.html (473 words)

	OU-COM Department of Biomedical Sciences -- Audrone Biknevicius
		Biomechanical scaling of limb bones and differential limb use in caviomorph rodents.
		Body size in Amblyrhiza inundata (Rodentia; Caviomorpha) an extinct megafaunal rodent of the Anguilla Bank, West Indies: Estimates and implications.
		Structure of the mandibular corpus and its relationship to feeding behaviors in extant carnivorans.
	www.oucom.ohiou.edu /dbms-biknevicius/publications.htm (413 words)

	Pawprint - Patagonian Cavies 101
		Caviomorpha This sub-order includes chinchillas, capybaras and similar animals
		Patagonian cavies belong to the sub-order Caviomorpha, which includes only rodents found in South and Central America.
		All members of this order have relatively long gestation periods, give birth to well-developed offspring, have small litters, and exhibit social behaviors that are far more complex than other rodents.
	www.pawprintonline.com /central-pcavy-101.html (820 words)

	RODENTIA (Site not responding. Last check: 2007-11-02)
		Then, we observe the reciprocal monophylies of Phiomorpha sensu stricto rodents–Bathyergidae, Thryonomyidae, and Petromuridae–and Caviomorpha.
		: Caviomorpha originated from Africa and directly crossed the Atlantic ocean to reach South America (Lavocat, 1969).
		The Echimyids or spiny rats represent the most diversified family among Caviomorpha, the South American hystricognath rodents lineage.
	www.isem.univ-montp2.fr /PPP/PM/RES/Phylo/Rod/@Rodents.php (1636 words)

	Los coipos (Rodentia, Caviomorpha, Myocastoridae) del “Mesopotamiense” (Mioceno tardío; ...
		Los coipos (Rodentia, Caviomorpha, Myocastoridae) del “Mesopotamiense” (Mioceno tardío; Formación Ituzaingó) de la provincia de Entre Ríos, Argentina - Miscelánea 12 - INSUGEO
		Abstract: The coipos (Rodentia, Caviomorpha, Myocastoridae) of the “Mesopotamiense” (Later Miocene, Ituzaingó Formation) of the Entre Ríos province, Argentina.
		A summary of the present state of knowledge of the coipos (Rodentia, Caviomorpha, Myocastoridae) coming from the “Mesopotamian” (= “Conglomerado osífero”, Late Miocene; Ituzaingó Fn.) at Entre Ríos Province, Argentina, is given.
	www.unt.edu.ar /fcsnat/INSUGEO/miscelanea_12/10.htm (2172 words)

	Millermeade Farm's Critter Connection -- Dormice
		Some website sources we found say it is a pattern of wear in the enamel on the surface of their teeth and other sources indicate the figure eight pattern can be seen in the enfolded edges of the molars (Najecki).
		• The closest relatives of the degus are the guinea pig and chinchilla, all of whom are in the suborder Caviomorpha in the Order Rodentia.
		There is some controversy as to whether degus are actually more closely related to rabbits, hares, and pikas (Order Lagomorpha) or to the chinchilla and guinea pig family (order Rodentia).
	www.critterconnection.cc /Animals/animals-degus.htm (2568 words)

	NHCCSmutty
		The classification of the rodents proposed by Professor Albert E. Wood the great authority on the group puts the caviidae in the super family ‘Cavioidea along with capybaras (the largest living rodents some of which have weighed a hundred weight) flase pacas, true pacas and agouties.
		The Cavioidea is found within the sub-order Caviomorpha.
		All the members of this group are south American except for one or two that have passed to North America since the bridge there via Mexico emerged from the sea in recent geological times.
	mysite.wanadoo-members.co.uk /nhcc/Articles/WhatEXACTLY.html (1342 words)

	Sedes Draconis: Announcements
		So I have to revise the Caviomorpha which were a major taxon of the Hajasith.
		I had two options, one was I could either fold Caviomorpha back into Rodentia, and expand the diversity significantly.
		But I also picked up some info on hyraxes recently, and the other option is to still leave rodents off the Hajasith, and replace them with an expanded Order Hyracoidea.
	www.sedesdraconis.com /index.cgi?Announcements (754 words)

	degu-eva
		The scientific (latin) name of the degu is Octodon degu and the degu does not belong to the order Rodentia (rodents) but to the South American Caviomorpha just as the guinea pig, the chinchilla, the capybara and so on.
		These species' was taxonomocally removed from the Rodentia and put in a separate, new order a few years ago, the Caviomorpha.
		For over 100 years and more the Swedish name has been degu.
	www.critterhut.com /care_sheets/degu-eva.htm (1292 words)

	ScienceWeek (Site not responding. Last check: 2007-11-02)
		Its adult body mass is about 50 kg, as much as that of a typical sheep.
		Phoberomys, the largest of all, is a member of the Caviomorpha, the group that includes the guinea pig.
		Until recently, it was known only from isolated teeth and bone fragments.
	scienceweek.com /2003/sa031031-4.htm (1580 words)

	DeguMania - Degu Myths
		Officially, Degus are still members of the suborder Caviomorpha in the Order Rodentia.
		The taxonomic status of Caviomorphs is, naturally, a subject of considerable debate among scientists.
		For one, it is known from the fossil record that Caviomorphs have been evolutionarily separated from the rest of the rodents for the past 17-25 million years.
	degumania.tripod.com /degu_myths_body.html (2522 words)

	Hystricognathi - Wikipedia, the free encyclopedia
		This, along with the relative size of the infraorbital foramen, distinguishes hystricognaths from the Sciuromorpha.
		There are 18 families within the Hystricognathi, divided into two infraorders, the Phiomorpha and the Caviomorpha.
		Skull of a Nutria demonstrating the hystricognathous lower jaw and hystricomorphous zygomasseteric system
	en.wikipedia.org /wiki/Hystricognathi (196 words)

	Cospeciation Symposium (Site not responding. Last check: 2007-11-02)
		The evolutionary relationships among the subgroups Phiomorpha and Caviomorpha within the Hytricognathi have generated considerable debate.
		Two hypothesis are conflicting: (i) Phiomorpha is the sister-group of Caviomorpha with both lineages originating from a common ancestor in Africa, or (ii) the Hystricognathi are polyphyletic with the Caviomorpha originating from a North-American ancestor.
		Some arguments in support of the monophyly of the Hystricognathi rely on the pinworm nematode genus Wellcomia Sambon, 1907.
	taxonomy.zoology.gla.ac.uk /~rdmp1c/sa/cospeciation.html (1540 words)

	InfoHub - Paleontology of Porcupines
		"Hystricidae rodents include Old World Phiomorpha and New World Caviomorpha.
		Our results indicate a basal trifurcation of hystriocognaths leading to Hystricidae, Phiomorpha s.s (Bastricidae, Thryonomyidae and Petromuridae), and Caviomorpha."
		It presents many ancestral characters, but their predecessors are unknown and the earliest fossils are recorded only since the early Miocene of Europe (Mackenna and Bell, 1997).
	www.infohub.com /forums/printthread.php?t=2368 (397 words)

	Degu origin
		ORDER- Rodentia INFRA ORDER- Hystricognatha SUB ORDER- Caviomorpha
		It's worth pointing out that degus can be referred to as (New World) rodents, hystricognaths, hystricomorphs, caviomorphs, octodontids and octodonts.
		The order Caviomorpha is divided into four lineages
	www.btinternet.com /~p.long/degutopia/degufam.htm (564 words)

	Hypography Science Forums - Rodentia Polyphyly?
		What is it, and how does it evolve?
		I would like to know if anyone is interested in the subject of Rodentia monophyly/polyphyly, particularly the subject of possible Caviomorpha divergence, just so that I can talk about it with some other people and see what they think.
		Basically I'm interested in this area so much because I'm the founder of a degu organisation (sub-order Caviomorpha).
	forums.hypography.com /biology/5100-rodentia-polyphyly.html#post79941 (1367 words)

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