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Topic: Actinopteri

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	Actinopteri (Site not responding. Last check: 2007-10-31)
		Eukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Actinopterygii > Actinopteri
		Dating back to the Permian period, the Actinopteri are comprised of the Chondrostei (sturgeons and paddlefishes) and the Neopterygi (bowfin, gars, and teleosts).
		Modern actinopterygians generally feed using a suction mechanism, with the mouth parts forming a tube.
	bopedia.com /en/wikipedia/a/ac/actinopteri.html (95 words)

	Two Carboniferous fine-eyed palaeoniscoids (Pisces, Actinopterygii) from Bear Gulch (USA) Journal of Paleontology - ...
		Comparisons with other Palaeozoic actinopterygians show that Kalops is a Palaeoniscimorpha (=basal Actinopteri sensu Patterson).
		As in previous articles (e.g., Poplin and Lund, 2000), we use the term "Palaeon-- iscimorpha" (Lund et al., 1995) as a strict synonym of "Basal Actinopteri" sensu Patterson, 1982.
		Discussion.-Since, at this time, there is no consensus among paleoichthyologists about a classification of Palaeoniscimorpha, we give for Kalops a diagnosis that utilizes not only its generic characters, but also those of Actinopterygii, Actinopteri and Palaeoniscimorpha (see discussion).
	www.findarticles.com /p/articles/mi_qa3790/is_200211/ai_n9154198 (877 words)

	124 (Site not responding. Last check: 2007-10-31)
		A distinctive development in poeciliids is the submitochondrial net.
		Poeciliids have greatly reduced the axonemal fins which are a synapomorphy of the Actinopteri.
		Exocoetoids have retained well developed fins in Arrhamphus, Dermogenys and Nomorhamphus but reduction has occurred in Zenarchopterus, in which the fins are small, and, apparently independently, in Hemirhamphodon in which fins are absent.
	users.bigpond.net.au /Barrie_Jamieson/124ABSTRACT.htm (310 words)

	Untitled Document
		The major groups (usually defined as subclasses) of fish that evolved and reached peak diversity during these times were the: Chondrostei (sturgeons and paddlefishes), Holostei (bowfin and gars), and Teleostei, respectively.
		Subsequently, the Holostei has been abandoned as a monophyletic group and two groups have been recognized: the Cladistia (bichirs and reedfish and the Actinopteri (all remaining groups).
		The uncertain systematic relationships of the cladistians is caused by the possession of some traits that are shared with diverse lineages (e.g., lobe-like external appearence of pectoral fin with sarcops, spiricles with sharks and sturgeons, two gular plates as in the coelacanths, external gills as young just like some lungfish).
	www.zoology.ubc.ca /~etaylor/426www/lectures/actinops.html (2098 words)

	Williston 1899
		The former regards them as Teleostei; the latter as "Ganoids." As I do not adopt the division signified by the last name, I find Professor Pictet's view nearer to the point.
		The specimens indicate further that the Dercetidæ belong to the Actinopteri, and probably to the order Hemibranchii.
		The only alternative is the order Isospondyli, and the characters which separate the two are not clearly shown in the specimens, Distinct bones below the pectoral fins may be interclavicles, which belong to the Hemibranchii."
	www.oceansofkansas.com /Williston99.html (983 words)

	The materials provided with the previous exam
		A5) (5 points) Which group of fish is defined by a fringing furcula, and what is the function of this apomorphy.
		Actinopteri: strengthens the leading edge of the median fin, preventing collapse and hence facilitating high swimming speeds.
		A6) (5 points) Given the features of mtDNA and nDNA, explain why many studies on phylogenetic systematics focus on mtDNA?
	www-personal.umich.edu /~pwebb/NRE422-BIO440/lec21.html (2215 words)

	V's Bio I
		Link # 5: Everything you ever wanted to know about bony fish!
		Link #6: The actinopteri are the bony fish with normal fins instead of lobes.
		Link # 7: A living fossil-a true dino fish!
	myschoolonline.com /page/0,1871,48456-139988-51-111250,00.html (92 words)

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