WFB 232 Ichthyology Order assignment – due Feb 20 Pick an order of fishes in either Class Cephalaspidomorphi or Class Chondrichthyes and summarize the following details on NO MORE than one page (see example). This may be easy with some orders (there may only be a few species in the entire order) or may be very challenging when there are dozens of families. In the latter case, you need to summarize the information by finding generalities among the diversity of species in the order. NOTE: if you use material from any of the resources verbatim, use quotes and cite the source; review the plagiarism rules on the syllabus. Name – what does the name mean? (Latin or Greek roots of the name) Taxonomic status – Superclass, Class, Order, number of families and genera, representative families (with common names if they exist), familiar or notable genera or species (common names ) in each family, local species (if any) Description – general description of body type, unusual characteristics; describe what particular characters link the species in this order and differentiate them from other orders Habitat – fresh or salt water, lakes or rivers, deep or shallow Distribution – summarize the global range of the order Ecology and life history – foraging mode, unusual species or habitat interactions Additional details – any unusual or interesting characteristics of this order; any interaction with humans (harvested, used in aquaria, dangerous, etc.) Recent research – find and cite a paper that has been written about one or more of the species in this order References used – cite the sources you consulted to obtain your information Suggested resources: Paxton, J. R. and W. N. Eshmeyer. 1998. Encyclopedia of fishes 2nd ed. Academic Press. Moyle, P. B. and J. J Cech. 2000. Fishes, an Introduction to Ichthyology. Prentice Hall Nelson, J. S. 1994. Fishes of the World. 3rd. ed. Wiley and Sons, New York. Scott, W. B. and E. J. Crossman. 1973. Freshwater fishes of Canada. Bull. Fish. Res. Bd. Can. 184:966pp. www.fishbase.com Note: as with all assignments, you will be graded on your grammar, punctuation, and spelling as well as information content. If you cite references (and you will need to cite for this assignment), use correct scientific citation format. Examples of book citations are shown above; an example of a paper citation is shown below. Beamish, R. J. and T. G. N. 1989. Extinction of a population of anadromous parasitic lamprey, Lampetra tridentata, upstream of an impassable dam. Can. J. Fish. Aquat. Sci. 46: 420-425. WFB 232 Ichthyology Myxiniformes (Greek myx-, ‘slime’) Taxomony: Superclass Agnatha – jawless fishes Class Myxini - hagfishes Order Myxiniformes Family Myxinidae 5 genera, ~ 40 species Description: most primitive vertebrates: degenerate eyes, cartilaginous skeleton, no vertebrae, no lateral line, jawless, anguilliform shape gill openings, no paired fins; vestigial caudal fin; 3 pairs of barbels around mouth isoosmotic (body fluids at same salinity as ocean) no larval stage (that has been found) structurally, but not functionally, hermaphroditic Habitat: Mostly soft bottom habitat Distribution: marine, temperate zone, intertidal to 5,000 m, mostly 25-1,500 m depths Ecology and life history: little known of life cycle; produce few, large eggs scavengers on dead fish; remove flesh with toothed tongue, may slide a knot along their body to apply pressure on carcass burrow in soft sediments; often found within fish carcasses Additional details: Economically important, used for leather and food in Asia Exude extremely large quantities of slime (“myxin”) First fossil evidence: Carboniferous, ~340 – 290 MYA References used: Bond, C. E. 1996. Biology of Fishes, 2nd. ed. Saunders College Publishing, Fort Worth Moyle, P. B. and J. J Cech. 2000. Fishes, an Introduction to Ichthyology. Prentice Hall Paxton, J. R. and W. N. Eschmeyer. 1998. Encyclopedia of fishes 2nd ed. Academic Press.