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Systematics

Systematics and Classification

TermDefinition
homologous two organisms have the same feature due to a common ancestor
Sarcopterygii lobe fin fishes including lobe fin fishes and tetrapods
Actinopterygii ray fin fishes
Most diversification in spiny ray fishes occurs in... marine environment
Most diversification in soft ray fishes occurs in... freshwater environment
Gnathostomata Jawed fishes
Monophyletic group of organisms contains all descendants of common ancestor indicated by shared derived characters or synapomorphies
Character a trait or attribute in systematics
Character state form of the character feature
Taxonomy is.... classification of organisms
Systematics is... the phylogenetic relationships between organisms
Categories levels of classifications
taxa actual name of the organism
Phylogenetic Systematics parsimony analysis- produces max parsimony trees, developed by Hennig (1966) classification based on natural or monophyletic groups
synapomorphies shared derived characters that help describe differences between groups example; the presence of jaws
homoplasy resemblance in groups that is derived independently convergent evolution a pattern; not an evolutionary process
Created by: jcaughron
Popular Marine Sci Tech 1 sets

 

 



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