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Flashcards in Lesson 7 - Species Deck (20)
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Carl Linnaeus

Swedish naturalist, founding father of taxonomy, creator of binomial species name.

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Taxonomy

The science of naming and organizing organisms into related groups

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Binomial Name

Contains genus name (generic name) and specific epithet

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Genus name

Shared by all species of the same genus

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Specific epithet

May be shared by unrelated species (Tyrannosaurus rex, othnielia Rex, nuralagus Rex)

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Rule of priority

Once a species is officially given a binomial name, the name cannot be changed unless the organism turns out to not be a new species)

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Peer reviewed

Not published until it has been reviewed by other scientists to verify the contents are legitimate and scientifically reasonable

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Holotype

Physical example of the newly found species, kept in a research institution so other scientists may study it. Does not need to be a complete specimen.

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Interspecific variation

Individuals that differ in morphology because they belong to different species.

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Intraspecific variation

Individuals that belong to the same species but have different morphologies

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Sexual dimorphism

Males and females looking different from eachother

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Ontogenic variation

Ovarian ion visible between young and old individuals of the species (besides simple size differences)

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Individual variation

Normal variation that exists among individuals of the same species

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Taphonomic variation

Geologically caused variation due to plastic variation

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Biological species concept

Defines a species as a group of organisms that can successfully interbreed

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Population

Any grouping of organisms that live in the same geographic area and interbreed

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Morphological species concept

Defines a species as a group of organisms that share a certain degree of physical similarity

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Lumper

Palaeontologists who require more differences before they consider two species to be distinct

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Splitter

Palaeontologists who require fewer differences before they consider two species to be distinct

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Hesperonychus elizabethae

Very small dromaeosaurid dinosaur discovered in Alberta. Holotype resides at the u of a