Based on data associated with variable means, in addition to data ranges, the following dichotomous key
for species delineation was developed using interquartile values.
In our second-semester curriculum we cover classification and how to use a dichotomous key
The dichotomous key
employs a series of pairs of contrasting statements (couplets) related to morphological features of the organism being identified.
This article presents a simple technique for easy viewing of lake plankton communities, a simple dichotomous key
that will ease students into the identification process, and a suggestion for an exercise to demonstrate changes in community structure as a result of seasonal succession.
A dichotomous key
to the known Zadadra species is also given.
The authors suggest places to visit to further study each type of natural community and provide a comprehensive glossary of ecological terms, as well as a dichotomous key
for aiding field identification.
Future work will further test these conclusions and our goal is to produce a more useful dichotomous key
to California pipefishes.
This section presents a dichotomous key
to Keys A through N with page numbers.
It does not closely resemble the other species of the genus Egglestonichthys; indeed, all four described species are rather different from each other in body form and colour pattern (see Remarks and dichotomous key
The Illustrated Taxonomy Manual of Weed Seeds (Delorit, 1970) covers 192 species with a dichotomous key
to aid in searching, and Weed Seeds of the Great Plains: A Handbook for Identification (Davis, 1993) covers 280 species with a polychotomous key.
Have students create a dichotomous key
to identify their backpacks.
Using photographs of bones in museum collections, along with clarifying text and drawings, Bochenski and Tomek provide a dichotomous key
using all major skeletal elements of higher systematic units--orders, families, and genera--containing domesticated species of birds.