Under Construction

Habronattus americanus group

Wayne Maddison
Click on an image to view larger version & data in a new window
Click on an image to view larger version & data in a new window
taxon links [up-->]Habronattus waughi [up-->]Habronattus kawini [up-->]Habronattus tarsalis [up-->]Habronattus ophrys [up-->]Habronattus mustaciata [up-->]Habronattus tuberculatus [up-->]Habronattus sansoni [up-->]Habronattus bulbipes [up-->]Habronattus americanus [down<--]Habronattus Interpreting the tree
close box

This tree diagram shows the relationships between several groups of organisms.

The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents the ancestor of the other groups in the tree. This ancestor diversified over time into several descendent subgroups, which are represented as internal nodes and terminal taxa to the right.

example of a tree diagram

You can click on the root to travel down the Tree of Life all the way to the root of all Life, and you can click on the names of descendent subgroups to travel up the Tree of Life all the way to individual species.

For more information on ToL tree formatting, please see Interpreting the Tree or Classification. To learn more about phylogenetic trees, please visit our Phylogenetic Biology pages.

close box
Tree from Griswold (1987).
Containing group: Habronattus


The americanus group includes some of the most colorful species of salticids. This primarily western group is recognized by the form of its palpus, the black first tarsus, and its remarkable ornaments on the face and palpi. In several of the named species (americanus, sansoni, tarsalis), there is strong geographic differentiation, to the extent that many more species may eventually be recognized in this group.


Click on an image to view larger version & data in a new window
Click on an image to view larger version & data in a new window

The americanus group has a distinctive palpus, both in having the bulb only slightly rotated counterclockwise from the condition in the related genus Pellenes, and in having a distinctively shaped tegular apophysis. In addition, the first legs are somewhat long and the tarsal area has a black scopula (see figure).

The ornaments consist of a typically fringed first leg, striped or colored cymbium, and high clypeus that may be striped, metallic blue or green, or otherwise colored. Long setae on the clypeus extend forward from the face, and setae around the front eyes often make an eyebrow or other tuft. Except for H. americanus and H. waughi, the latter of which reaches the Atlantic coast of Canada, all species are western.


Griswold, C. E. 1987. A revision of the jumping spider genus Habronattus F.O.P.-Cambridge (Araneae; Salticidae), with phenetic and cladistic analyses. University of California Publications, Entomology 107: 1-344.

Title Illustrations
Click on an image to view larger version & data in a new window
Click on an image to view larger version & data in a new window
Scientific Name Habronattus americanus
Location Mt. Pinos, California, USA
Specimen Condition Live Specimen
Sex Male
Copyright © 1994-1995 Wayne Maddison
Scientific Name Habronattus tarsalis
Location Bishop, California, USA
Comments may actually be nearer kawini
Specimen Condition Live Specimen
Sex Male
Copyright © Wayne Maddison
About This Page

Wayne Maddison
University of British Columbia, Vancouver, British Columbia, Canada

Correspondence regarding this page should be directed to Wayne Maddison at

All Rights Reserved.

Citing this page:

Maddison, Wayne. 1995. Habronattus americanus group. Version 01 January 1995 (under construction). http://tolweb.org/Habronattus_americanus_group/3998/1995.01.01 in The Tree of Life Web Project, http://tolweb.org/

edit this page
close box

This page is a Tree of Life Branch Page.

Each ToL branch page provides a synopsis of the characteristics of a group of organisms representing a branch of the Tree of Life. The major distinction between a branch and a leaf of the Tree of Life is that each branch can be further subdivided into descendent branches, that is, subgroups representing distinct genetic lineages.

For a more detailed explanation of the different ToL page types, have a look at the Structure of the Tree of Life page.

close box

Habronattus americanus group

Page Content

articles & notes



Explore Other Groups

random page

  go to the Tree of Life home page