Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Functional Anatomy of the Walking-Legs of Scorpionida With Remarks On Terminology and Homologization of Leg Segments

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Netherlands Journal of Zoology
For more content, see Archives Néerlandaises de Zoologie (Vol 1-17) and Animal Biology (Vol 53 and onwards).

In the present paper a study is made of the tendons and joints of the walking-legs in Euscorpius flavicaudis (De Geer) (Chactidae), whilst several other species of scorpions are mentioned also. Five new terms (a-, eu-, mono-, bi- and tridesmatic) are introduced in order to enable a precise and purely morphological description of joints and segments. The investigation summarized here has been carried out in order to determine the types of joints, to trace adesmatic joints and to denominate eudesmatic and adesmatic leg segments. Some structures described by MANTON (1958) have been further investigated and more exactly defined. The complete series of walking-legs is illustrated here in detail, just as the structure of the joints. In order to explain the positions of the leg segments and the directions of movement, the orientations of the planes of pseudosymmetry of the individual leg segments have been established; they are illustrated here by diagrams. These diagrams are used here particularly to explain the tarsal torsion, i.e. the turning of the terminal segments as a compensation for the turning at the base of the leg. It is pointed out here that the shape of some segments, articulation points and joints are adaptations to life in burrows, just as the orientation of some muscles and the torsions in leg segments (resulting in an oblique position of the plane of pseudosymmetry of the leg). The difference in function between leg I and leg IV is demonstrated by the position of the leg. Leg I is often functioning as a tactile organ and its terminal part is directed rostrally. The main function of leg IV is putting forth the propulsive force in locomotion; its terminal part is directed caudo-ventrally. In this way the useful effect of these legs (considering the functions mentioned here) is enlarged. In many respects the leg structures of the Scorpionida (which still are often considered rather primitive animals) appear to be highly specialized. A hypothesis is introduced concerning the origin of the flattened protuberances (gnathobases auct.) on coxae I and II, and concerning their relation to the sternapophyses of some other Arachnidea. The new term coxapophysis is introduced here for these protuberances. The erroneous usage of terms (among which the application of undefined or misleading terms) has led to a certain confusion in the morphological terminology of the Arachnidean legs. As a contribution to a correct and uniform terminology, much attention is paid here to an exact definition of terms, whilst a nearly complete list of synonyms from literature on walking-legs of Scorpionida has been compiled. An extensive list of the literature is also made.

Affiliations: 1: (Rijksmuseum van Natuijke Historie, Leiden, The Netherlands


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    Netherlands Journal of Zoology — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation