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

Species Status in Question: A Morphometric and Molecular Comparison of Cyrtograpsus Affinis and C. Altimanus (Decapoda, Brachyura, Varunidae)

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.

This Article is currently unavailable for purchase.
Add to Favorites
You must be logged in to use this functionality

Cover image Placeholder

Abstract Three species of the varunid crab genus Cyrtograpsus (Brachyura: Grapsoidea) occur in apparent sympatry along temperate coastlines of the southwestern Atlantic. Two of them, C. angulatus Dana, 1851, and C. altimanus Rathbun, 1914, are common in intertidal habitats and are easily separable by their morphology. In contrast, there is very limited knowledge on the ecology and distribution of the third species, C. affinis (Dana, 1851). In the present study, several specimens of C. affinis were collected in the Río de la Plata Estuary between Argentina and Uruguay. The study of these specimens showed that C. affinis tends to be smaller than the other two species of the genus and seems to be restricted to subtidal habitats. However, morphometric comparisons suggest the existence of a continuous gradient rather than discrete differences between specimens of C. affinis and C. altimanus. Morphometric differences were as common among subtidal samples as between subtidal and intertidal samples. Likewise, comparison of mitochondrial DNA sequences (16S rRNA) did not reveal diagnostic differences between the two putative species, suggesting a very close relationship between C. altimanus and C. affinis. Possibly the two forms represent a single species with a high ecological and phenotypic plasticity.

Affiliations: 1: a (EDS, correspondence) Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Casilla de Correos 1216, 7600 Mar del Plata, Argentina. ( ; 2: b (CDS) Biologie I (Zoologie), Universität Regensburg; 93040 Regensburg; Germany. (


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation