English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The genus Allocrangonyx was first described by Schellenberg (1936), who established this genus to include a single subterranean species (A. pellucidus) that had previously been described by Mackin (1935) but relegated to the genus Niphargus. Although Mackin (1935) placed his new species in Niphargus, he did so only after slightly modifying the original concept of this genus. Schellenberg (1936) did not agree with Mackin, however, and was able to clearly show why AllocrGngonyx should be considl~red a distinct genus. Nevertheless, in a subsequent paper, Hubricht and Mackin (1940) gave a new locality record for A. pellucidus and continued to leave this species in Niphargu~'. Hubricht (1943), however, in giving further locality records for A. pellucidus, followed Schellenberg and recognized the genus AllocrGngonyx. During a current revision of the North American gl~nera of the CrGngonyx group of the family Gammaridae, I have had the opportunity to examine material pertinent to AllocrGngonyx, and as a result of this study an undescribed species from two caves in central Missouri has been revealed and is described herein. Because of the singular importance of A. pellucidus as the type species of the genus and because of the new data obtained from additional collections and critical re-evaluation of olcler material, I have also found it necessary to give a partial redescription of this species. Moreover, in light of the newly obtained data, and in order to facilitate a critical comparison of AllocrGngonyx with other potentially related North American and European amphipod genera, a diagnostic redescription of Allocrangonyx has been prepared.

A new species of the subterranean amphipod genus Allocrangonyx (Gammaridae), with a redescription of the genus and remarks on its zoogeography