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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In this contribution, the larval morphology of    Spencerhydrus    Sharp, 1882 was studied, an Australian endemic genus in the diving beetle tribe   Cybistrini  . All instars of the only two species included in the genus (   S.   latecinctus    Sharp, 1882 and    S.   pulchellus    Sharp, 1882) are described and illustrated with the exception of the third instar of    S.   latecinctus   . Detailed morphometric and primary chaetotaxic analyses were performed to discover useful characters for generic diagnosis and species distinction.    Spencerhydrus    can be distinguished from other   Cybistrini   genera by the medial projection of frontoclypeus slightly indented apically, with lamellae clypeales directed forward in a characteristic V-shaped pattern, the median process of prementum strongly developed, the presence of a single ventral sclerite on prothorax, the presence of basoventral spinulae on claws, and the reduced sclerotization of the abdominal segment VII which covers only the anterior half. Larvae of the two species of    Spencerhydrus    can readily be distinguished by the shape of the median process of prementum, which is visibly broader in    S.   pulchellus    than in    S.   latecinctus   .

zookeys

Dealing with a hairy beast–larval morphology and chaetotaxy of the Australian endemic diving beetle genus    Spencerhydrus    (  Coleoptera  ,   Dytiscidae  ,   Cybistrini  )