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

Skeletal remains of freshwater sponges are important microfossils that may be preserved in the sediments of inland waters, but much is still unknown about the sponge fauna of the Nearctic, which limits their use in paleoenvironmental reconstructions. Here, we report the first evidence of an extant freshwater sponge fauna in Jackson Lake, Grand Teton National Park, Wyoming (USA). Two sponge species were identified living in shallow littoral and shoreline environments:  Eunapius fragilis  (Leidy  1851 ) and  Ephydatia muelleri  (Lieberkühn  1856 ). The spicules of   Eunapius fragilis  present high morphological variability, in contrast to gemmuloscleres reported in specimens from lakes and rivers in southern South America and eastern North America.  Ephydatia muelleri  also exhibits morphological differences in comparison to published examples, chiefly related to the spines on megascleres. The megascleres of  Ephydatia muelleri  are straight or slightly curved, sharpening gradually toward the apices, with completely smooth surfaces (13%), surfaces with minimal spines (65%), or highly spined surfaces in the central area (22%). These morphological differences in the  Ephydatia muelleri  megascleres suggest the potential for ecophenotypic effects in Jackson Lake. Furthermore, the morphological and ecological variability of  Eunapius fragilis  and  Ephydatia muelleri  observed in Jackson Lake suggest the need for further studies of the Nearctic to understand if a species complex exists or if morphological dissimilarities are indicative of true taxonomic differences and therefore multiple new species. This study expands the biogeography of freshwater sponges and provides the first documentation of benthic sessile filter feeders in Jackson Lake, a key source of ecosystem services.

First evidence of an extant freshwater sponge fauna in Jackson Lake, Grand Teton National Park, Wyoming (USA)