Ephydatia fluviatilis ( Linnaeus, 1759 )

Robert, Chloé, Pereira, Raquel & Thollesson, Mikael, 2022, Addition to Sweden’s freshwater sponge fauna and a phylogeographic study of Spongilla lacustris (Spongillida, Porifera) in southern Sweden, European Journal of Taxonomy 828 (1), pp. 138-167 : 154

publication ID

https://doi.org/ 10.5852/ejt.2022.828.1861

publication LSID

lsid:zoobank.org:pub:92E8908C-818C-49CD-8E84-A95479F8E455

DOI

https://doi.org/10.5281/zenodo.6841095

persistent identifier

https://treatment.plazi.org/id/90618787-FFC6-FFF8-FDA4-FE991AFD9023

treatment provided by

Felipe

scientific name

Ephydatia fluviatilis ( Linnaeus, 1759 )
status

 

Ephydatia fluviatilis ( Linnaeus, 1759) View in CoL

Fig. 3 View Fig

Spongia fluviatilis Linnaeus, 1759: 1348 .

Material examined (4 specimens, Table 1 View Table 1 )

SWEDEN – Stockholm • 3 specs; Helgarsviken ; 59.289° N, 18.7032° E; 2 Sep. 2017; Raquel Pereira leg.; UPSZMC 188229 , 188231 , 188233 GoogleMaps 1 spec.; Stavsnäs vinterhamn ; 59.2889° N, 18.7062° E; 31 Dec. 2021; Raquel Pereira and Jesper Svedberg leg.; UPSZMC 189246 GoogleMaps

Description

HABITUS. Colour from pale to brownish, encrusting ( Fig. 3A View Fig ).

SPICULAE. Megascleres and gemmuloscleres. Megascleres thin, smooth and acute oxeas ( Fig. 3B View Fig ), 250 μm (60–360 μm) long ( Fig. 3C View Fig ), 7.5 μm (2–15 μm) wide. Very few gemmuloscleres found in the collected specimens; birotulated, often a spine on the shaft, 20 µm long and 25 μm wide.

Distribution and habitats

This species was only found in the Baltic, but was missing from the bona fide freshwater samples.

Remarks

Five specimens from inland waters tentatively identified as E. fluviatilis (based on megasclers only, lacking gemmulae) was reassigned to Eunapius fragilis based on bar-coding sequences and a re-scrutiny of spiculae, so there is a possibility that some previously reported specimens of this (in Sweden) rare species may be misidentifications. It is quite possible, however, that it is present at greater depth at some of the sites, and thus missed in our study – the specimens from the Baltic were all from greater depths. We note, though, that Arndt (1932) only listed specimens from seven sites, all but one site outside (south of) the present study area, so the lack of observations may reflect a rare occurrence.

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Spongillida

Family

Spongillidae

Genus

Ephydatia

Loc

Ephydatia fluviatilis ( Linnaeus, 1759 )

Robert, Chloé, Pereira, Raquel & Thollesson, Mikael 2022
2022
Loc

Spongia fluviatilis

Linnaeus C. 1759: 1348
1759
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