Ephydatia fluviatilis
- 1. Dept. Organismal Biology, Uppsala University, Norbyvägen 18 D, SE- 752 36 Uppsala, Sweden. & Dept. Marine Sciences, University of Gothenburg, Box 461, SE- 405 30 Göteborg, Sweden.
- 2. Dept. Organismal Biology, Uppsala University, Norbyvägen 18 D, SE- 752 36 Uppsala, Sweden.
Description
Ephydatia fluviatilis (Linnaeus, 1759)
Fig. 3
Spongia fluviatilis Linnaeus, 1759: 1348.
Material examined (4 specimens, Table 1)
SWEDEN – Stockholm • 3 specs; Helgarsviken; 59.289° N, 18.7032° E; 2 Sep. 2017; Raquel Pereira leg.; UPSZMC 188229, 188231, 188233 • 1 spec.; Stavsnäs vinterhamn; 59.2889° N, 18.7062° E; 31 Dec. 2021; Raquel Pereira and Jesper Svedberg leg.; UPSZMC 189246
DescriptionHABITUS. Colour from pale to brownish, encrusting (Fig. 3A).
SPICULAE. Megascleres and gemmuloscleres. Megascleres thin, smooth and acute oxeas (Fig. 3B), 250 μm (60–360 μm) long (Fig. 3C), 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 habitatsThis species was only found in the Baltic, but was missing from the bona fide freshwater samples.
RemarksFive 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.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Collection code
- UPSZMC
- Event date
- 2017-09-02 , 2021-12-31
- Family
- Spongillidae
- Genus
- Ephydatia
- Kingdom
- Animalia
- Material sample ID
- UPSZMC 188229, 188231, 188233 , UPSZMC 189246
- Order
- Spongillida
- Phylum
- Porifera
- Scientific name authorship
- Linnaeus
- Species
- fluviatilis
- Taxon rank
- species
- Verbatim event date
- 2017-09-02 , 2021-12-31
- Taxonomic concept label
- Ephydatia fluviatilis (Linnaeus, 1759) sec. Robert, Pereira & Thollesson, 2022
References
- Linnaeus C. 1759. Systema Naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Editio decima, reformata. Vol. 2. Laurentii Salvii, Stockholm [Holmiae]. https: // doi. org / 10.5962 / bhl. title. 542
- Arndt W. 1932. Die Susswasserschwammfauna Schwedens, Finnlands und Danemarks. Arkiv for Zoologi 24 A (3): 1 - 33.