Spongilla lacustris
Creators: name: Robert, Chloé
name: Pereira, Raquel
name: Thollesson, Mikael
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Porifera
Demospongiae
Spongillida
Spongillidae
Spongilla
Spongilla lacustris

description: Spongilla lacustris (Linnaeus, 1759)
Fig. 2
Spongia lacustris Linnaeus, 1759: 1348.
Material examined (109 specimens, Table 1)
SWEDEN – Dalsland • 3 specs; Lake Vänern, Mellerud, Sunannå harbour; 58.7092° N, 12.5072° E; 11 Oct.2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188195, 188197, 188199 • 4 specs; Åklång, Dalslands kanal, Håverud; 58.8214° N, 12.4061° E; 11 Oct. 2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188201, 188203, 188205, 188207. – Bohuslän • 1 spec.; Bohuslän, Lake S Bullaresjön, Naverstad, Sundshult; 58.7403° N, 11.5743° E; 8 Oct. 2017; Chloé Robert leg.; UPSZMC 188185 • 3 specs; Lake S Bullaresjön, Östad; 58.7719° N, 11.5693° E; 8 Oct. 2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188189, 188191, 188193. – Södermanland • 5 specs; Lake Likstammen, Öster Malma; 58.9468° N, 17.1708° E; 29 Jun. 2013; Mikael Thollesson leg.; UPSZMC 188012, 188015 to 188018 • 9 specs; Lake Naten, Stjärnhof bath; 59.0774° N, 17.0129° E; 30 Jun. 2013; Mikael Thollesson leg.; UPSZMC 188023, 188029 to 188036 • 5 specs; Lake Kyrksjön, bath; 59.0923° N, 16.9951° E; 30 Jun. 2013; Mikael Thollesson leg.; UPSZMC 188024 to 188028 • 5 specs; Klämmingen, Solbacken; 59.1307° N, 17.2454° E; 29 Jun. 2013; Mikael Thollesson leg.; UPSZMC 188014, 188019 to 188022.– Uppland • 1 spec.; Krägga herrgård; 59.603° N, 17.394° E; 2 Aug. 2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188114 • 2 specs; Viks bath; 59.7346° N, 17.4639° E; 2 Aug. 2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188110, 188112 • 3 specs; Hammarskogs bath; 59.7636° N, 17.5762° E; 2 Aug. 2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188122 to 188124 • 4 specs; Flottsund; 59.7875° N, 17.6626° E; 2Aug.2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188107, 188115, 188120, 188121 • 1 spec.; Lake Erken, Norr Malma, Erken freshwater laboratory; 59.8353° N, 18.6331° E; 30 May 2016; Raquel Pereira leg.; UPSZMC 188213 • 4 specs; Lake Siggeforasjön; 59.9759° N, 17.157° E; 26 May 2014; Tove Fällman leg.; UPSZMC 188100, 188102, 188104, 188106 • 2 specs; Gimo damm; 60.1786° N, 18.1718° E; 3 Aug. 2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188137, 188140 • 5 specs; Simbadet, Österbybruk; 60.195° N, 17.9143° E; 3 Aug. 2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188126, 188129, 188131, 188133, 188135.– Dalarna • 4 specs; Dalälven, Grådö; 60.2471° N, 16.027° E; 28 Aug. 2013; Mikael Thollesson leg.; UPSZMC 188037, 188056, 188059, 188061 • 1 spec.; Lake Viksjön, Strands boat club; 60.4841° N, 15.7447° E; 28 Aug. 2013; Mikael Thollesson leg.; UPSZMC 188064 • 4 specs; Lake Flosjön, harbour, Dala-Floda; 60.513° N, 14.8089° E; 28 Aug. 2013; Mikael Thollesson leg.; UPSZMC 188048, 188050, 188054, 188057 • 6 specs; Lake S Mojesjön, bath; 60.6003° N, 15.0885° E; 28 Aug. 2013; Mikael Thollesson leg.; UPSZMC 188039, 188041 to 188043, 188045, 188046 • 2 specs; Malungs camping, outlet into Västerdalälven; 60.6847° N, 13.7023° E; 29 Aug. 2013; Mikael Thollesson leg.; UPSZMC 188072, 188075 • 5 specs; Lake Orsasjön, Strandrestaurangen; 61.1186° N, 14.5985° E; 30 Aug. 2013; Mikael Thollesson leg.; UPSZMC 188082 to 188084, 188086, 188088 • 2 specs; Lake Skattungen, Oresjöns boat club; 61.1649° N, 15.1327° E; 30 Aug. 2013; Mikael Thollesson leg.; UPSZMC 188090, 188091 • 2 specs; Lake Hällsjön, northern rest stop; 62.0681° N, 12.6744° E; 28 Aug. 2003; Mikael Thollesson leg.; UPSZMC 188000, 188003. – Hälsingland • 3 specs; Lake Ängratörn, Vikstenstorpet; 61.9159° N, 15.3872° E; 31 Aug. 2013; Mikael Thollesson leg.; UPSZMC 188092, 188094, 188096. – Härjedalen • 12 specs; Hedeviken; 62.4083° N, 13.6697° E; 30 Aug. 2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188165, 188166, 188170 to 188177, 188179, 188181. – Medelpad • 2 specs; Lake Gissjön; 62.5233° N, 16.179° E; 29 Aug. 2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188147, 188148. – Jämtland • 2 specs; Lake Storsjön, Galhammar; 62.7784° N, 14.4321° E; 30 Aug. 2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188161, 188183 • 3 specs; Lake Sundsjön; 62.9513° N, 15.1623° E; 29 Aug. 2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188155, 188157, 188159 • 4 specs; Lake Storsjön, Slandrom; 63.1347° N, 14.6478° E; 29 Aug. 2017; Chloé Robert and Raquel Pereira leg.; UPSZMC 188209 to 188212.
Description
HABITUS. Specimens usually bright green (Fig. 2A), often with finger-like projections (Fig. 2B). Surface hispid due to protruding spicules.
SPICULAE. Skeleton with two classes of oxeas: smooth megascleres (Fig. 2C) and spined microscleres (Fig. 2D). Megascleres fusiform, microscleres acerate (Boury-Esnault & Rützler 1997). Gemmuloscleres were not observed. Megasclere length 265 μm (190–375 μm), width 11 μm (2.5–20 μm) (Fig. 2E). Microsclere length 76 μm (50–117.5 μm), width 4.8 μm (2.5–7.5 μm) (Fig. 2F).
Distribution and habitat
Widely distributed, entire sampling area; hard substrates in lakes and rivers.
Remarks
The finger-like projections distinguish this species from the other Swedish freshwater sponges, as does the presence of microscleres.
description: Published as part of 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, pp. 138-167 in European Journal of Taxonomy 828 (1) on pages 143-153, DOI: 10.5852/ejt.2022.828.1861, http://zenodo.org/record/6839811