Biemna erecta Bertolino, 2020

Bertolino, Marco, Costa, Gabriele, Bavestrello, Giorgio, Pansini, Maurizio & Daneri, Giovanni, 2020, New sponge species from Seno Magdalena, Puyuhuapi Fjord and Jacaf Canal (Chile), European Journal of Taxonomy 715, pp. 1-49 : 23

publication ID 10.5852/ejt.2020.715

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scientific name

Biemna erecta Bertolino

sp. nov.

Biemna erecta Bertolino , Costa & Pansini sp. nov.

Figs 9–10 View Fig View Fig ; Table 6


The new species is named after its growth form.

Type material


CHILE – Puerto Cisnes • Seno Magdalena D ; 44.614863° S, 72.958312° W; depth 20 m; 5–10 Aug. 2016; Marco Bertolino leg.; on a vertical wall by scuba diving; CILE 74 ; MSGN 61496 .



HABITUS. Fan-shaped lamellar sponge, about 3 mm thick and 3.5 cm long, with basal peduncle. Surface very hispid caused by megascleres protruding from surface. Colour in life pale yellow, tending to orange ( Fig. 9 View Fig A–B). Consistency soft, compressible and friable in dry state.

SKELETON. Plumose skeleton formed by dense fibres of spicules whose extremities protrude through surface of sponge, resulting in hispid appearance ( Fig. 9C View Fig ). Choanosome differentiated into two regions composed of axial compressed and extra-axial plumose fibres ( Fig. 9 View Fig D–E). Basal peduncle formed by ascending central fibres with radial spicules ( Fig. 9F View Fig ).

SPICULES. Megascleres: Styles smooth and sinuous, with regular round heads ( Fig. 10A View Fig ), 1810.5– (2033.3)–2295 μm long and 15–(17.5)–20 μm thick; tylostyles/subtylostyles slightly curved near the head ( Fig. 10B View Fig ), 350–(607.5)–960 μm long and 10–(18.75)–30 μm thick. Microscleres: Two categories of raphids; I, sinuous and thin raphids ( Fig. 10C View Fig ), 87.5–(115)–167.5 μm long; II, short and thick raphids, with small scattered spines, similar to raphidioid microxeas, 23.4–(36.55)–42.5 μm long and 2 μm thick ( Fig. 10D View Fig ). C-shaped sigmas with microspined extremities clearly divided into two size categories: sigmas I, ( Fig. 10E View Fig ), 140–(159.5)–180 μm long and 5–(5.7)–7.5 μm thick; and sigmas II, ( Fig. 10F View Fig ), only 10–(14.5)–17.5 μm long.


Species lives on a vertical wall at a depth of 20 m.


We have recorded three new species of the genus Biemna and have therefore decided to make combined remarks after their description.

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