Biemna aurantiaca 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 : 20-23

publication ID 10.5852/ejt.2020.715

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scientific name

Biemna aurantiaca Bertolino

sp. nov.

Biemna aurantiaca Bertolino , Costa & Pansini sp. nov.

Figs 7–8 View Fig View Fig ; Table 6


The new species is named after its orange colour.

Type material


CHILE – Puerto Cisnes • Seno Magdalena G ; 44.763254° S, 72.891581° W; depth 15 m; 5–10 Aug. 2016; Marco Bertolino leg.; on a rocky slope by scuba diving; CILE 20 ; MSGN 61497 .



CHILE – Puerto Cisnes • 1 specimen; same collection data as for holotype; CILE 6; DISTAV. GoogleMaps


HABITUS. Cushion-shaped sponge, almost spherical, 3.5 cm in diameter and ca 2 cm thick. Canal system visible, converging towards round flush oscula. Surface slightly hispid, colour in life bright orange ( Fig. 7 View Fig A–B). Consistency soft and friable.

SKELETON. Plumoreticulate choanosome ( Fig. 7C View Fig ) with spongin fibres cored by bundles of spicules typical of Biemnidae . Sponge surface appears slightly hispid due to single protruding spicules ( Fig. 7C View Fig ).

SPICULES. Megascleres: Smooth sinuous styles, with regular, round heads ( Fig. 8A View Fig ), 700–(842.5)– 920 μm long and 2.5–(4.8)–7.5 μm thick. Tylostyles sometimes slightly bent near head ( Fig. 8B View Fig ), 120–(269.25)–380 μm long and 5–(12.9)–20 μm thick. Microscleres: two categories of raphids; I, long and thin raphids, curved or slightly sinuous, 105–(129.5)–200 μm long, with microspined extremities ( Fig. 8C View Fig ); II, short and thick raphidioid microxeas with small scattered spines ( Fig. 8D View Fig ), 27.5–(35.6)– 40 × 2 μm long. C-shaped sigmas with microspined extremities, divided into two size categories: sigmas I, 130–(160.8)–170 μm long and × 5–(5.7)–7.5 μm thick ( Fig. 8E View Fig ); sigmas II, 12.5–(13.12)–17.5 μm long ( Fig. 8F View Fig ).


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


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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