Antarctotetilla pilosa Carella & Uriz 2018, nov. sp.

• Main Authors: Carella, Mirco, Uriz, Maria J.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2018
• Subjects: Biodiversity; Taxonomy; Animalia; Porifera; Demospongiae; Tetractinellida; Tetillidae; Antarctotetilla; Antarctotetilla pilosa; Antarc*
• Online Access: https://zenodo.org/record/5988737; https://doi.org/10.5281/zenodo.5988737

Antarctotetilla pilosa nov. sp. Material examined: 1 individual (holotype, CEAB. POR. BIO.502a ANT 27211), South Orkneys, Subantarctic region, - 61° 8.74‘S, -43° 58.15‘W, 407 m depth, 19 February 2011 (Carella et al. 2016). GenBank accession numbers (Carella et al. 2016): CEAB.POR.BIO.502a ANT 27211(KT124313 see S1, KT124355 and KT124361). Description (Fig. 12). Globular, 8 cm in diameter sponge (Fig. 12a, b and c).Long hairy hispidation protruding up to 2 cm, throughout the surface, caused by long fusiform oxeas, protriaenes, and sometimes anatriaenes. This hispidation becomes much longer (up to 4 cm) after sponge desiccation due to flesh retraction. Oscules of several sizes spread on the sponge body (Fig. 12d). Pores grouped in more or less deep surface depressions (Fig. 12e). Pseudocortex (Fig. 12f) composed of loose auxiliary oxeas perpendicular to the sponge surface. Megascleres: oxeas, protriaenes, anatriaenes, and trichodal protriaenes; microscleres: sigmaspires. A basal root-tuft system of anatriaenes. Spicules (Fig. 13; Table 1). Megascleres: oxeas I (Fig. 13a) large and fusiform: 4050–7682.5–10950 µm x 35 – 83.5–120 µm. Auxiliary small oxeas II (Fig. 13b): 630– 1137–1780 µm x 12.5–22.4–35 µm. Anatriaenes I (Fig. 13f): 7180–12460–16880 µm x 22.5–24.5–27.5 µm in size with long and thin clades: 160–190.5–210 µm long; rhabdomes fusiform, thicker at the middle and filiform at the terminal part. Anatriaenes II: 3220–3806.7–4960 µm x 15 –17.5–22.5 µm in size (Fig. 13e) with short clades: 62.5–85.8–130 µm and fusiform rhabdomes. Anatriaenes III (Fig. 13g): 4400–10265–14350 x 17.5–24.4–27.5 µm in size with thick, 70–117.6 –140 µm long clades; rhabdomes fusiform, thicker at middle and filiform at the terminal part. Protriaenes I (Fig. 13d): 4300–6986.2– 10880 µm x 20–30–40 µm with clades: 100–181.7–260 µm long, usually one clade longer than the other two; rhabdomes tapering from the base of the clades to end in a filamentous termination. Protriaenes II (Fig. 13c): 2400– 2767.5–3250 µm x 10 –11.9–17.5 µm, with ...