Antarctotetilla grandis

• 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 grandis; Antarctic; Kerguelen; Antarc*
• Online Access: https://zenodo.org/record/5988729; https://doi.org/10.5281/zenodo.5988729

Antarctotetilla grandis (Sollas, 1886) Synonymy: Tetilla leptoderma Sollas, 1886; Tetilla grandis var. alba Sollas, 1886; Craniella coactifera (Lendenfeld, 1907). Material examined: holotype of Tetilla grandis NHM98.1.1.5 Sollas, 1886, Kerguelen, Subantarctic region; Antarctotetilla grandis, CEAB.POR.BIO.501b ANT 27123 and CEAB.POR.BIO.501aANT 27124, Newmayer, Antarctic coasts, -70° 52.21‘S, 10° 35.81‘W, 225–284 m depth, 0 1 April 2011; Tetilla grandis, MNHN-IP 2011 167, Terre D’Adelie, Antarctic coasts, -66°34'S, 141°204'E, 170–210 m depth, 13 January 2008. GenBank accession numbers (Carella et al. 2016): CEAB.POR.BIO.501b ANT 27123 (KT124324, KT124344, KT124330 and KT124363) and CEAB.POR.BIO.501a ANT 27124 (KT124325, KT124346, KT124331 and KT124364). Description (Fig. 6). Globular, almost spherical sponges, about 10 cm in diameter (Fig. 6a). Surface smooth; oscules numerous on small conical elevations of the sponge surface (Fig. 6b). Pores grouped in small depressions, widespread overall the surface (Fig. 6c). Color beige in life, yellowish brown in alcohol. Pseudocortex (Fig. 6d) composed of auxiliary oxeas loosely arranged perpendicularly to the surface, as in Antarctotetilla leptoderma. Anchoring anatriaene-made tufts. Spicules (Fig. 7; Table 1). Megascleres: oxeas I (Fig. 7a) large and fusiform: 3500–5513.8–7850 µm x 35 – 54.6–78 µm. Auxiliary small oxeas II (Fig. 7b): 600–1211.8–1900 µm x 6.2–20–35 µm. Anatriaenes I (Fig. 7f): 3340–9195–14550 µm x 17.5–26.3–30 µm in size with long and thin clades: 140–220.3–320 µm; rhabdomes fusiform, thicker at the middle and filiform at the terminal part. Anatriaenes II: 1650–3483.3–6000 µm x 8.7–15.6– 20 µm in size (Fig. 7e) with short clades: 50–75–120 µm and fusiform rhabdomes. Protriaenes I (Fig. 7c): 4180– 5217.7–8000 µm x 10 –28.4–42.5 µm, with clades of 60–152–280 µm long, usually one clade longer than the others two; rhabdomes tapering from the base of the clades to end in a filamentous termination. Protriaenes II (Fig. 7d): 1700–3152.7–5400 µm x 6.2–12–18.5 µm, ...