Antarctotetilla coactifera

• 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 coactifera; Kerguelen; Antarc*
• Online Access: https://zenodo.org/record/5988733; https://doi.org/10.5281/zenodo.5988733

Antarctotetilla coactifera (Lendenfeld, 1907) Synonymy: Tethya coactifera Lendenfeld, 1907; Cinachyra coactifera (Lendenfeld, 1907); Craniella coactifera (Lendenfeld, 1907); Tetilla coactifera (Lendenfeld, 1907). Material examined: Syntype of Tethya coactifera, ZMB Por 4175 Lendenfeld, 1907 from Kerguelen (Subantarctic). GenBank accession number: Syntype of Tethya coactifera, ZMB Por 4175 (MF168949, S1). Description (Fig. 10). Globular, 5 cm in diameter, sponge (Fig. 10a). Surface smooth, slightly rugose. Oscules small and very scarce (Fig. 10b). Pores grouped in slight depressions (Fig. 10c), widespread on the sponge surface. Color yellowish brown in alcohol. Pseudocortex (Fig. 10d) made of auxiliary oxeas, loosely arranged, perpendicularly to the sponge surface. Not conspicuous basal spicule tufts in the syntype examined. Spicules (Fig. 11; Table 1). Megascleres: oxeas I (Fig. 11a) large and fusiform: 2850–4310–5400 µm x 25–40 – 50 µm. Auxiliary small oxeas II (Fig. 11b): 470–686.6–960 µm x 10 –16.25–22.5 µm. Anatriaenes I (Fig. 11f): 7000–9400–11580 µm x 20 – 25.4–30 µm in size with long and thin clades: 150–167.7–200 µm; rhabdomes fusiform, thicker at the middle and filiform at the terminal part. Anatriaenes II: 2862.5–3647.8–4700 µm x 5–11 – 17.5 µm in size (Fig. 11e) with short clades: 20–47.5–70 µm and fusiform rhabdomes. Anatriaenes III (Fig. 11g): 3900–6620–9400 µm x 17.5–23.8–30 µm in size with thick clades: 75–110.6–140 µm; rhabdomes fusiform, thicker at middle and filiform at the terminal part. Protriaenes I (Fig. 11c): 3050– 4539.4–7200 µm x 12.5–14.7–20 µm, with clades: 50–121.3–200 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. 11d): 1450–2245 –2960 µm x 7.5–9.2– 12.5 µm, clades: 10–61.7–112.5 µm, usually one clade longer than the other two; rhabdomes tapering to a filiform end. Trichodal protriaenes (Fig. 11h) very small with filamentous rhabdomes: 425–551–675 µm x 2.5–2.6–3.75 µm long ...