Craniella polyura

• Main Authors: Dinn, Curtis, Edinger, Evan, Leys, Sally P.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2019
• Subjects: Biodiversity; Taxonomy; Animalia; Porifera; Demospongiae; Tetractinellida; Tetillidae; Craniella; Craniella polyura; Canada; Frobisher Bay; Hill Island; Breitfuss
• Online Access: https://zenodo.org/record/5189304; https://doi.org/10.5281/zenodo.5189304

Craniella polyura (Schmidt, 1870) Figure 7; Table 7 Synonymy: Tetilla polyura Schmidt, 1870:66 pl. VI, fig 8. Vosmaer 1885: 9–10, pl. I, fig 1–3, pl. II, fig. 16, pl. V, figs 3–7. Breitfuss 1911: 213. Rezvoi 1928: 76. Koltun 1966: 60–61, fig. 31 Van Soest 2016: 322, fig. 5. Lophurella lophura Gray, 1872: 460 –461. Polyurella schmidtii Gray, 1870: 311 –312. Craniella polyura: Morozov et al. 2019: 21, fig. 13. Dinn & Leys 2018: 87. Van Soest et al. 2000. Material examined. CMNI 2018-0184, specimen in 95% ethanol, collected by Curtis Dinn by Agassiz trawl; July 15, 2017, 141 m depth (63° 38.390’ N, 68° 37.642’ W) operated from the CCGS Amundsen, Frobisher Bay, Canada. Description. One specimen was collected in inner Frobisher Bay near Hill Island. The specimen is ovoid, 3 cm tall by 1.5 cm wide (Fig. 7A). The surface is optically smooth with small furrows, giving a somewhat dimpled appearance. A root section ~ 0.5 cm long is visible on the underside of the specimen, but this portion may have been damaged upon collection and so could be longer in life. The sponge is a light brown colour, lightening towards the root (Fig. 7A). The sponge had a soft consistency when it was collected but became hard after preservation in ethanol. The spicules consist of large oxeas that are often thicker on one end 2206 (1610–3453) x 28 (15–41) µm, and short, very thin oxeas are 441 (251–1199) x 9 (4–17) µm long. There are also protriaenes that have a shaft length of 1905 (888–5879) x 16 (8–29) µm, with one whip-like clad 105 (36–183) µm long. Protrianes can have clads of equal lengths or have one long whip-like clad. Here the two protriaene variations are considered as one spicule type. Anatriaenes are uncommon compared to oxeas and protriaenes (only one was found fully intact with a length of 7017 µm); the shaft width is 14 (8–20) µm n=20, and the clads are 77 (57–94) µm; sigmaspires with a centrotylote swelling are 13 (10–18) µm in length. (Fig. 7 B–F). Genetic data. 28S rDNA sequences group this specimen with Cinachyra and ...