Acanella arbuscula

• Main Author: France, Scott C.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Anthozoa; Alcyonacea; Isididae; Acanella; Acanella arbuscula; Greenland; Lobos
• Online Access: https://doi.org/10.5281/zenodo.6044377; http://treatment.plazi.org/id/039D704E3816C223FF1D609C7C23F9AD

Acanella arbuscula (Johnson, 1862) Figures 4, 6, and 7 MoPsea arbusculum Johnson, 1862: 245, pl. 31, fig. 1,1a. MoPsea eburnea Pourtalès, 1868: 132. Isidella eburnea Gray, 1870: 15. Acanella normani Verrill, 1878: 212; Verrill, 1882: 315; Verrill, 1883: 14, pl. 4, figs. 2, 2a, 2b; Thomson, 1927: 27, pl. 1, fig. 21; pl. 5, fig. 2; Verrill, 1922: 44, pl. 16, figs. 2¯4; pl. 17, fig. 3¯3a; text-fig. 11. Acanella eburnea: Verrill, 1883: 16, pl 4, fig 5; Wright & Studer, 1889: 30; Studer, 1890: 86; Studer, 1901: 38; Nutting, 1908: 34; Kükenthal, 1919: 575; Deichmann, 1936: 245; Grant, 1975: 29, figs 25 and 26. Acanella sPiculosa Verrill, 1883: 17. Acanella arbuscula: Wright & Studer, 1889: 30; Kükenthal, 1919: 578, figs. 248¯249; pl. 44, fig. 75; Kükenthal, 1924: 420 Type: The original description for Mopsea arbusculum states, “A single example of this Coral was obtained from a fisherman at Cama de Lobos, Madeira, and is now in the British Museum” (Johnson, 1862 p. 246) from 20 fathoms. However the Natural History Museum, London, has type information for Acanella arbuscula as collected via trawl off the coast of Greenland in 1898 (Reg. no. 1898.5.5.85). We have not examined the type material. Diagnosis: Acanella with obliquely placed polyps (3̄ 8 mm) absent on lower parts but scattered to densely packed throughout colony proper and present on tips. Polyps less than 1 mm wide at base and generally funnel shaped with the proximal end being smaller than distal end. Long slender rods (1̄ 3 mm) arranged obliquely up polyp wall. Strongly projecting intertentacular sclerites, which extend beyond the base of the contracted tentacles by 500 µm. Coenenchyme very thin and containing needle-like sclerites (0.3 mm). Branching occurs at node dichotomously or in a whorl of two to six but most commonly two to four. Axis has long white internodes (3̄ 26 mm) and short dark brown nodes at base of the colony and longer nodes near tips. Colony can have a calcareous root-like base. Remarks: Colonies with sequence Haplotype A ...