Pyriporoides libita Gordon 1989

• Main Authors: Gordon, Dennis P., Taylor, Paul D.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Bryozoa; Gymnolaemata; Cheilostomatida; Calloporidae; Pyriporoides; Pyriporoides libita; Antipodes Island; Auckland Islands
• Online Access: https://doi.org/10.5281/zenodo.6043864; http://treatment.plazi.org/id/03A78782FFA2E47F80F44965FD9DFC3C

Pyriporoides libita (Gordon, 1989) (Fig. 6) Daisyella libita Gordon, 1989: 1325, figs 3A, B. Pyriporoides libita : Gordon et al . 2009: 289. Material examined. Holotype : NIWA 998 (H-536), NIC Wellington, Stn F 127, 49°22.0’ S, 176°16.0’ E, 1280 m, NE Campbell Plateau, 28 January 1965. Paratype : NIWA 999 (P-748), same data as for holotype. Other material : NIWA 95602, same data as for holotype; NIWA 95680 (with labelled specimen of P. circularis ), Stn T 39, 49.5033° S, 178.7433° E, 995 m, N of Antipodes Island, 14 March 1981; NIWA 23447, NIC Wellington, Stn TAN 0306 /6, 50.9427° S, 164.6092° E, 1105–1140 m, Christable Seamount, W of Auckland Islands, 14 April 2006. TAN 0307 / 79, 49.8105° S, 175.3216° W, 887–908 m, W of Bollons Seamount, 2 May 2003. Redescription. Colony comprising encrusting uniserial runners, zooids having a cruciform budding pattern with a lateral daughter zooid produced more or less at right angles from a pore-chamber on either side of the widest point of the zooidal dilatation (or budding is suppressed); no other lateral pore-chambers; total colony spread c . 14 mm. Autozooids elongate-pyriform–claviform, with a proximally tapered portion generally one-third total zooid length [ZL 610–905 (774); DL 456–661 (566); CL 106–333 (195); DW 300–389 (328)], the gymnocyst proximally and laterally extensive, sloping to the substratum. Opesia and cryptocystal shelf surrounded by a raised elongateoval cryptocystal rim, often highest proximally, which is minutely tubercular on the edge and inner face [CrL 243– 334 (289); CrW 149–223 (182)]. Proximal cryptocystal shelf about a third of the length of the oval cryptocystal rim, flat, gently sloping towards opesia, narrowing on each side towards opesial constriction, surface smooth. Opesia more or less dumbbell-shaped, constricted midlength by rounded projections that have a tubercular surface; distal (lower edge) and proximal opesial rims gently rounded, the proximal rim sometimes obliquely so [OpL 121– 169 (152)]. Operculum flap-like, occupying area of ...