Zygothuria Perrier, 1898

Gebruk, Andrey V., Solis-Marin, Francisco A., Billett, David S. M., Rogacheva, Antonina V. & Tyler, Paul A., 2012, Review of the genus Zygothuria Perrier, 1898 and the Atlantic group of species of the genus Mesothuria Ludwig, 1894 (Synallactidae: Holothuroidea) with description of the new species Mesothuria milleri sp. nov., Journal of Natural History 46, pp. 265-348 : 309-310

Genus Zygothuria Perrier, 1898

Zygothuria – Perrier, 1898: 1665; 1899: 245–246, 1902: 321–322; Deichmann, 1930: 108.

Diagnosis

Modified from Perrier (1902): body ovoid, flattened, but with well-differentiated sole; integument often wrinkled. Tubefeet arranged exclusively in single or double row along ventrolateral ambulacra, placed on sole margin, which often forms fringe. Tubefeet widely spread, may be quite big; dorsal papillae minute, not numerous, irregularly distributed or arranged in two simple rows, sometimes totally absent. Twenty tentacles, rarely 13–19; no tentacle ampullae; madreporite placed close to body wall, without penetrating it. Mouth ventral or terminal, anus terminal, without special arrangement. Calcareous ring with triangular radial segments. Ossicles of integument three-pillar (rarely four-pillar) tables; close to middle of their length pillars are linked by transverse beams; pillars merge on top forming spire.

Type species

Zygothuria lactea (Théel, 1886) designated by Hérouard (1902).

Other included species

Zygothuria candelabri ( Hérouard, 1923) , Z. connectens Perrier, 1902 , Z. marginata (Sluiter, 1901) , Z. oxysclera Perrier, 1902 and Z. thomsoni (Théel, 1886) .