Umbellula thomsoni Kölliker, 1874

Risaro, Jessica & Abstract, Daniel Lauretta, 2023, Sea Pens (Cnidaria: Octocorallia: Pennatuloidea) From The Mar Del Plata Submarine Canyon And Outskirts, Zootaxa 5389 (4), pp. 401-433 : 419

Umbellula thomsoni Kölliker, 1874

Figures 10 , 11 , 12

Figures

FIGURE 10. Umbellula thomsoni. A) General aspect of a complete colony after being fixed in ethanol. B) Detail of the distal cluster with its different types of polyps. Abbreviations: Aut: autozooids; Cl: cluster; Ped: peduncle; Rac: rachis; Siph: siphonozooids.

FIGURE 11. SEM micrographs of cross-section of the central axis of U. thomsoni. It shows the same form and dimensions throughout the entire length. A) Proximal, between peduncle and rachis. B) Distal, from the most distal region of the colony.

FIGURE 12. SEM micrographs of the diversity of sclerites of U. thomsoni. A-B) Sclerites from autozooids column. C-F) Sclerites from autozooids tentacles. G-H) Sclerites from rachis.