Vieira, L. M.; Stampar, S. N. (2014). A new Fenestrulina (Bryozoa, Cheilostomata) commensal with tube-dwelling anemones (Cnidaria, Ceriantharia) in the tropical southwestern Atlantic. Zootaxa. 3780(2): 365-374.

175793

10.11646/zootaxa.3780.2.8 [view]

Vieira, L. M.; Stampar, S. N.

2014

3780(2): 365-374

Publication

A new species of cheilostome bryozoan, Fenestrulina commensalis n. sp., was collected in December 2008 by scuba at 5–10 meters depth at Guaibura Beach, Guarapari, Espírito Santo state, southeastern Brazil. The specimen was found as- sociated with tubes of the cerianthid Pachycerianthus sp., representing the first commensal association between a bryo- zoan and a tube-dwelling anemone. Fenestrulina commensalis n. sp. is the third species of the genus found in Brazilian waters; it is distinguished from other Atlantic species of Fenestrulina by its small angular orificial condyles, a single oral spine and basal anchoring rhizoids arising from abfrontal pore chambers. Morphological adaptations to encrust the tubes of cerianthids include anchoring rootlets and weakly contiguous zooids. These morphological features allow the colony the flexibility to grow around the tube and feed relatively undisturbed by silt and detritus, being raised well above the soft- sediment substratum in which the tube-anemone grows.

West Tropical Atlantic

Systematics, Taxonomy

Ectoprocta

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