Trematooecia osburni Marcus, 1955

Trematooecia osburni Marcus, 1955: 311, figs 91–93. [Espírito Santo, Brazil]

Trematooecia osburni: Vieira et al. 2008: 29 . [Brazil; checklist]

Remarks. We have examined Canada-Balsam slide mounts deposited at MZUSP that are too poorly preserved for adequate redescription. Trematooecia osburni has encrusting colonies, only marginal frontal-shield pores, a transversely D-shaped primary orifice without condyles, a non-tubercular secondary orifice, elliptical frontal avicularia, spatulate interzooidal avicularia and no suboral avicularia (Marcus 1955).

The species resembles T. aviculifera, T. protecta and T. ridleyi in having encrusting colonies, a subglobose ooecium and an ectooecium with a circular frontal membranous area, but differs in lacking peristomial tubercles and a suboral avicularium. Trematooecia osburni is known only from the type locality in Brazil. According to Marcus (1955) colonies are white and were found encrusting another bryozoan at 35 m depth.

Distribution. Atlantic: Brazil.