Clausotrypa Bassler 1929

Ernst, Andrej, Wyse Jackson, Patrick N. & Aretz, Markus, 2015, Bryozoan fauna from the Mississippian (Visean) of Roque Redonde (Montagne Noire, southern France), Geodiversitas 37 (2), pp. 151-213 : 176

Genus Clausotrypa Bassler 1929

[= Nemacanthopora Termier & Termier, 1971 ]

TYPE SPECIES. — Clausotrypa separata Bassler, 1929 by original designation. Lower Permian ; Timor ( Indonesia).

DIAGNOSIS. — Branched colonies; autozooecia elongated-tubular with rare diaphragms; autozooecial apertures rounded or oval; tectitozooecia common, irregular, closed by laminated skeleton near colony surface; acanthostyles on the surface common; autozooecial walls laminated, having dark serrated boundaries.

OCCURRENCE. — Carboniferous – Permian; Europe, Asia.

COMPARISON

Clausotrypa Bassler, 1929 differs from Nematotrypa Bassler, 1911 in absence of hemiphragms and budding pattern of autozooecia, which bud from a distinct median axis in Nematotrypa . Nemacanthopora Termier & Termier, 1971 was separated from Clausotrypa because of its shape of autozooecia (shorter vs longer autozooecia in Clausotrypa ). However, this character is quite subjective and inconsistent within species placed to both genera, and, apparently depends on the branch diameter. Therefore, Nemacanthopora is assigned as junior synonym of Clausotrypa .