Pyrgopolon (Septenaria), 1961

Kočí, Tomáš & Jäger, Manfred, 2015, Sabellid And Serpulid Worms (Polychaeta, Canalipalpata, Sabellida, Sabellidae, Serpulidae) From The Rocky Coast Facies (Late Cenomanian) At Předboj Near Prague, Acta Musei Nationalis Pragae Series B 71 (1 - 2), pp. 31-50 : 39-40

Pyrgopolon (Septenaria) sp.

Pl. 2, Fig. 10

2012c Pyrgopolon (Septenaria) sp. 2 – Kočí, p. 126, fig. 1M–N.

M a t e r i a l: One fragment of the posterior tube portion.

S u b s t r a t e: The former substrate of this Pyrgopolon tube is unknown, but in turn the Pyrgopolon tube was used as a substrate for two juvenile serpulid tubes described above as Placostegus sp.

D e s c r i p t i o n. The formerly attached tube portion is 6.4 mm wide (measured at the base) and 5 mm high. It bears five straight strong but rounded keels, of which the median one is the strongest and widest, two are in an upper/lateral position and two are in a lower lateral position, situated slightly above the tube’s base. Otherwise the tube’s surface is smooth.

R e m a r k s a n d r e l a t i o n s h i p s. The wide and rounded median keel resembles that of Pyrgopolon subgen. et sp. indet., but the chevron pattern is not developed or not well developed, and the other keels are more distinctly developed.