Filograna sollistima, Kočí, 2012

Kočí, Tomáš, 2012, Sabellidae And Serpulidae (Polychaeta, Canalipalpata) From The Locality Kaňk - Na Vrších In Kutná Hora (Upper Cenomanian - Lower Turonian, Bohemian Cretaceous Basin - The Czech Republic), Acta Musei Nationalis Pragae Series B 68 (1 - 2), pp. 7-14 : 9-10

Family: Serpulidae RAFINESQUE, 1815

Filograna BERKELEY, 1835

Filograna socialis (GOLDFUSS)

Pl. 1, fig. 5

1831 1845 1846 1875 1883 1961

1961

Serpula socialis nobis. – Goldfuss: p. 235, pl. 69, fig. 12 a-c. Serpula filiformis SOWERBY. – Reuss: p. 20, pl. 5, fig. 26.

Serpula filiformis SOWERBY. – Geinitz: p. 253, pl. 16, fig. 25. Serpula socialis GOLDFUSS. – Geinitz: p. 200, pl. 37, fig. 2. Serpula socialis GOLDFUSS. – Frič: fig. 113.

Sarcinella socialis (GOLDFUSS 1831) . – Regenhardt: pp. 29-30, pl. 1, fig. 5.

Filograna sollistima n. sp. – Regenhardt: p. 24, pl. 2, fig. 4.

1973

1978

1979 1983

1984

2005

Sarcinella socialis (GOLDFUSS) . – Ziegler: pp. 36-37, pl. 5, figs 4, 5, 6; pl. 6, fig. 1.

Sarcinella socialis (GOLDFUSS) . – Ziegler: pp. 219-221, pl. 50, fig. 4.

Filograna plexus (SOWERBY, 1829) . – Lommerzheim: p. 128. Filograna socialis (GOLDFUSS, 1831) . – Jäger: pp. 20-23, pl. 1, figs 3-8.

Sarcinella socialis (GOLDFUSS, 1831) . – Ziegler: pp. 219- 220, pl. 2, figs 7-8.

Filograna socialis (GOLDFUSS, 1831) . – Jäger: p. 135.

M a t e r i a l: Four free bundles found as loose specimens, 2 specimens in limestone.

D e s c r i p t i o n: Many tubes attached more or less parallel to eachother forming bundles. Tube circular. Surface smooth. Diameter of the tube 1.8 mm (sample in limestone), 1.2 mm in a bundle consisting of ca. 20 tubes collected in January 2006.

D i s c u s s i o n: In the BCB, this species is not typical for the nearshore facies, but it is typical for deeper environments in the Middle Turonian e.g. at the localities Dolánky near Turnov, Klokočské Loučky, Mladá Boleslav, Jizerní Vtělno, and Sychrov (see Ziegler 1973, 1978). These finds could probably indicate a deeper sea at this locality. Filograna filosa (DUJARDIN) has a similar habit, but can be distinguished by its smaller tube diameter (0.2-0.4 mm).

Neovermilia DAY, 1961

Neovermilia ex gr. ampullacea (SOWERBY)

Pl. 1, fig. 8

M a t e r i a l: One complete specimen attached to an oyster. Three poorly preserved specimens also attached to an oyster. Six fragments of tube.

D e s c r i p t i o n: The tube cross-section is subcircular. There is an indistinct very fine keel. The transversal ornamentation is very distinct and shows fine corrugations. The tube increases in diameter towards the anterior. Near the base of the tube a very distinct strong cellular layer is developed. The posterior portion of the tube forms a loop. Tube diameter 2.6 mm. Width of the tube´s base is 5 mm in the anterior portion. Lumen circular, 1.9 mm in diameter.

D i s c u s s i o n: The present tubes correspond well to the description given by Ziegler (1974), but these specimens from Kaňk have a cellular layer which is wider than the diameter of the tube at the base. There is pronounced variability within this species ( Jäger, 2005). Specimens from the nearshore facies of the BCB (e.g. Kaňk – Na Vrších, Velim – eastern part, Předboj near Prague) differ in their tube morphology from specimens found in the deeper water facies of the BCB (e.g. in the Upper Turonian of the working quarry at Úpohlavy near Lovosice). The genus Neovermilia bears shorter cells in the cellular layer than the genera Pomatoceros and Pyrgopolon . In the nearshore facies, a very fine but distinct longitudinal keel may be present (in the eastern part of the locality Velim and at Předboj near Prague) or may not (some specimens found at Kaňk – Na Vrších).

Dorsoserpula PARSCH, 1956

Dorsoserpula gamigensis (GEINITZ)

Pl. 1, fig. 6

1875

Serpula gamigensis GEINITZ. – Geinitz: pp. 286-287, pl. 63, figs 19-21.

M a t e r i a l: Single specimen.

D e s c r i p t i o n: Tube circular. A fine distinct undulated keel and two lateral keels are present. The posterior tube portion is coiled planispirally. The diameter of the planispiral is 3 mm, the diameter of the tube aperture is 1.6 mm. In the anterior tube portion, the transversal ornamentation consists of very fine incremental lines shaped like the letter V.

D i s c u s s i o n: A closely related species common in the Upper Cretaceous, especially in the Santonian and Campanian, was described by Jäger (1983) under the name Parsimonia wegneri nom. nov. This species usually lacks a true longitudinal keel. Later Jäger (2005) renamed that species Dorsoserpula wegneri and, moreover, erected a new subspecies, Dorsoserpula wegneri maastrichtensis , for specimens of Maastrichtian age differing from typical wegneri specimens by the presence of a longitudinal keel and by the presence of a cellular tube base. Dorsoserpula gamigensis also possesses a longitudinal keel.

Dorsoserpula cf. conjuncta (GEINITZ)

Pl. 1, fig. 7

1843

1849 1875

1969 1984

Serpula conjuncta GEINITZ – Geinitz: Nachtr. zur Charakt. IV, p. 7, pl. 4, figs 6-9.

Serpula conjuncta GEINITZ – Geinitz: p. 106.

Serpula conjuncta GEINITZ. – Geinitz: pp. 283-284, pl. 63, figs 6-9.

Serpula conjucta GEINITZ, 1846 – Ziegler: pp. 38-40, fig. 1. Serpula conjucta GEINITZ, 1846 – Ziegler: p. 223, pl. 3, fig. 2.

M a t e r i a l: Single specimen.

D e s c r i p t i o n: Tube diameter 9 to 11.4 mm. The tube wall is 2.3 mm thick. The present specimen resembles those described by Ziegler (1969), but it differs by the presence of a cellular layer which is very strongly developed and by dense transversal lines at the base of the middle portion of the tube.

D i s c u s s i o n: Because of the differences in morphology described above, a more precise determination than ' cf. conjuncta ' is not possible. The cellular layer may have enabled the specimen to live on the surface of a soft substrate.