Exidmonea sp.

Zágoršek, Kamil & Gordon, Dennis P., 2013, Late Tortonian bryozoans from Mut Basin, Central Anatolian Plateau, southern Turkey, Acta Palaeontologica Polonica 58 (3), pp. 595-607 : 596-597

Exidmonea sp.

Fig. 1A .

Material.—One fragment (PM2−T 1124) of a large bifurcating colony with the gonozooecium extending across ten autozooecial fascicles.

Remarks.—The Turkish specimen very much resembles Exidmonea atlantica David, Mongereau, and Pouyet (1972) as illustrated by Zágoršek (2010a) from Moravia. However, the size and shape of the gonozooecium is much smaller in the Moravian material (extending only across five autozooecial fascicles). The size and shape of the gonozooecium is very similar to the specimen described by Hayward and McKinney (2002: fig. 49H) as Exidmonea triforis (Heller, 1867) from Rovinj in the Adriatic Sea, which was never reported from fossil sequences. The gonozooecium is unusually large for any fossil known species. Because only one specimen has been found, the exact determination remains uncertain.

http://dx.doi.org/10.4202/app.2011.0100

Figures

Fig. 1. Late Tortonian bryozoans from the Başyayla section. A. Exidmonea sp. (PM2−T1124) with very extended frontal gonozooecium from sample BAS 2. B–E. Biflustra savartii auctt. B. PM2−T1127, frontal view of colony, sample BAS 8. C. PM2−T1126, abfrontal view showing three rows of autozooecia with characteristic angled appearance, sample BAS 8. D. PM2−T1125, lateral view of the three autozooecia showing regularly distributed lateral communication pores, sample BAS 4. E. PM2−T1129, detail of lateral communication pores showing multiporous septula, sample BAS 4. F–H. Margaretta sp. F. PM2−T1130, external view showing concealed ovicells (visible as bulges in frontal shield), sample BAS 8. G. PM2−T1131, internal view showing peristomial chamber, with an ascopore situated in the midline of the frontal shield, sample BAS 11. H. PM2−T1132, detail of the aperture of a colony showing linear structures in the peristomial wall, sample BAS 7. I. Margaretta cereoides (Ellis and Solander, 1786) (PM2−P1939) from section Hlohovec (Moravia) showing the smooth interior surface of the peristome. Scale bars A, B, F, 1 mm; C–E, G–I, 100 µm.