Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 18. 1996. (Budapest, 1996)

Fig. 1. Sketch map showing the location of Szob sand pit. A small fragment of anterior fringe of Clavagella (Stirpulina) was found in the washed material of Szob. This taxa is a new element of the very rich mollusc fauna of the locality. Clavagellids are known as "watering pot" or "salt shaker" shells and they have "the most extraordinary shell form in the class Pelecypoda" (POJETA & SOHL, 1987). In accordance with this fact, it is absolutely unimaginable about the tiny snow-white fragment that it belongs to bivalves at first sight (Fig. 2; Pl. I: 1). The length of the tube-like specimen is about 0.41 mm, the diameter is about 0.13 mm, but it grows up about 0.16 mm before it bifurcates. One of the bifurcated branches is smaller in diameter (about 0.09 mm) and the other is broked down. The thickness of the tube at the base is about 0.0072 mm and as it can be seen on Fig. 2. of the Plate I., the tube consists of several thin lamellae. It is well visible at the center part of the fractured section but not so unambiguous at the outer and inner edge of the section. On the outer surface of the tube there are several shallow hollows, at which the outline is roughly circle-shaped (Pl. I: 3). The bottom of the hollows is not smooth, but bumpy just like it would consist of smaller units.