Material.—Numerous isolated and fragmentary tooth crowns, BGRX 12510–12512, Kłęby 1/37.

Remarks.—Isolated tooth crowns or tooth fragments are rather abundant in several layers of the drill core (Table 1). Isolated tooth crowns occur in every vertebrate−bearing sample sometimes in rather high numbers (Fig. 3L–N). This mostly taxonomically unidentifiable material is more numerous than the identifiable specimens indicating that the preservation of selachian material in the drill core is on the whole rather poor. Some of these tooth crowns resemble teeth of Parasymbolus and might indicate the presence of scyliorhinids (Fig. 3M). A few other neoselachian tooth types also occur (Fig. 3N). The presence of the relatively high number of isolated tooth crowns might be related to fungal borings since Mycelites attacks predominantly the roots resulting in their complete destruction. However, Martill (1989) also described selachian teeth from the Callovian of England with borings in the enameloid of the tooth crowns caused by Mycelites −like organisms.