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750 Alfred Uchman, Andrzej Ślączka and Pietro Renda

Fig. 5. Faviradixus robustus sp. nov.

A – paratype, INGUJ183P8a; B – paratype in cross-section showing biocalcarenite in the filling and the “wall”, INGUJ 183P8b;
C – thin section from B

T y p e s p e c i e s. – Egadiradixus rectibrachiatus dis-
tinguished in this paper.

D i a g n o s i s. – Vertical, tapering down or
equidimensional shaft with simple, straight branches running
obliquely downwards. At least part of the branches display a
smaller dimension than the shaft.

R e m a r k s. – The morphology expressed in the diagno-
sis is unique, different from crustacean burrows, e.g.,
Ophiomorpha Lundgren, 1891, Psilonichnus Fürsich, 1981, or
Thalassinoides Ehrenberg, 1944 (e.g., Frey et al., 1984), the
only candidates among animal trace fossils. This structure can
be related to the taproots of higher plants.

Fig. 6. Rock surface with Faviradixus robustus sp. nov. Egadiradixus rectibrachiatus sp. nov.
in Punta Lungo, site 1 (Figs. 8 and 9)

D e r i v a t i o n o f n a m e. – From rectus (Latin) –
straight, and brachiatus (Latin) – having branches, in corre-
spondence to the general shape.