Pseudoxitus Wu and Pessagno, 1993, 1988

Dumitrica, Paulian, Dieni, Iginio & Massari, Francesco, 2022, Valanginian Radiolarians Of Ne Sardinia (Italy) In The Frame Of The Weissert Event, Acta Palaeontologica Romaniae 18 (2), pp. 97-159 : 149

Genus Pseudoxitus Wu and Pessagno, 1993

Type species. Pseudoxitus inflatus Wu, 1993 .

Remarks. This genus is rather similar to Neorelumbra Kiessling, 1995 , from which it differs by lacking longitudinally elongated tubercles or ribs. Both have short conical or ovoidal shell with four or maximum five segments and the fourth segment with maximum diameter. By this last character they differ from Novixitus Pessagno, 1977 , that has a robust skeleton and the third segment tending to expand. It is possible that Aliev (1965, p. 60, pl. 11, fig. 4) illustrated a species of this genus as Lithocampe tumulata Aliev , but the specimen figured in its drawing is difficult to compare with those illustrated with electroscan technology. Moreover, the sizes he mentions for this species (length 308-354 µm, diameter 169-200 µm) are greater than those of all the congeneric species herein illustrated.

Range. Late Tithonian to late Barremian according to Kiessling ( 1995).