Alievium incomptum Dumitrică, 2022

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 : 110-112

Alievium incomptum Dumitrică n. sp.

Fig. 8m

Description. Shell lenticular, triangular with short three-bladed spines at corners and slightly convex sides. Surface with well marked nodes interconnected by a network of thin bars forming triangular, quadrangular or irregular meshes, but not regular triangular ones, characteristic of other species.

Material. A single specimen, the holotype.

Holotype. Fig. 8m , sample OZ836, coll. MGP-PD, stub PD120 -OZ836- R07-26 .

Dimensions. Height of triangle 140-156 µm, maximum length of spines 40 µm.

Etymology. From the Latin incomptus, - a, - um – rough, due to its rough aspect.

Remarks. This species, represented only by the illustrated specimen, resembles Alievium antiguum Pessagno in shape and size, from which it differs by having the meshwork much larger, irregular and not consisting of only triangular meshes.

Occurrence. Found only in the cited sample.

Figures

Fig. 8. a - Becus coronatus Dumitrică n. sp., OZ839. b-f1, j - Becus triangulocentrum Dumitrică, b - OZ836; c - same, lateral view, d - OZ836. e, f - OZ825, f1 - lateral view of fig. f. g - Alievium regulare (Wu & Li), OZ836. h, i, k, l - Alievium rotundum Dumitrică n. sp.: h, specimen destroyed showing internal structure, OZ836; i - OZ836, k, l - holotype, OZ834. m - Alievium incomptum Dumitrică n. sp., OZ836. n - Godia (?) lenticulata Dumitrică n. sp., OZ834. o - Godia (?) lens Dumitrică n. sp., OZ825. p - Alievium eurasicum Dumitrică n. sp., OZ825. r - Microsandwichia plana (Hori), OZ834. s, t - Spumellarian gen. et sp. indet., OZ834. figs. c, e-h, k, m, r, t x250, figs. a, b, d, i, j, l, p, s x300; figs. n, o, t x400.