Praeconocaryomma copiosa Wu, 1986

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

Praeconocaryomma copiosa Wu, 1986

Fig. 7p

1986 Praeconocaryomma copiosa Wu , p. 357, pl. 2, figs. 18, 23.

Description. Shell small, spherical with characteristic praeconocaryommid structure and pointed pyramidal tubercles. From each tubercle radiate usually 5 rays. Network rather loose with relatively wide rounded triangular, quadrangular or pentagonal meshes.

Studied material. A single specimen in sample OZ836, coll. MGP-PD, stub PD120-OZ836-R07-23.

Dimensions. Diameter 120 μm.

Remarks. Species very rare. The specimen resembles perfectly the holotype from probably Aptian of Tibet.

Range and occurrence. Probably Aptian of Tibet and upper Valanginian of Sardinia .

Figures

Fig. 7 a - Praeconosphaera sphaeroconus (Rüst OZ826. b-d - Praeconosphaera antiqua (Parona): b - OZ834, c - OZ838, d - OZ825. e - Tritrabs ewingi (Pessagno), arm in lateral view, OZ836. f-h - Emiluvia chica Foreman, OZ836; f - face view, g - lateral view from a spine, h - lateral view of a broken specimen showing the medullary test. i - Pantanellium sp. 1, OZ825. j, l-n1 - Pantanellium squinabolli (Tan): j - OZ834; l, m - OZ834, n - OZ836; m1, n1, details of inner wall of pores. k - Pantanellium sp. 2, OZ834. o – Pantanellium cf. squinaboli (Tan), OZ836; p - Praeconocaryomma copiosa Wu, OZ836. r - Praeconocaryomma thurowi Dumitrică n. sp., OZ836. s, t - Triactoma tithonianum Rüst, side views; s - OZ834, broken off specimen showing medullary shell; t - OZ825, equatorial view, t1 – face view; s1, t2 - detail of the base of spines of figs. s and t, respectively, x800. Figs. a-h, l-n x200; i-k, o-r x300; s, t x400, m1, n1 x500.