Alievium regulare (Wu & Li, 1982)

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 : 112

Alievium regulare (Wu & Li, 1982)

Figs. 8g

1973 Alievium sp. – Foreman, p. 262, pl. 9, figs. 1, 2.

1977b Alievium sp. A – Pessagno, p. 29, pl. 3, figs. 10, 18.

1980 Alievium helenae Schaaf – Baumgartner et al., p. 49, pl. 1, fig. 8.

1981 Alievium helenae Schaaf , p. 431, pl. 7, fig. 9, non pl. 10, figs. 2a-b (holotype).

1981 Alievium helenae Schaaf – Kocher, p. 53, pl. 12, fig. 6.

1981 Alievium sp. A . – Kanie et al., pl. 1, fig. 4

1982 Praeconocaryomma regularis Wu & Li , p. 65, pl. 1, figs. 2, 3.

1982 Alievium sp. A – Okamura & Uto, pl. 4, fig. 7; pl. 5, fig. 20.

1982 Alievium sp. – Okamura & Uto, pl. 6, figs. 13, 16.

1982 Alievium sp. – Matsuyama et al., p. 377, pl. 1, fig. 8. 1983 Alievium helenae Schaaf – Origlia-Devos, p. 114, pl. 13, fig. 6, non 7, 10.

1984 Alievium helenae Schaaf – Schaaf, p. 112-113, figs. 1-3, non h (holotype).

1984 Alievium helenae Schaaf – Baumgartner, p. 755, pl. 1, figs. 8-10.

1988 Alievium helenae Schaaf – Thurow, p. 397, pl. 9, fig. 9.

1989 Alievium helenae Schaaf – Tumanda, p. 34, pl. 1, fig. 9.

1992 Alievium helenae Schaaf – Ozvoldova & Petercakova, pl. 2, figs. 2, 7.

1992 Alievium helenae Schaaf – Steiger, p. 36, pl. 4, figs. 5, 6.

1992 Alievium helenae Schaaf – Matsuoka, p. 209, pl. 1, fig. 2.

1993 Alievium helenae Schaaf – Wu, p. 118, pl. 1, fig. 14. 1994 Alievium helenae Schaaf – Jud, p. 61, pl. 3, fig. 1.

1994 Alievium helenae Schaaf – O’Dogherty, p. 316, pl. 58, fig. 2.

1995 Alievium helenae Schaaf – Baumgartner et al., p. 80, pl. 3228, figs. 1, 3, 4, non 2 and 5.

1997 Alievium regulare (Wu & Li) – Dumitrică in Dumitrică et al., p. 79, pl. 2, fig. 7.

2009 Alievium regulare (Wu & Li) – Ishii et al., p. 341, pl. 4, fig. 1.

2014 Alievium regulare (Wu & Li) – Robertson et al., fig. 10(B), 7.

2017 Alievium regulare (Wu & Li) – Xu & Luo, fig. 3J,?3K.

2017 Alievium regulare (Wu & Li) – Wu et al., p. 347, figs. 1.8-10.

Dimensions. Height of triangle 96 µm.

Remarks. This species, as it is understood in the present paper (see synonymy), is polymorphous. Under its name, several morphotypes seem to be comprised. The simplest specimen is the one herein illustrated on Fig. 8g , with its small shell, small tubercles and no spines on tubercles. Being so simple, it is, probably, a young specimen. Other specimens mentioned in the synonymy list have bigger or very big tubercles prolonged or not into spines of very variable length. These specimens seem to represent different ontogenetic stages, although it is also possible to represent local variations. To solve this problem, we need rich assembleges with rather well-preserved specimens as those studied by Dumitrică ( 1997).

Range and occurrence. Tithonian to Hauterivian or later, cosmopolitan.

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.