Bathycyathus piveteaui ( Alloiteau & Tissier, 1958 )

Baron-Szabo, Rosemarie C., 2008, Dendrophylliina, Caryophylliina, Fungiina, Microsolenina, and Stylinina, Zootaxa 1952, pp. 1-244 : 54-55

Bathycyathus piveteaui ( Alloiteau & Tissier, 1958)

Text-Fig. 4

(v)*1958 Kionotrochus piveteaui nov. sp.: Alloiteau & Tissier, p. 275, pl. 1, figs 4–4b’.

(v)1969 Platycyathus eburnensis n. sp.: Barta-Calmus, p. 822, pl. 1, figs 1–2a.

(v)1969 Frescocyathus tessieri n. sp.: Barta-Calmus, p. 823, pl. 1, fig. 3, text-figs 1a–c.

(v)1969 Frescocyathus nagagreboensis n. sp.: Barta-Calmus, p. 823, pl. 1, figs 4, 5, 10, 11.

Dimensions. d (max.)=6.4–18.7 mm; d (min.)=5.5– 19 mm; d (min)/d (max)=0.61–0.96; s (adult)=96+s6.

Description. Variably conical-trubinate, slightly elliptical to compressed in outline; costosepta developed in 5 complete cycles in 6 systems in corallites that have a maximum diameter of around 13 mm and larger; columella formed by a small number of twisted segments.

Remarks. The merging of the above taxa is based on the idea that they represent different ontogenetical stages of the same species, according to which the forms B. eburnensis , B. tessieri , and B. nagagreboensis are more adult stages (corallite diameters ranging between d (min) of 10–18 and d (max) of 12 and 18 mm, 96 septa) and the species B. piveteaui represents a juvenile image (corallite diameter of 5.5 x 6.4 mm and 48 septa).

Type locality of species. Danian of Belgium .

Distribution. Paleocene of Ivory Coast, Danian of Belgium.