Palaeopsammia collignoni (Alloiteau, 1958)

Baron-Szabo, Rosemarie C., 2008, Dendrophylliina, Caryophylliina, Fungiina, Microsolenina, and Stylinina, Zootaxa 1952, pp. 1-244 : 36

Palaeopsammia collignoni (Alloiteau, 1958)

Pl. 2, figs 4a, b

v1958 Sakalavicyathus Collignoni nov. sp.: Alloiteau, p. 195, pl. 27, figs 10–17, 19.

2000 Sakalavicyathus collignoni, Alloiteau 1958 : Löser, p. 72.

v2002 Sakalavicyathus collignoni Alloiteau, 1958 : Baron-Szabo, p. 172, text-fig. 70.

Dimensions. d=2.5– 4 mm; s=32–42; h=up to 10 mm.

Description. Subceratoid-subcylindrical, circular in outline; costosepta arranged in 6 irregular systems; columella spongy-trabecular.

Remarks. Alloiteau (1958, p. 195–196) described the solitary genus Sakalavicyathus and stated that it was characterized by a subceratoid corallum, compact and radially arranged costosepta, with granulated lateral sides, the presence of pali, that are variable in number and shape, the presence of a columella formed by a small number of trabeculae, thin endothecal dissepiments, and a parathecal-synapticulothecal wall with intercostal pores. However, re-examination of the holotype revealed that higher cycle septa frequently merged with lower cycle ones, that the trabecular columella was well-developed, and that costae were rather represented by a linear arrangement of coarse granules. Therefore, together with the above mentioned charatceristics, Sakalavicyathus Alloiteau is considered a junior synonymy of the genus Palaeopsammia .

Type locality of species. Upper Maastrichtian of Madagascar .

Distribution. Upper Maastrichtian of Madagascar.