Palaeothalomnus Deflandre, 1973

Noble, Paula, Aitchison, Jonathan C., Danelian, Taniel, Dumitrica, Paulian, Maletz, Jörg, Suzuki, Noritoshi, Cuvelier, Jessie, Caridroit, Martial & O’Dogherty, Luis, 2017, Taxonomy of Paleozoic radiolarian genera, Geodiversitas 39 (3), pp. 419-502 : 455

Palaeothalomnus Deflandre, 1973

Palaeothalomnus Deflandre, 1973b: 497 ; 1973a: 290 (nomen nudum).

TYPE SPECIES. — Palaeothalomnus antiquus Deflandre, 1973 ( Deflandre 1973a: 290, pl. 1, fig. 1-2).

AGE AND LOCATION OF TYPE MATERIAL. — Visean (Lower Carboniferous), Cabrières, Hérault, Montagne Noire, France.

TAXON CODE. — 152.

STATUS. — Valid.

DIAGNOSIS. — “Spicule siliceux à n branches cylindriques issues d’un point central; chaque branche ou actine porte un verticille irrégulier d’épines assez longues et variées, ou parfois un bouquet de cornes.” ( Deflandre 1973b: 497).

DIAGNOSIS (English translation by J. P. Caulet – RadWorld database). — “Siliceous spicule with cylindrical branches arising from a central point; each branch bears a vertical of irregular spines, long and various, or sometimes a bunch of spinules.”

REMARKS

Personal observations made by the coauthor (Dumitrica) of Deflandre’s material indicate that this genus should be placed in the family Paleoscenidiidae . The spicule has a very short median bar. From one end of MB radiate 4 spines of which 2 are long and equal, one is shorter and obliquely upward directed, and one short also, simple, obliquely downward. From the other end radiate two long spines equal with the long spines from the opposite end, and, it seems, a short spine below. All spines except the two short spines downwardly directed bear a bunch of spinules.