Praeconocaryomma bajaensis Whalen

Cifer, Tim, Goričan, Špela, Gawlick, Hans-Jürgen & Auer, Matthias, 2020, Pliensbachian, Early Jurassic radiolarians from Mount Rettenstein in the Northern Calcareous Alps, Austria, Acta Palaeontologica Polonica 65 (1), pp. 167-207 : 176-177

Praeconocaryomma bajaensis Whalen in Goričan et al., 2006

Fig. 7J–N.

1989 Praeconocaryomma spp. ; Hattori 1989: pl. 9: M.

1996 Praeconosphaera sphaeroconus ( Yang, 1993) ; Pujana 1996: 136, pl. 1: 21.

1997 Praeconocaryomma sp. A ; Yao 1997: pl. 1: 32.

2002 Praeconocaryomma sp. A ; Whalen and Carter 2002: 108, pl. 8: 8.

2003 Praeconocaryomma spp. ; Goričan et al. 2003: 291, pl. 1: 14 (only).

2006 Praeconocaryomma bajaensis Whalen sp. nov.; Goričan et al. 2006: 322, pl. PRY05: 1–9.

2011 Praeconocaryomma bajaensis Whalen in Goričan et al., 2006; Bandini et al. 2011: pl. 9: 19.

Material.— Sample Rö40: stub Rö40_1(ten specimens); sample Rö97: stub Rö97_4 (six specimens), Mount Rettenstein , Northern Calcareous Alps, Austria, Lower Pliensbachian .

Remarks.— Praeconocaryomma bajaensis as defined by Whalen in Goričan et al. (2006) shows a considerable variability in the size and arrangement of pores. The same variability is also obvious in our material (note that the illustrated specimens in Fig. 7J–N are from the same sample). In all specimens the mammae are larger than in a closely similar Praeconocaryomma whiteavesi Carterin in Carter et al., 1988.

Stratigraphic and geographic range.—Pliensbachian to Aalenian ( Carter et al. 2010). Worldwide.