Protozoa - Spumellaria - Praeconocaryommidae
Named by Whalen.
Original description: Test spherical with large, closely spaced porous mammae that comprise a large part of the total surface area. Surfaces of mammae rounded, penetrated by many small circular pores centered around a small rod-like spine. Pores in intermammary area generally small, very irregular in shape. Outermost medullary shell with variably-sized pentagonal pore frames. Thin triradiate beams connect medullary shell with mammae on cortical shell.
Original remarks: This form is similar to Praeconocaryomma whiteavesi Carter but differs in having less numerous but much larger mammae and correspondingly smaller intermammary areas with smaller pores.
Etymology: Named for Baja California Sur, Mexico.
Full reference: S. Gorican, E. S. Carter, P. Dumitrica, P. A. Whalen, R. S. Hori, P. De Wever, L. O'Dogherty, A. Matsuoka, and J. Guex. 2006. Catalogue and systematics of Pliensbachian, Toarcian and Aalenian radiolarian genera and species 446
Belongs to Praeconocaryomma according to S. Gorican et al. 2006
Sister taxa: Praeconocaryomma californiaensis, Praeconocaryomma copiosa, Praeconocaryomma decora, Praeconocaryomma hexagona, Praeconocaryomma jiangzeensis, Praeconocaryomma lipmanae, Praeconocaryomma mamillaria, Praeconocaryomma matsuokai, Praeconocaryomma media, Praeconocaryomma parvimamma, Praeconocaryomma sarahae, Praeconocaryomma scatebra, Praeconocaryomma splendida, Praeconocaryomma universa, Praeconocaryomma vivenkensis, Praeconocaryomma yakounensis
Type specimen: USNM 401912 (pl. PRY05, fig. 1).
Ecology: passively mobile planktonic omnivore
Distribution:
• Jurassic of Canada (11: British Columbia collections), Japan (2), Mexico (1), Slovenia (1)
Total: 15 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.