Citation: Sphaeroidinella rutschi Cushman & Renz 1941Rank: speciesType specimens: pl. 4, fig. 5· Fig. 5a-b, : no. 35914. Type sample (& lithostrat): Upper Agua Salada formation, Zone 4 (Zone of Marginulina basispinosa and Robulus senni ); fide Renz, personal communication.] Type age (chronostrat): Lowermost-Middle Miocene.Type locality: sample L. P. 165 - collected by. Dr. P. Leuzinger. Isidro, 33.5 km. East (79° 45') of Pueblo Piritu, District Zamura, State Falcon, Venezuela.
Type repository: USNM
Original Description Test trochoid, subglobular, dorsal side with the spire depressed, periphery broadly rounded, slightly lobate; chambers strongly inflated, 3 or 4 making up the adult whorl; sutures slightly if at all depressed; wall smooth, very coarsely perforate; aperture in a deep depression between the two last-formed chambers, the periphery slightly raised and lip-like. Size: Diameter 0.40-0.45 mm. Etymology: Extra details from original publication This species differs from S. dehiscens (Parker and Jones) in its smaller size, more globular form, and the failure to develop deep grooves along the sutures.
Stratigraphic occurrence: Lower and Upper Agua Salada Formation (Zones 2-4). Editors' Notes
Cushman, J. A. & Renz, H. H. (1941). New Oligocene-Miocene foraminifera from Venezuela. Contributions from the Cushman Laboratory for Foraminiferal Research. 17: 1-27. gsVO
Sphaeroidinella rutschi compiled by the pforams@mikrotax project teamviewed: 30-9-2022