Citation: Streptochilus pristinum Brönnimann & Resig 1971Rank: speciesType specimens: MO 688752 Type age (chronostrat): Age of the holotype is middle Miocene (N. 13); age range of the species is lower Miocene (N. 4)—middle miocene (Lower N.15).Type locality: Location of holotype is DSDP Hole 62.1 on the Eauripik Rise (1° 52.2'N, 141° 56'E, 2591 meters)from a core depth of about 325 meters. At this location, the species ranges only down into the middle Miocene (upper N. 13). Older specimens occur in strata of the Ontong Java Plateau, Hole 64.1 (1° 44.5'S, 158°
36.5'E, 2052 meters; core depth 460 meters)Type repository: Washington; USNM
Original Description Test biserial, with no chamber inflation in the early stage, and with slight inflation of the later chambers;aperture a narrow high arch with a collar at the outer margin and the opposite margin inturned to form a ramp to the collar of the previous aperture; wall smooth, porous. Size: Length of holotype 180 microns, maximum breadth of holotype 76 microns; length of the species ranges from 125 to 250 microns, maximum breadth is 100 microns. Etymology: Extra details from original publication
Editors' Notes Orthography: Streptochilus is a neuter noun (Smart & Thomas 2018, p.501) so the correct form of the species name is pristinum, as per the original description, although it has sometimes been given as pristinus.
Brönnimann, P. & Resig, J. (1971). A Neogene globigerinacean biochronologic time-scale of the southwestern Pacific. Initial Reports of the Deep Sea Drilling Project. 7(2): 1235-1469. gsVO
Smart, C. W. & Thomas, E. (2018). Taxonomy, biostratigraphy, and phylogeny of Oligocene Streptochilus. In, Wade, B. S., Olsson, R. K., Pearson, P. N., Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 46(Chap 19): 495-511. gsVO
Streptochilus pristinum compiled by the pforams@mikrotax project teamviewed: 26-9-2022