Tubulifloridites viteauensis

Name

Tubulifloridites viteauensis

Rank

Species

Generic Name

[Genus] Tubulifloridites

Authors (Pub.)

Barreda V. D.  

Publication

Late Oligocene?-Miocene pollen of the families Compositae, Malvaceae and Polygonaceae from the Chenque Formation, Golfo San Jorge Basin, southeastern Argentina [1994/1]

Journal

Palynology

Annee/Jahrgang

1993

Volume

17

Page number

176

Year

1994

Fossil Status

sporae dispersae (pollen)

Stratigraphy

Chattian

Strat. comment

Miocene / Chenque Formation

Location

Chenque section, Comodoro Rivadavia, Chubut, Golfo San Jorge Basin, southeastern Argentina

Paleoregion

America (South)

Data for Holotypus

Repository

Unidad Paleobotánica y Palinológica, Centro de Investigaciones en Recursos Geológicos (CIRGEO), Buenos Aires, Argentina

Repository Number

Specimen on slide CIRGEO Palin 844, coordinates 36.0, 94.9

Num

plate 3, figs. 1, 3

Pub.

Late Oligocene?-Miocene pollen of the families Compositae, Malvaceae and Polygonaceae from the Chenque Formation, Golfo San Jorge Basin, southeastern Argentina [1994/1]

Data for Isotypus

Repository

Unidad Paleobotánica y Palinológica, Centro de Investigaciones en Recursos Geológicos (CIRGEO), Buenos Aires, Argentina

Repository Number

Specimen on slide CIRGEO Palin 844, coordinates 46.6, 96.4; plate 3, fig. 5; Specimen on slide CIRGEO Palin 921, coordinates 27.5, 93.0; plate 3, fig. 2.

Num

plate 3, fig. 2, 5

Pub.

Late Oligocene?-Miocene pollen of the families Compositae, Malvaceae and Polygonaceae from the Chenque Formation, Golfo San Jorge Basin, southeastern Argentina [1994/1]

Diagnosis

Pollen grains free, isopolar, tricolporate, echinate, subprolate to spheroidal. Amb subcircular to slightly trilobulate, outline oval in equatorial view. Colpi long, extend about 3/4-4/5 the polar diameter, apocolpia small, thickened margins distinct, reaching a maximum thickness at the equator. Ora large, lalongate, clearly dis- cernible, 2.5-4.5 um wide and 5.7-11 um long. Exine 3.5- 6 um thick at the equator and thinning towards the poles and colpi. Nexine and sexine clearly differentiated. Nexine 0.5-1.5 um but it thickens near the colpi margins. Sexine 3-4.5 um thick. Columellate layer composed of digitating columellae, with maximum thickness at the intercolpi (1.7 um) thinning gradually towards apertural regions. Basal layer difficult to discern (less than 0.5 um thick). Tectum thick, massive 1.7-2.5 um thick, with rugose surface and low spines, generally less than 1 um high, 1-2.5 gm in basal diameter, 1-6 um apart.