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Malvacipolloides comodoroensis
Malvacipolloides comodoroensis Barreda Palynology, 1993, 17: 178. 28 Jan 1994
- Name
- Malvacipolloides comodoroensis
- Rank
- Species
- Generic Name
- [Genus] Malvacipolloides
- 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
- 178
- Year
- 1994
- Fossil Status
- sporae dispersae (pollen)
- Stratigraphy
- Miocene
- Strat. comment
- Chenque Formation
- Location
- Cañadón Baumann section, approximately 25.5 km NNW of 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 959, coordinates 33.0, 100.3
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 957, coordinates 31.4, 106.6
- Diagnosis
- Pollen grains free, isopolar, tricolporate, echinate, spheroidal, outline circular in all views. Colpi short, 4-5 um long, extending slightly beyond the margins of the ora. Ora circular, small, 1-1.7 um in diameter, strongly endoannulate, 1.2-1.7 um thick. Exine 1.4-1.7 um thick, nexine 0.9-1.1 um; thicker than the sexine. Sexine consists of a thin, 0.3-0.4 jim, and homogeneous columellate layer composed of evenly distributed single columellae, thickening up to 0.4-0.6 um underneath the spines, forming micromammiform bases or slightly raised undulation. Tectum very thin, scabrate to slightly microgranulate. Spines isodiametric, 1.2-2.2 um, or slightly higher than wider; with bulbous bases and sharply pointed tips; densely disposed, 0.5-1.7 apart.
