Ankozany, Sakamena sediments of the Majunga Basin, Madagascar Early Triassic (Triassic to of Madagascar)

Where: Madagascar (14.6° S, 48.2° E: paleocoordinates 45.2° S, 39.9° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Dienerian to Dienerian (250.5 - 247.2 Ma)

• Stage: Nammalian = Induan = Olenekian = Smithian = Dienerian

• group-level stratigraphic resolution

Environment/lithology: lagoonal; black, gray, sandy shale

• From Early Permian times onwards, continental sedimentation was repeatedly influenced or interrupted by marine ingressions documented by the presence of brackish water horizons and shallow marine deposits.

•The lower and middle part of the Sakamena section is a black argillaceous shale which contains nodules and a few thin sandstone beds. Above an unexposed interval a grey sandy shale occurs immediately below the Isalo sandstone.

•Deposition of the Sakamena shale occurred probably in a lagoonal or tidal flat environment.

Size class: microfossils

Collection methods: chemical, mechanical,

Primary reference: O. Hankel. 1993. Early Triassic plant microfossils from Sakamena sediments of the Majunga Basin, Madagascar. Review of Palaeobotany and Palynology 77:213-233 [C. Looy/W. Puijk/W. Puijk]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 31351: authorized by Cindy Looy, entered by Wilma Puijk on 08.05.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Simeonospora khlonovae, Limatulasporites fossulatus, "Spore" "sp. A", "Spore" "sp. B", Michrystridium spp.
"Spore" "sp. A"
sp. A, also ref 30388
"Spore" "sp. B"
sp. B, also ref 30388
 Life -
Veryhachium sp.
Veryhachium sp. Deunff 1954 acritarchs
Schizosporis
  -
Schizosporis spp.
Schizosporis spp. Cookson and Dettmann 1959
Algae
  - Zygnemataceae
Tetraporina sp.
Tetraporina sp. Naumova 1950
Protohaploxypinus
  -
Protohaploxypinus spp.
Protohaploxypinus spp. Samoilovitch 1953
Equisetopsida
 Cupressales - Pinidae
Inaperturopollenites nebulosus
Punctatisporites
  -
Punctatisporites fungosus
Brevitriletes
  -
Brevitriletes bulliensis
Bryopsida
  -
Stereisporites spp.
Pinopsida
 Pinales - Taxaceae
Striatopodocarpites spp.
Striatopodocarpites spp. Sedova 1956 yew
 Coniferales - Podocarpaceae
Platysaccus leschikii, Platysaccus spp.
Platysaccus spp. Naumova 1954 podocarp
Peltacystia
  -
Peltacystia sp.
Peltacystia sp. Balme and Segroves
Densosporites
  -
Densosporites sp.
Densosporites sp. Berry 1937
Cycadopites
  -
Cycadopites follicularis
Cycadopites follicularis Wilson and Webster 1946
Lycopsida
  -
Uvaesporites sp., Kraeuselisporites cuspidus, Kraeuselisporites saeptatus, Kraeuselisporites spp.
Uvaesporites sp. Döring 1965
Polypodiopsida
 Gleicheniales - Polypodiidae
Dictyophyllidites mortonii
Dictyophyllidites mortonii Playford and Dettmann 1965
Pteridopsida
  -
Osmundacidites wellmanii, Osmundacidites senectus
Lunatisporites
  -
Lunatisporites noviaulensis, Lunatisporites pellucidus, Lunatisporites spp.
Lycopodiopsida
 Selaginellales -
Densoisporites complicatus, Densoisporites nejburgii, Densoisporites playfordii, Densoisporites spp.
Densoisporites spp. Dettmann 1963 clubmoss
 Selaginellales - Selaginellaceae
Perotrilites sp.
Perotrilites sp. Couper 1953 spikemoss
Fimbriaesporites
  -
Fimbriaesporites sp.
Alisporites
  -
Alisporites spp.
Alisporites spp. Daugherty 1941
 Life -
Leiosphaeridia spp.
Leiosphaeridia spp. Eisenack 1958
Aratrisporites
  -
Aratrisporites spp.
Aratrisporites spp. Kräusel and Leschik 1956
Lundbladispora
  -
Lundbladispora spp.