Discoaster premicros

de Kaenel & Bergen in de Kaenel et al., 2017 Jan 31, 2025

Set number: 685

  • Discoaster premicros VR 19125 1
  • Discoaster premicros VR 19163 2
  • Discoaster premicros VR 19166 3
  • Discoaster premicros VR 19165 4
  • Discoaster premicros VR 19124 5
  • Discoaster premicros VR 19167 6
  • Discoaster premicros VR 19164 7
  • Discoaster premicros VR 19162 8
  • Discoaster premicros VR 19153 9
  • Discoaster premicros VR 19152 10
  • Discoaster premicros VR 19149 11
  • Discoaster premicros VR 19159 12
  • Discoaster premicros VR 19154 13
  • Discoaster premicros VR 19151 14
  • Discoaster premicros VR 19150 15
  • Discoaster premicros VR 19155 16
  • Discoaster premicros VR 19158 17
  • Discoaster premicros VR 19157 18
  • Discoaster premicros VR 19156 19
  • Discoaster premicros VR 19148 20
  • Discoaster premicros VR 19147 21
  • Discoaster premicros VR 19145 22
  • Discoaster premicros VR 19136 23
  • Discoaster premicros VR 19135 24
  • Discoaster premicros VR 19133 25
  • Discoaster premicros VR 19132 26
  • Discoaster premicros VR 19131 27
  • Discoaster premicros VR 19134 28
  • Discoaster premicros VR 19119 29
  • Discoaster premicros VR 19120 30
  • Discoaster premicros VR 19121 31
  • Discoaster premicros VR 19122 32
  • Discoaster premicros VR 19123 33
  • Discoaster premicros VR 19127 34
  • Discoaster premicros VR 19128 35
  • Discoaster premicros VR 19129 36
  • Discoaster premicros VR 19130 37
  • Discoaster premicros VR 19139 38
  • Discoaster premicros VR 19138 39
  • Discoaster premicros VR 19137 40
  • Discoaster premicros VR 19160 41
  • Discoaster premicros VR 19161 42
  • Discoaster premicros VR 19144 43
  • Discoaster premicros VR 19143 44
  • Discoaster premicros VR 19142 45
  • Discoaster premicros VR 19141 46
  • Discoaster premicros VR 19140 47
    10µm
ODP Leg 154, Hole 926C, Ceará Rise, western equatorial Atlantic.

Set number: 686

  • Discoaster premicros 27171 1
  • Discoaster premicros 27172 2
  • Discoaster premicros 27170 3
  • Discoaster premicros 27168 4
    10µm
DSDP Leg 25, Site 242, Mozambique Channel (Davie Ridge), Indian Ocean
Final Epithet
Discoaster premicros de Kaenel & Bergen in de Kaenel et al., 2017
Basionym

Discoaster premicros de Kaenel & Bergen in de Kaenel et al. 2017

Synonyms

2008 Discoaster cf. D. lidzi Denne, p. 238, pl. 1, fig. 4

Description

Emended Description: Six segmented discoasters have short, robust arms with a wide bifurcation. The inter-arm area is narrow and V-shaped. Wide proximal ridges decorate the gently bulged proximal side, whilst the distal side is smooth without any decoration.

Remarks

Discoaster premicros differs from Discoaster leios by having gently bulged proximal side and V-shape inter-arm areas, whereas the latter has a strongly bulged proximal side and rounded inter-arm areas.

References

De Kaenel, E., Bergen, J. A., Browning, E., Blair, S. A. & Boesiger, T.M. 2017. Uppermost Oligocene to Middle Miocene Discoaster and Catinaster taxonomy and stratigraphy in the circum North Atlantic Basin, Gulf of Mexico and ODP Leg 154. Journal of Nannoplankton Research, 37 (2-3): 215–244.

Denne, R. A., 2008. Utilizing abundance changes of new and non-standard calcareous nannofossil taxa to increase biostratigraphic resolution in expanded continental margin deposits: Examples from the Middle and Lower Miocene of the Gulf of Mexico. Transactions of the Gulf-Coast Association of Geological Societies 58, 227-239.

Varol, O. 1984. New Neogene calcareous nannofossil taxa from Malta and southern Turkey. Neues Jahrbuch für Geologie und Paläontologie, Monatshefte, 6: 375–384.

Taxonomy
Discoaster
Biostratigraphy
  • Phanerozoic
    • Cenozoic
      • Neogene
        • Miocene
          • Middle Miocene
            • Langhian
Stratigraphic Range
Langhian
Age (Ma)
15.93 - 14.35
Zone(s)
NN4 - NN5
Holotype
Discoaster premicros VR 19160 Discoaster premicros VR 19160

Discoaster premicros de Kaenel & Bergen in de Kaenel et al., 2017

Middle Miocene

ODP Leg 154, Site 925C, Ceara Rise, Equatorial Atlantic Ocean