Discoaster self-trailiae

Varol & Bowman, 2024 Jan 31, 2025
D self trialiae b

D self trialiae a

Set number: 3872

  • Discoaster self trailliae 32149 1
  • Discoaster self trailliae 32070 2
  • Discoaster self trailliae 32044 3
  • Discoaster self trailliae 32146 4
  • Discoaster self trailliae 32143 5
  • Discoaster self trailliae 32069 6
  • Discoaster self trailliae 32045 7
  • Discoaster self trailliae 32144 8
  • Discoaster self trailliae 32096 9
  • Discoaster self trailliae 32116 10
  • Discoaster self trailliae 32040 11
  • Discoaster self trailliae 32118 12
  • Discoaster self trailliae 32105 13
  • Discoaster self trailliae 32115 14
  • Discoaster self trailliae 32041 15
  • Discoaster self trailliae 32117 16
  • Discoaster self trailliae 32121 17
  • Discoaster self trailliae 32127 18
  • Discoaster self trailliae 32125 19
  • Discoaster self trailliae 32059 20
  • Discoaster self trailliae 32062 21
  • Discoaster self trailliae 32074 22
  • Discoaster self trailliae 32077 23
  • Discoaster self trailliae 32078 24
  • Discoaster self trailliae 32122 25
  • Discoaster self trailliae 32123 26
  • Discoaster self trailliae 32124 27
  • Discoaster self trailliae 32126 28
  • Discoaster self trailliae 32128 29
  • Discoaster self trailliae 32129 30
  • Discoaster self trailliae 32052 31
  • Discoaster self trailliae 32053 32
  • Discoaster self trailliae 32054 33
  • Discoaster self trailliae 32055 34
  • Discoaster self trailliae 32056 35
  • Discoaster self trailliae 32057 36
  • Discoaster self trailliae 32047 37
  • Discoaster self trailliae 32048 38
  • Discoaster self trailliae 32049 39
  • Discoaster self trailliae 32050 40
  • Discoaster self trailliae 32051 41
  • Discoaster self trailliae 32061 42
  • Discoaster self trailliae 32063 43
  • Discoaster self trailliae 32064 44
  • Discoaster self trailliae 32065 45
  • Discoaster self trailliae 32066 46
  • Discoaster self trailliae 32067 47
  • Discoaster self trailliae 32068 48
  • Discoaster self trailliae 32071 49
  • Discoaster self trailliae 32072 50
  • Discoaster self trailliae 32073 51
  • Discoaster self trailliae 32075 52
  • Discoaster self trailliae 32079 53
  • Discoaster self trailliae 32080 54
  • Discoaster self trailliae 32081 55
  • Discoaster self trailliae 32082 56
  • Discoaster self trailliae 32083 57
  • Discoaster self trailliae 32084 58
  • Discoaster self trailliae 32085 59
  • Discoaster self trailliae 32086 60
  • Discoaster self trailliae 32087 61
  • Discoaster self trailliae 32088 62
  • Discoaster self trailliae 32089 63
  • Discoaster self trailliae 32090 64
  • Discoaster self trailliae 32091 65
  • Discoaster self trailliae 32092 66
  • Discoaster self trailliae 32093 67
  • Discoaster self trailliae 32094 68
  • Discoaster self trailliae 32097 69
  • Discoaster self trailliae 32098 70
  • Discoaster self trailliae 32099 71
  • Discoaster self trailliae 32100 72
  • Discoaster self trailliae 32101 73
  • Discoaster self trailliae 32102 74
  • Discoaster self trailliae 32103 75
  • Discoaster self trailliae 32104 76
  • Discoaster self trailliae 32109 77
  • Discoaster self trailliae 32110 78
  • Discoaster self trailliae 32111 79
  • Discoaster self trailliae 32112 80
  • Discoaster self trailliae 32113 81
  • Discoaster self trailliae 32114 82
  • Discoaster self trailliae 32131 83
  • Discoaster self trailliae 32132 84
  • Discoaster self trailliae 32134 85
  • Discoaster self trailliae 32135 86
  • Discoaster self trailliae 32136 87
  • Discoaster self trailliae 32137 88
  • Discoaster self trailliae 32138 89
  • Discoaster self trailliae 32139 90
  • Discoaster self trailliae 32140 91
  • Discoaster self trailliae 32141 92
  • Discoaster self trailliae 32142 93
  • Discoaster self trailliae 32150 94
  • Discoaster self trailliae 32151 95
  • Discoaster self trailliae 32152 96
  • Discoaster self trailliae 32153 97
  • Discoaster self trailliae 32154 98
  • Discoaster self trailliae 32155 99
  • Discoaster self trailliae 32156 100
    10µm
Discoaster self-trailiae, Middle Miocene, USGS-NASA Langley Core, Hampton, VA (USA)

Holotype in the mobile mount
Final Epithet
Discoaster self-trailiae Varol & Bowman, 2024
Basionym

Discoaster self-trailiae Varol & Bowman, 2024

Diagnosis

The hexagonal species have segments with very short arms, distinct ridges with a petaloid knob on the proximal side and sutural ridges created by the deep cavities on the distal side. The sutural ridges are raised towards the centre and capped by boomerang-shaped distal covers.

Etymology

In honour of Dr Jean Self-Trail, Nannofossil specialist, Geological Survey, Reston, VA, USA.

Dimensions Of Holotype

Maximum diameter: 7.74 µm, Diameter of central area: 5.20 µm, Length of the arms: 1.27 µm, Maximum height: 4.59 µm, Diameter of petaloid proximal knob: 3.33 µm, Hight of the petaloid knob: 1.16 µm (measurements from bright field micrograph).

Remarks

Discoaster self-trailiae differs from Discoaster artatus, Discoaster virginianus and its variant, Discoaster gamberi, by having a petaloid proximal knob. In contrast, Discoaster artatus lacks a proximal knob, and Discoaster virginianus has a hexagonal proximal knob.

References

Varol, O. & Bowman, A. R. 2024. The New Middle Miocene Genus Olladiscoaster, and Related and Associated Discoasters. Grzybowski Foundation Special Publication, 28: 1-103 pp.

Taxonomy
Discoaster
Biostratigraphy
  • Phanerozoic
    • Cenozoic
      • Neogene
        • Miocene
          • Middle Miocene
            • Serravalian
Stratigraphic Range
Serravalian
Zone(s)
NN5 - NN6
Age (Ma)
13.72 - 13.00
Holotype
Discoaster self trailiae 32156 Discoaster self trailiae 32156 Discoaster self trailiae 32156 Discoaster self trailiae 32156

Discoaster self-trailiae Varol & Bowman, 2024

Middle Miocene

USGS-NASA Langley Core, Hampton, VA (USA)