Set number: 1363

  • Cruciplacolithus tenuis 21703 1
  • Cruciplacolithus tenuis 21705 2
  • Cruciplacolithus tenuis 21708 3
  • Cruciplacolithus tenuis 21710 4
  • Cruciplacolithus tenuis 21702 5
  • Cruciplacolithus tenuis 21704 6
  • Cruciplacolithus tenuis 21707 7
  • Cruciplacolithus tenuis 21709 8
    10µm
Cruciplacolithus tenuis, Early Paleocene, DSDP Leg 25, Site 245A, Mozambique Channel (Davie Ridge), Indian Ocean

Set number: 1361

  • Cruciplacolithus tenuis 42669 1
  • Cruciplacolithus tenuis 42667 2
  • Cruciplacolithus tenuis 42672 3
  • Cruciplacolithus tenuis 42675 4
  • Cruciplacolithus tenuis 42670 5
  • Cruciplacolithus tenuis 42668 6
  • Cruciplacolithus tenuis 42671 7
  • Cruciplacolithus tenuis 42673 8
    10µm
Cruciplacolithus tenuis, Early Paleocene, Kokaksu, Zonguldak, Turkey

Set number: 1362

  • Cruciplacolithus tenuis 22221 1
  • Cruciplacolithus tenuis 22218 2
  • Cruciplacolithus tenuis 22222 3
  • Cruciplacolithus tenuis 21710 4
  • Cruciplacolithus tenuis 22220 5
  • Cruciplacolithus tenuis 22219 6
  • Cruciplacolithus tenuis 22223 7
  • Cruciplacolithus tenuis 22224 8
    10µm
Cruciplacolithus tenuis, Late Paleocene, DSDP Leg 25, Site 245A, Mozambique Channel (Davie Ridge), Indian Ocean

Set number: 1360

  • Cruciplacolithus tenuis 45622 1
  • Cruciplacolithus tenuis 45626 2
  • Cruciplacolithus tenuis 45619 3
  • Cruciplacolithus tenuis 45617 4
  • Cruciplacolithus tenuis 45621 5
  • Cruciplacolithus tenuis 45625 6
  • Cruciplacolithus tenuis 45620 7
  • Cruciplacolithus tenuis 45616 8
    10µm
Cruciplacolithus tenuis, Late Paleocene, DSDP Leg 39, Sites 354, Ceará Rise, North Atlantic Ocean

Set number: 1356

  • Cruciplacolithus tenuis 50518 1
  • Cruciplacolithus tenuis 50515 2
  • Cruciplacolithus tenuis 50519 3
  • Cruciplacolithus tenuis 50522 4
  • Cruciplacolithus tenuis 50517 5
  • Cruciplacolithus tenuis 50516 6
  • Cruciplacolithus tenuis 50520 7
  • Cruciplacolithus tenuis 50521 8
    10µm
Cruciplacolithus tenuis, Late Paleocene, Santos Basin, Brazil

Set number: 1357

  • Cruciplacolithus tenuis 50412 1
  • Cruciplacolithus tenuis 50409 2
  • Cruciplacolithus tenuis 50414 3
  • Cruciplacolithus tenuis 50420 4
  • Cruciplacolithus tenuis 50411 5
  • Cruciplacolithus tenuis 50410 6
  • Cruciplacolithus tenuis 50415 7
  • Cruciplacolithus tenuis 50417 8
  • Cruciplacolithus tenuis 50419 9
  • Cruciplacolithus tenuis 50418 10
    10µm
Cruciplacolithus tenuis, Late Paleocene, Santos Basin, Brazil

Set number: 1358

  • Cruciplacolithus tenuis 50290 1
  • Cruciplacolithus tenuis 50286 2
  • Cruciplacolithus tenuis 50291 3
  • Cruciplacolithus tenuis 50294 4
  • Cruciplacolithus tenuis 50289 5
  • Cruciplacolithus tenuis 50287 6
  • Cruciplacolithus tenuis 50292 7
  • Cruciplacolithus tenuis 50293 8
    10µm
Cruciplacolithus tenuis, Late Paleocene, Santos Basin, Brazil

Set number: 1359

  • Cruciplacolithus tenuis 49686 1
  • Cruciplacolithus tenuis 49683 2
  • Cruciplacolithus tenuis 49690 3
  • Cruciplacolithus tenuis 49685 4
  • Cruciplacolithus tenuis 49684 5
  • Cruciplacolithus tenuis 49688 6
    10µm
Cruciplacolithus tenuis, Late Paleocene, Santos Basin, Brazil
Final Epithet
Cruciplacolithus tenuis (Stradner, 1961 ) Hay & Mohler in Hay et al., 1967
Basionym

Heliorthus tenuis Stradner, 1961

Synonyms

Coccolithus helis Stradner in Gorbhardt, 1963

Cruciplacolithus notus Perch-Nielsen, 1977a

Description

Large (>7.0µm] species of Cruciplacolithus has an axial cross with disjunct feet-like extensions where they meet the tube cycle.

Romein, 1979 re-analysed the holotype and amended the description of Cruciplacolithus tenuis to include feet-like extensions. The original publication fails to recognise the feet-like extensions. Romein (personal com. on 23 Jan 2022) re-confirmed that Dr H. Stradner kindly provided the type slide with the marked location of the holotype of Cruciplacolithus tenuis.

The lectotype designated by Stradner et al., 2010 is superfluous because they do not provide any other information than the lectotype photo.

References

Gohrbandt, K., 1963. Zur Gliederung des Palaogen im Helvetikum nordlich Salzburg nach planktonischen Foraminiferen. Mitteilungen der Geologischen Gesellschaft in Wien 56, 1-116.

Hay, W. W., Mohler, H. P., Roth, P. H., Schmidt, R. R., Boudreaux, J. E., 1967. Calcareous nannoplankton zonation of the Cenozoic of the Gulf Coast and Caribbean-Antillean area, and transoceanic correlation. - Transactions of the Gulf-Coast Association of Geological Societies 17, 428-480.

Perch-Nielsen, K.,1977a. Albian to Pleistocene calcareous nannofossils from the Western South Atlantic, DSDP Leg 39. Initial Reports of the Deep Sea Drilling Project. 39, 699-823.

Stradner, H., 1961. Vorkommen von Nannofossilien im Mesozoikum und Alttertiär. Erdoel-Zeitschrift 77(3), 77-88.

Stradner, H., Aubry, M. -P., Bonnemaison, M., 2010. Calcareous nannofossil type specimens in the collection of the Geological Survey of Austria: A taxonomic and stratigraphic update. Jahrbuch der Geologischen Bundesanstalt 150(1-2), 9-84.