C limbicrassus Black SEM a

SEM photo of Cretarhabdus limbicrassus from Black, 1972a (Pl. 16, Fig. 5)

Set number: 3024

  • Cretarhabdus limbicrassa 10342 1
  • Cretarhabdus limbicrassa 10344 2
  • Cretarhabdus limbicrassa 10346 3
  • Cretarhabdus limbicrassa 10352 4
  • Cretarhabdus limbicrassa 10343 5
  • Cretarhabdus limbicrassa 10345 6
  • Cretarhabdus limbicrassa 10347 7
  • Cretarhabdus limbicrassa 10350 8
  • Cretarhabdus limbicrassa 10356 9
  • Cretarhabdus limbicrassa 10348 10
  • Cretarhabdus limbicrassa 10355 11
  • Cretarhabdus limbicrassa 10351 12
  • Cretarhabdus limbicrassa 10349 13
  • Cretarhabdus limbicrassa 10354 14
  • Cretarhabdus limbicrassa 10353 15
    10µm
Cretarhabdus limbicrassus, Late Campanian, The specific location cannot be disclosed.
Final Epithet
Cretarhabdus limbicrassus (Reinhardt, 1964) Varol, n. comb.
Basionym

Stradneria limbicrassa Reinhardt, 1964

Synonyms

Cretarhabdella spectabilis Black, 1971a

Cretarhabdella lateralis Black, 1972a

Variants

Cretarhabdus biseriatus Forchheimer, 1972

Optical Properties

The entire species exhibits first-order, slightly greyish-white interference colours. The pelaga of Cretarhabdus limbicrassus exhibits a weak inclined extinction and length-slow (+) elongation in their natural settling position, in plan view under crossed polars.

Remarks

Species of Cretarhabdus are constructed of cretarhabdid shields and a tube cycle surrounding a large central area, with lateral bars delimiting approximately 20 or more pores in the outer cycle and an axial cross supporting a distal process.

References

Black, M. 1971a. Coccoliths of the Speeton Clay and Sutterby Marl. Proceedings of the Yorkshire Geological Society 38: 381-424.

Black, M. 1972a. British Lower Cretaceous Coccoliths. I-Gault Clay (Part 1). Palaeontographical Society Monograph. 126: 1-48.

Forchheimer, S. 1972. Scanning electron microscope studies of Cretaceous coccoliths from the Köpingsberg Borehole No. 1, SE Sweden. Sveriges Geologiska Undersökning, Series C. #668, 65: 1-141.

Reinhardt, P. 1964. Einige Kalkflagellaten-Gattungen (Coccolithophoriden, Coccolithineen) aus dem Mesozoikum Deutschlands. - Monatsberichteder Deutschen Akademieder Wissenschaftenzu Berlin. 6: 749-759.