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Orbitoclypeus

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Journal Article
Published: 01 October 2001
Micropaleontology (2001) 47 (4): 339-357.
... vertical sections. Thus, Discocyclina seunesi, Orbitoclypeus neumannae and Discocyclina sp. 1 have been identified and a new species, Orbitoclypeus haymanaensis, is erected. These assemblages were dated to Thanetian based upon the calcareous nannofossil and planktonic foraminifera identified...
Journal Article
Published: 01 April 1998
Journal of Foraminiferal Research (1998) 28 (2): 135-140.
Journal Article
Published: 01 July 2014
Journal of Foraminiferal Research (2014) 44 (3): 203-229.
... to the genus Discocyclina , was not studied. The orthophragminids in the late Paleocene–early Eocene interval in some of these deposits (sections B3, D5, D6, and D8) are represented by species of Discocyclina Gümbel, Orbitoclypeus Silvestri, and Nemkovella Less, reported for the first time from the southern...
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Journal Article
Published: 01 December 2006
Micropaleontology (2006) 52 (6): 485-520.
..., based on a large number of free specimens sectioned mainly in the equatorial plane, contributes to our knowledge about the orthophragmines in several aspects. They are of western Tethyan affinity and belong to the evolutionary lineages of the genera Discocyclina, Nemkovella, Orbitoclypeus...
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Types of embryon and their variation in  <b>Orbitoclypeus</b> varians, O.  aff.  O...
Published: 01 December 2006
TEXT-FIGURE 15 Types of embryon and their variation in Orbitoclypeus varians, O. aff. O. varians, Discocyclina radians, D. aff. D. samantai and D. euanensis. All ×40.
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Types of embryon and their variation in  <b>Orbitoclypeus</b> douvillei.  All ×40....
Published: 01 December 2006
TEXT-FIGURE 16 Types of embryon and their variation in Orbitoclypeus douvillei. All ×40.
Journal Article
Published: 01 January 2002
Journal of Foraminiferal Research (2002) 32 (1): 1-21.
..., but with orbitoidal growth. Both Setia and Orbitosiphon became extinct before the arrival of orthophragminids ( Discocyclina and Orbitoclypeus ) to the basin (together with Nummulites , Assilina and Alveolina ), and therefore are never found together with the latter. The reports of orthophragminids from the Lockhart...
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Journal Article
Published: 01 July 1997
Journal of Foraminiferal Research (1997) 27 (3): 175-185.
... and Nemkovella, as well as other orthophragminid genera such as Pseudophragmina and Orbitoclypeus, also have ribs as a specific character. Because Actinocyclina is characterized exclusively by the presence of ribs, and this is a specific character common to several genera, then Actinocyclina must be considered...
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All A-forms, ×30.  1–5  Asterocyclina sireli  n. sp., 1, O/ALM 6–79, vertic...
Published: 01 December 2006
Orbitoclypeus varians (Kaufmann) scalaris (Schlumberger), 7, O/ALM 11–64, vertical section; 8, O/ALM 11–111, external view. 9–11 Orbitoclypeus douvillei (Schlumberger) malatyaensis n. ssp., 9, O/KEÇ 1–66, vertical section; 10, O/KEÇ 1–67, vertical section; 11, O/KEÇ 1–68, external view. 12
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All A-forms and equatorial sections.  1–4  Nemkovella daguini  (Neumann), 1...
Published: 01 December 2006
Almela et Rios, 6, O/SAR 4–26. 10, O/KEÇ 1–9, ×40. 7–9 Discocyclina trabayensis Neumann elazigensis n. ssp., 7, O/KEÇ 9–12. 8, holotype, O/KEÇ 11–35; 9, O/KEÇ 4–39, ×40. 11 Discocyclina aff. augustae van der Weijden, O/SAR 9–37, ×40. 12,19 Orbitoclypeus varians (Kaufmann) ex. interc
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All equatorial sections.  1  Discocyclina pratti  (Michelin) ex. interc.  m...
Published: 01 December 2006
/KEÇ 11–26; A-form, ×20; 5, O/KEÇ 11–24, A-form, ×40; 6, O/KEÇ 11–24, A-form, ×20. 7 Orbitoclypeus furcatus indet. ssp., O/KEÇ 5–10, A-form, ×20. 8 Nemkovella strophiolata strophiolata (Gümbel), O/ALM 11–60, A-form, ×40. 9–11 Nemkovella strophiolata tenella (Gümbel), 9, O/KEÇ 4–16. 10, O
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1  Discocyclina tenuis  Douvillé, Eocene, Ypresian, Fontcouverte, France, U...
Published: 01 October 2017
Figure 5.  1 Discocyclina tenuis Douvillé, Eocene, Ypresian, Fontcouverte, France, UCL MF488. 2 Discocyclina prattii (Michelin), Eocene, Lutetian, west-southwest of Fontcouverte, Aude France, UCL MF489, A oblique axial section, B equatorial section; 3–4 Orbitoclypeus varians
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Embryon features and the development of annular chambers in late Paleocene ...
Published: 01 July 2014
Figure 19 Embryon features and the development of annular chambers in late Paleocene orthophragminids from section D5; sample 34: OZ 1; sample 38: OZ 1B. 1 Orbitoclypeus schopeni (Checchia-Rispoli), D5.34-3. 2 , 3 O. schopeni ramaraoi (Samanta): 2, D5.38-14; 3, D5.38-18. 4 – 9 O
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The morphologic and morphostructural features of orthophragminids and illus...
Published: 01 July 2014
Figure 4 The morphologic and morphostructural features of orthophragminids and illustrations of the parameters used in the description of taxa; scale bars = 200 μm. A External view of the test showing the distribution of granules (gr) in Orbitoclypeus haynesi (early Bartonian, Gökçeada
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Early Eocene orthophragminids from South Galala (1–12) and comparative spec...
Published: 01 July 2014
Figure 16 Early Eocene orthophragminids from South Galala (1–12) and comparative specimens of Nemkovella stockari , Orbitoclypeus schopeni , and Asterocyclina taramellii from Tunisia (13–16, 20–22) and Turkey (17–19): 1 – 4 Discocyclina archiaci bakhchisaraiensis Less, OZ 3: 1, 2, B3.41-11
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The paleogeographic distribution of Tethyan orthophragminids ( Discocyclina...
Published: 01 July 2014
Figure 20 The paleogeographic distribution of Tethyan orthophragminids ( Discocyclina seunesi , D. tenuis , D. archiaci , D. dispansa , Orbitoclypeus multiplicatus , O. schopeni , and Nemkovella stockari ) in ( A ) Thanetian and ( B ) early Eocene time. Early Eocene species
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Late Paleocene orthophragminids from South Galala.  1–4  Discocyclina seune...
Published: 01 July 2014
Figure 12 Late Paleocene orthophragminids from South Galala. 1–4 Discocyclina seunesi cf. beloslavensis Less & Özcan, OZ 1B: 1, D6.37-15; 2, D6.37-7; 3, 4, D8.20-19. 5 D. seunesi Douvillé, OZ 1B, B3.18-1. 6 , 7 Discocyclina tenuis Douvillé, OZ 1B, D6.45-1. 8 , 9 Orbitoclypeus
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Embryon features and the development of annular chambers in late Paleocene ...
Published: 01 July 2014
Figure 14 Embryon features and the development of annular chambers in late Paleocene orthophragminids from section D6. All belong to OZ 1B. 1 , 2 Orbitoclypeus schopeni cf. ramaraoi (Samanta): 1, D6.32-1; 2, D6.32-3. 3 , 4 Discocyclina seunesi cf. beloslavensis Less & Özcan: 3
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Late Paleocene and early Eocene orthophragminids from South Galala.  1 – 6 ...
Published: 01 July 2014
Figure 15 Late Paleocene and early Eocene orthophragminids from South Galala. 1 – 6 Orbitoclypeus aff. O. multiplicatus (Gümbel), OZ 1B: 1, 2, D8.20–23; 3, 4, D6.45-14; 5, 6, D6.45-10. 7 – 10 Nemkovella stockari cf. bejaensis n subsp., OZ 3: 7, 8, D8.38-2; 9, 10, D8.38-1. 11 , 12
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Embryon features and the development of annular chambers in late Paleocene ...
Published: 01 July 2014
Figure 17 Embryon features and the development of annular chambers in late Paleocene (1) and early Eocene (2–20) orthophragminids from Section B3 in OZ 1 and OZ 3, respectively. 1 Discocyclina seunesi Douvillé, B3.18-1. 2 , 7 Orbitoclypeus schopeni (Checchia-Rispoli): 2, B3.39-4; 7, B3.43