Nannotax3 - ntax_cenozoic - Acanthoica quattrospina

Citation: Acanthoica quattrospina Lohmann, 1903

Synonyms:

Acanthoica coronata Lohmann (1903) spines at one end only, but this is probably a result of incomplete coccosphere formation or of some spines falling off (Kleijne 1992).
Acanthoica brevispina Schiller 1913 [spine length is not useful criterion for species separation in Acanthoica - JRY]
Acanthoica quattrospina brevispina Schiller 1925 [spine length is not useful criterion for species separation in Acanthoica - JRY]
Acanthoica quattrospina mediterranea Lecal 1951
Anacanthoica caballicarus Lecal 1967 [described as being larger (coccoliths 3.5 µm) but with a similar number of elements, possibly a result of a miscalibrated magnification - JRY 2019]

Variants:
The following species were accepted by Kleijne (1992) in her review of the Rhabdosphaeraceae, but are very rarely recorded and difficult to separate from A. quattrospina. It is possible that some of them are merely variants of A. quattrospina.

Acanthoica janchenii (no slits between laths)
A. acanthifera (central protrusion),
A. biscayensis (larger and without slits)
Anacanthoica acanthos (spine coccoliths absent)

Distinguishing features:
Parent taxon (Acanthoica): Body coccoliths with well-developed radial lath cycle, low mound in centre; coccospheres polymorphic, usually some coccoliths with well-developed spines
This taxon: Body coccoliths sub-circular, (1.5-2.5 µm), with slits between radial cycle elements, lamellar cycle makes low cone. Long spines on polar coccoliths (one or both ends).

A very widespread species, although rarely abundant. It is often present in low diversity assemblages such as those of shelf seas.

HOL = Acanthoica quattrospina HOL, a form with affinities to Sphaerocalyptra, but which was never separately described (Cros et al. 2000). Very good combination coccosphere examples were illustrated by Supraha (2014)

Geological Range:
Last occurrence (top): Extant. Data source: present in the plankton (Young et al. 2003)
First occurrence (base): within Miocene Epoch (5.33-23.03Ma, base in Aquitanian stage). Data source: [JRY rough estimate]

References:

Cerino, F., Malinverno, E., Fornasaro, D., Kralj, M. & Cabrini, M. (2017). Coccolithophore diversity and dynamics at a coastal site in the Gulf of Trieste (northern Adriatic Sea). Estuarine Coastal and Shelf Science. 196: 331-345. gs

Cros, L. & Fortuño, J. -M. (2002). Atlas of northwestern Mediterranean coccolithophores. Scientia Marina. 66: 1-186. gs

Cros, L., Kleijne, A., Zeltner, A., Billard, C. & Young, J. R. (2000b). New examples of holococcolith-heterococcolith combination coccospheres and their implications for coccolithophorid biology. In, Young, J. R., Thierstein, H. R. & Winter, A. (eds) Nannoplankton ecology and palaeocology, Proceedings of the INA7 conference, Puerto Rico, February 1998. Marine Micropaleontology . 39(1-4): 1-34. gs

Kleijne, A. (1992). Extant Rhabdosphaeraceae (coccolithophorids, class Prymnesiophyceae) from the Indian Ocean, Red Sea, Mediterranean Sea and North Atlantic Ocean. Scripta Geologica. 100: 1-63. gs

Konno, S. & Jordan, R. W. (2006). Lagoon coccolithophorids from the Republic of Palau, NW Equatorial Pacific. Journal of Nannoplankton Research. 28(2): 95-110. gs O

Lecal, J. (1965). A propos des modalités d'élaboration des formations épineuses des Coccolithophoridés. Protistologica. 1: 63-70. gs

Lecal-Schlauder, J. (1951). Recherches morphologiques et biologiques sur les Coccolithophorides Nord-Africains. Annales de l'Institut Océanographique, Monaco & Paris. 26: 255-362. gs

Lohmann, H. (1903). Neue Untersuchungen über den Reichthum des Meeres an Plankton und über die Brauchbartkeit der verschiedenen Fangmethoden.Zugleich auch ein Beitrag zur Kenntnis des Mittelmeerauftriebs. Wissenschaftliche Meeresuntersuchungen Abteilung Kiel. 7: 1-87. gs

Malinverno, E., Leoni , B. & Galli, P. (2022). Coccolithophore assemblages and a new species of Alisphaera from the Faafu Atoll, Maldives, Indian Ocean. Marine Micropaleontology. 172(102110): 1-16. gs

Meier, K. J. S., Kinkel, H. & Young, J. R. (2014). A note on calcareous nannoplankton from the Kieler Förde (Baltic Sea). Journal of Nannoplankton Research. 33(1): 29-37. gs

Reid, F. M. H. (1980). Coccolithophorids of the North Pacific Central Gyre with notes on their vertical and seasonal distribution. Micropaleontology. 26(2): 151-176. gs

Samtleben, C. et al. (1995). Plankton in the Norwegian-Greenland Sea: from living communities to sediment assemblages - an actualistic approach. Geologische Rundschau. 84: 108-136. gs

Schiller, J. (1913). Vorläufige Ergebnisse der Phytoplankton-Untersuchungen auf den Fahrten S.M.S. Najade in der Adria 1911/12. I. Die Coccolitophoriden. Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften in Wien. 122(1): 597-617. gs

Schiller, J. (1925). Die planktonischen Vegetationen des adriatischen Meeres. A. Die Coccolithophoriden-Vegetation in den Jahren 1911-14. Archiv für Protistenkunde. 51: 1-130. gs

Skejic, S. et al. (2018). Coccolithophore diversity in open waters of the middle Adriatic Sea in pre- T and post-winter periods. Marine Micropaleontology. 143(1): 30-45. gs

Supraha, L., Ljubesic, Z., Mihanovic, H. & Henderiks, J. (2014). Observations on the life cycle and ecology of Acanthoica quattrospina Lohmann from a Mediterranean estuary. Journal of Nannoplankton Research. 34(S): 49-56. gs

Thomsen, H. A. (2016). Baltic Sea coccolithophores – an overview of insights into their taxonomy and ecology from the last 40 years. Journal of Nannoplankton Research. 36(2): 97-119. gs O

Yang, T. -N., Wei, K. & Wu, J. -T. (2012). Marine coccolithophores around Taiwan. Biodiversity Research Center, Academica Sinica, Taipei. 1-96. gs

Young, J. R., Geisen, M., Cros, L., Kleijne, A., Probert, I. & Ostergaard, J. B. (2003). A guide to extant coccolithophore taxonomy. Journal of Nannoplankton Research. S1: 1-132. gs

Acanthoica quattrospina

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