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Selenopemphix islandensis sp. nov.: a new organic-walled dinoflagellate cyst from the Lower Pliocene Tjörnes beds, northern Iceland

Koen Verhoeven UGent and Stephen Louwye UGent (2012) PALYNOLOGY. 36(1). p.10-25
abstract
A new protoperidiniacean dinoflagellate cyst species recorded from the Lower Pliocene Serripes Zone of the Tjornes beds in northern Iceland is formally described and its palaeoecological preferences are evaluated. Selenopemphix islandensis sp. nov. is a thin-walled cyst with strong polar compression and a reniform outline in apical view. The wide cingular margins are dorsally ornamented with processes of varying morphology and ventrally with large fan-shaped processes. A distinct size difference between the dorsal and ventral cingular processes is a major diagnostic characteristic of this species. A differential diagnosis for Selenopemphix islandensis sp. nov. is presented. Within the Tjornes section, Selenopemphix islandensis sp. nov. is restricted to the uppermost Serripes Zone of the Tjornes beds. The base of this zone corresponds to the invasion of cold-water molluscs of Pacific affinity through the Bering Strait into the northern Atlantic. The sudden appearance of Selenopemphix islandensis sp. nov. from this level can possibly be related to this northern migration through the Bering Strait, and suggest a Pacific origin. The new species is not recorded in the underlying Lower Pliocene Tapes Zone and Mactra Zone of the Tjornes beds, and is also absent in the superjacent Pleistocene Breidavik Group. Selenopemphix islandensis sp. nov. has a first and last appearance in the Tjornes region at c. 4.5 Ma and 4.2 Ma, respectively. Palaeoecological studies on molluscs, ostracods, plants and oxygen isotopes indicate an average summer temperature of 5-10 degrees C for the Serripes Zone, which is comparable to the present-day situation in northern Iceland.
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author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
taxonomy, PLEISTOCENE SEDIMENTS, Iceland, Tjo¨ rnes, Selenopemphix, Bering Strait, dinoflagellate cysts, Pliocene, EASTERN ENGLAND, SEA BASIN, ATLANTIC, MIOCENE, PALEOECOLOGY, STRATIGRAPHY, ASSEMBLAGES, MOLLUSKS, ZONATION
journal title
PALYNOLOGY
Palynology
volume
36
issue
1
pages
10 - 25
Web of Science type
Article
Web of Science id
000304459500002
JCR category
PALEONTOLOGY
JCR impact factor
1.348 (2012)
JCR rank
21/50 (2012)
JCR quartile
2 (2012)
ISSN
0191-6122
DOI
10.1080/01916122.2011.593573
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1944250
handle
http://hdl.handle.net/1854/LU-1944250
date created
2011-11-18 15:30:44
date last changed
2012-10-19 14:21:05
@article{1944250,
  abstract     = {A new protoperidiniacean dinoflagellate cyst species recorded from the Lower Pliocene Serripes Zone of the Tjornes beds in northern Iceland is formally described and its palaeoecological preferences are evaluated. Selenopemphix islandensis sp. nov. is a thin-walled cyst with strong polar compression and a reniform outline in apical view. The wide cingular margins are dorsally ornamented with processes of varying morphology and ventrally with large fan-shaped processes. A distinct size difference between the dorsal and ventral cingular processes is a major diagnostic characteristic of this species. A differential diagnosis for Selenopemphix islandensis sp. nov. is presented. Within the Tjornes section, Selenopemphix islandensis sp. nov. is restricted to the uppermost Serripes Zone of the Tjornes beds. The base of this zone corresponds to the invasion of cold-water molluscs of Pacific affinity through the Bering Strait into the northern Atlantic. The sudden appearance of Selenopemphix islandensis sp. nov. from this level can possibly be related to this northern migration through the Bering Strait, and suggest a Pacific origin. The new species is not recorded in the underlying Lower Pliocene Tapes Zone and Mactra Zone of the Tjornes beds, and is also absent in the superjacent Pleistocene Breidavik Group. Selenopemphix islandensis sp. nov. has a first and last appearance in the Tjornes region at c. 4.5 Ma and 4.2 Ma, respectively. Palaeoecological studies on molluscs, ostracods, plants and oxygen isotopes indicate an average summer temperature of 5-10 degrees C for the Serripes Zone, which is comparable to the present-day situation in northern Iceland.},
  author       = {Verhoeven, Koen and Louwye, Stephen},
  issn         = {0191-6122},
  journal      = {PALYNOLOGY},
  keyword      = {taxonomy,PLEISTOCENE SEDIMENTS,Iceland,Tjo{\textasciidieresis} rnes,Selenopemphix,Bering Strait,dinoflagellate cysts,Pliocene,EASTERN ENGLAND,SEA BASIN,ATLANTIC,MIOCENE,PALEOECOLOGY,STRATIGRAPHY,ASSEMBLAGES,MOLLUSKS,ZONATION},
  language     = {eng},
  number       = {1},
  pages        = {10--25},
  title        = {Selenopemphix islandensis sp. nov.: a new organic-walled dinoflagellate cyst from the Lower Pliocene Tj{\"o}rnes beds, northern Iceland},
  url          = {http://dx.doi.org/10.1080/01916122.2011.593573},
  volume       = {36},
  year         = {2012},
}

Chicago
Verhoeven, Koen, and Stephen Louwye. 2012. “Selenopemphix Islandensis Sp. Nov.: a New Organic-walled Dinoflagellate Cyst from the Lower Pliocene Tjörnes Beds, Northern Iceland.” Palynology 36 (1): 10–25.
APA
Verhoeven, Koen, & Louwye, S. (2012). Selenopemphix islandensis sp. nov.: a new organic-walled dinoflagellate cyst from the Lower Pliocene Tjörnes beds, northern Iceland. PALYNOLOGY, 36(1), 10–25.
Vancouver
1.
Verhoeven K, Louwye S. Selenopemphix islandensis sp. nov.: a new organic-walled dinoflagellate cyst from the Lower Pliocene Tjörnes beds, northern Iceland. PALYNOLOGY. 2012;36(1):10–25.
MLA
Verhoeven, Koen, and Stephen Louwye. “Selenopemphix Islandensis Sp. Nov.: a New Organic-walled Dinoflagellate Cyst from the Lower Pliocene Tjörnes Beds, Northern Iceland.” PALYNOLOGY 36.1 (2012): 10–25. Print.