Abstract
A new species of the probable calcareous alga Amsassia, A. koreanensis, is recognized from the Duwibong Formation (Middle Ordovician, Darriwilian) of the Taebaeksan Basin in mid-eastern Korea. This is the first report of the genus from the Korean Peninsula, expanding its geographical range to the eastern Sino-Korean Block. The new species also occurs in the Xiazhen Formation (Upper Ordovician, Katian) at Zhuzhai in the South China Block. Amsassia koreanensis is the smallest species of this modular genus, having a maximum module diameter of 0.28 mm. Module increase is by bipartite, tripartite and quadripartite types of longitudinal axial fission, but unlike other species of the genus, quadripartite fission is common. The types of fission are comparable to those in some Tetradiida (now Prismostylales, florideophycean rhodophyte algae), although the processes of fission are different. The distribution of A. koreanensis further strengthens the biogeographical connection between the Sino-Korean and South China blocks, suggesting that these two paleocontinents were located closer together during the Middle to Late Ordovician than previously speculated.
| Original language | English |
|---|---|
| Pages (from-to) | 796-806 |
| Number of pages | 11 |
| Journal | Acta Geologica Sinica |
| Volume | 90 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2016 Jun 1 |
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Keywords
- Amsassia koreanensis sp. nov.
- Ordovician
- paleobiology
- paleogeography
- Sino-Korean Block
- South China Block
ASJC Scopus subject areas
- Geology
Cite this
A New Species of Amsassia from the Ordovician of Korea and South China : Paleobiological and Paleogeographical Significance. / LEE, Mirinae; PARK, Heeju; TIEN, Nguyen Viet; Choh, Suk-Joo; ELIAS, Robert J.; LEE, Dong Jin.
In: Acta Geologica Sinica, Vol. 90, No. 3, 01.06.2016, p. 796-806.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A New Species of Amsassia from the Ordovician of Korea and South China
T2 - Paleobiological and Paleogeographical Significance
AU - LEE, Mirinae
AU - PARK, Heeju
AU - TIEN, Nguyen Viet
AU - Choh, Suk-Joo
AU - ELIAS, Robert J.
AU - LEE, Dong Jin
PY - 2016/6/1
Y1 - 2016/6/1
N2 - A new species of the probable calcareous alga Amsassia, A. koreanensis, is recognized from the Duwibong Formation (Middle Ordovician, Darriwilian) of the Taebaeksan Basin in mid-eastern Korea. This is the first report of the genus from the Korean Peninsula, expanding its geographical range to the eastern Sino-Korean Block. The new species also occurs in the Xiazhen Formation (Upper Ordovician, Katian) at Zhuzhai in the South China Block. Amsassia koreanensis is the smallest species of this modular genus, having a maximum module diameter of 0.28 mm. Module increase is by bipartite, tripartite and quadripartite types of longitudinal axial fission, but unlike other species of the genus, quadripartite fission is common. The types of fission are comparable to those in some Tetradiida (now Prismostylales, florideophycean rhodophyte algae), although the processes of fission are different. The distribution of A. koreanensis further strengthens the biogeographical connection between the Sino-Korean and South China blocks, suggesting that these two paleocontinents were located closer together during the Middle to Late Ordovician than previously speculated.
AB - A new species of the probable calcareous alga Amsassia, A. koreanensis, is recognized from the Duwibong Formation (Middle Ordovician, Darriwilian) of the Taebaeksan Basin in mid-eastern Korea. This is the first report of the genus from the Korean Peninsula, expanding its geographical range to the eastern Sino-Korean Block. The new species also occurs in the Xiazhen Formation (Upper Ordovician, Katian) at Zhuzhai in the South China Block. Amsassia koreanensis is the smallest species of this modular genus, having a maximum module diameter of 0.28 mm. Module increase is by bipartite, tripartite and quadripartite types of longitudinal axial fission, but unlike other species of the genus, quadripartite fission is common. The types of fission are comparable to those in some Tetradiida (now Prismostylales, florideophycean rhodophyte algae), although the processes of fission are different. The distribution of A. koreanensis further strengthens the biogeographical connection between the Sino-Korean and South China blocks, suggesting that these two paleocontinents were located closer together during the Middle to Late Ordovician than previously speculated.
KW - Amsassia koreanensis sp. nov.
KW - Ordovician
KW - paleobiology
KW - paleogeography
KW - Sino-Korean Block
KW - South China Block
UR - http://www.scopus.com/inward/record.url?scp=84976620501&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84976620501&partnerID=8YFLogxK
U2 - 10.1111/1755-6724.12723
DO - 10.1111/1755-6724.12723
M3 - Article
VL - 90
SP - 796
EP - 806
JO - Acta Geologica Sinica
JF - Acta Geologica Sinica
SN - 0001-5717
IS - 3
ER -