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Two new Triassic eutomocerid ammonoid cephalopods (Ammonoidea: Ceratitidae) from southeastern peninsular Thailand |
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| รหัสดีโอไอ | |
| Creator | Kittichai Tongtherm |
| Title | Two new Triassic eutomocerid ammonoid cephalopods (Ammonoidea: Ceratitidae) from southeastern peninsular Thailand |
| Contributor | Kittichai Tongtherm, Jaruwat Nabhitabhata and Surangkana Tuanapaya |
| Publisher | Phuket Marine Biological Center |
| Publication Year | 2564 |
| Journal Title | Phuket Marine Biological Center Research Bulletin |
| Journal Vol. | 78 |
| Page no. | 147153 |
| Keyword | new species, Triassic Strata, ceratitid ammonoids, Eutomoceras, Peninsular Thailand |
| URL Website | https://km.dmcr.go.th/th/c_267 |
| Website title | PMBC Research Bulletin |
| ISSN | 2697-6324 |
| Abstract | Two ceratitid ammonoids of Eutomoceras are described as new species based on characters in the internal mold of the phragmocone. The specimens were collected from Khao Ok-Thalu, Chaiburi Formation, Triassic strata in Changwat Phatthalung, southeastern Peninsular Thailand. The two new species share characters of bifurcate ribs, absence of marginal furrows on the ventral keel and round ventrolateral shoulders. The umbilicus is wide with the absence of knots on the shoulder in E. paladeji sp. nov., but it is narrower with the presence of knots in E. wantanae sp. nov. The new species bring the number of described Eutomoceras species to seven. The identification key to species of Eutomoceras is proposed herein. |
