Exhibit 21.1

Subsidiaries of TransAtlantic Petroleum Ltd.

April 21, 2011



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|Subsidiary                                                              |  | Jurisdiction of Incorporation
|Amity Oil International Pty. Ltd.                                       |  | Australia                    
|Incremental Petroleum Pty. Ltd.                                         |  | Australia                    
|Incremental Petroleum (Selmo) Pty. Ltd.                                 |  | Australia                    
|TransAtlantic Australia Pty. Ltd.                                       |  | Australia                    
|TransAtlantic Exploration Mediterranean International Pty Ltd.          |  | Australia                    
|TransAtlantic (Holdings) Australia Pty. Ltd.                            |  | Australia                    
|DMLP, Ltd.                                                              |  | Bahamas                      
|Talon Exploration, Ltd.                                                 |  | Bahamas                      
|TransAtlantic Maroc, Ltd.                                               |  | Bahamas                      
|TransAtlantic Worldwide, Ltd.                                           |  | Bahamas                      
|Viking Geophysical Services, Ltd.                                       |  | Bahamas                      
|TransAtlantic Turkey, Ltd.                                              |  | Bahamas                      
|Viking Wireline Services, Ltd.                                          |  | Bahamas                      
|Longe Energy Limited                                                    |  | Bermuda                      
|Viking International Limited                                            |  | Bermuda                      
|Direct Petroleum Bulgaria EOOD                                          |  | Bulgaria                     
|Incremental Petroleum (USA) Inc.                                        |  | California                   
|Incremental Petroleum (USA) KMD LLC                                     |  | California                   
|Anschutz Morocco Corporation                                            |  | Colorado                     
|Direct Petroleum Morocco, Inc.                                          |  | Colorado                     
|TransAtlantic Petroleum (USA) Corp.                                     |  | Colorado                     
|Longe Energy Cyprus Limited                                             |  | Cyprus                       
|TransAtlantic Petroleum Cyprus Limited                                  |  | Cyprus                       
|MOS Viking SARL                                                         |  | Morocco                      
|TransAtlantic Worldwide Romania SRL                                     |  | Romania                      
|Viking Oilfield Services SRL                                            |  | Romania                      
|Petrogas Petrol Gaz ve Petrokemya Urunleri Insaat Sanayive Ticaret A.S. |  | Turkey